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沉默王二 / ToBeBetterJavaer
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import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as i,a as s,b as t,d as n,e}from"./app.615e41d8.js";const l={},r=s("h1",{id:"\u9762\u6E23\u9006\u88AD-spring-\u5FC5\u770B",tabindex:"-1"},[s("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-spring-\u5FC5\u770B","aria-hidden":"true"},"#"),n(" \u9762\u6E23\u9006\u88AD\uFF08Spring\uFF09\u5FC5\u770B\u{1F44D}")],-1),u=n("\u56FE\u6587\u8BE6\u89E3 35 \u9053Spring\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),d={href:"https://mp.weixin.qq.com/s/EQge6DmgIqYITM3mAxkatg",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),v=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),m={href:"https://mp.weixin.qq.com/s/Y17S85ntHm_MLTZMJdtjQQ",target:"_blank",rel:"noopener noreferrer"},b=n("\u539F\u6587\u94FE\u63A5"),g=n("\u3002"),f=e(`<h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1-spring-\u662F\u4EC0\u4E48-\u7279\u6027-\u6709\u54EA\u4E9B\u6A21\u5757" tabindex="-1"><a class="header-anchor" href="#_1-spring-\u662F\u4EC0\u4E48-\u7279\u6027-\u6709\u54EA\u4E9B\u6A21\u5757" aria-hidden="true">#</a> 1.Spring \u662F\u4EC0\u4E48\uFF1F\u7279\u6027\uFF1F\u6709\u54EA\u4E9B\u6A21\u5757\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-165c27b4-2ea0-409a-8fa5-389c105db0fa.png" alt="Spring Logo"></p><p>\u4E00\u53E5\u8BDD\u6982\u62EC\uFF1A<strong>Spring \u662F\u4E00\u4E2A\u8F7B\u91CF\u7EA7\u3001\u975E\u5165\u4FB5\u5F0F\u7684\u63A7\u5236\u53CD\u8F6C (IoC) \u548C\u9762\u5411\u5207\u9762 (AOP) \u7684\u6846\u67B6\u3002</strong></p><p>2003 \u5E74\uFF0C\u4E00\u4E2A\u97F3\u4E50\u5BB6 Rod Johnson \u51B3\u5B9A\u53D1\u5C55\u4E00\u4E2A\u8F7B\u91CF\u7EA7\u7684 Java \u5F00\u53D1\u6846\u67B6\uFF0C<code>Spring</code>\u4F5C\u4E3A Java \u6218\u573A\u7684\u9F99\u9A91\u5175\u6E10\u6E10\u5D1B\u8D77\uFF0C\u5E76\u6DD8\u6C70\u4E86<code>EJB</code>\u8FD9\u4E2A\u4F20\u7EDF\u7684\u91CD\u88C5\u9A91\u5175\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-5d9efb93-03a5-400c-8429-3be7c5eeddfb.png" alt="Spring\u91CD\u8981\u7248\u672C"></p><p>\u5230\u4E86\u73B0\u5728\uFF0C\u4F01\u4E1A\u7EA7\u5F00\u53D1\u7684\u6807\u914D\u57FA\u672C\u5C31\u662F <strong>Spring5</strong> + <strong>Spring Boot 2</strong> + <strong>JDK 8</strong></p><blockquote><p>Spring \u6709\u54EA\u4E9B\u7279\u6027\u5462\uFF1F</p></blockquote><p>Spring \u6709\u5F88\u591A\u4F18\u70B9\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-a0f0ef9d-3289-41ea-94c2-34b7e37ef854.png" alt="Spring\u7279\u6027"></p><ol><li><strong>IOC</strong> \u548C <strong>DI</strong> \u7684\u652F\u6301</li></ol><p>Spring \u7684\u6838\u5FC3\u5C31\u662F\u4E00\u4E2A\u5927\u7684\u5DE5\u5382\u5BB9\u5668\uFF0C\u53EF\u4EE5\u7EF4\u62A4\u6240\u6709\u5BF9\u8C61\u7684\u521B\u5EFA\u548C\u4F9D\u8D56\u5173\u7CFB\uFF0CSpring \u5DE5\u5382\u7528\u4E8E\u751F\u6210 Bean\uFF0C\u5E76\u4E14\u7BA1\u7406 Bean \u7684\u751F\u547D\u5468\u671F\uFF0C\u5B9E\u73B0<strong>\u9AD8\u5185\u805A\u4F4E\u8026\u5408</strong>\u7684\u8BBE\u8BA1\u7406\u5FF5\u3002</p><ol start="2"><li>AOP \u7F16\u7A0B\u7684\u652F\u6301</li></ol><p>Spring \u63D0\u4F9B\u4E86<strong>\u9762\u5411\u5207\u9762\u7F16\u7A0B</strong>\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u7684\u5B9E\u73B0\u5BF9\u7A0B\u5E8F\u8FDB\u884C\u6743\u9650\u62E6\u622A\u3001\u8FD0\u884C\u76D1\u63A7\u7B49\u5207\u9762\u529F\u80FD\u3002</p><ol start="3"><li>\u58F0\u660E\u5F0F\u4E8B\u52A1\u7684\u652F\u6301</li></ol><p>\u652F\u6301\u901A\u8FC7\u914D\u7F6E\u5C31\u6765\u5B8C\u6210\u5BF9\u4E8B\u52A1\u7684\u7BA1\u7406\uFF0C\u800C\u4E0D\u9700\u8981\u901A\u8FC7\u786C\u7F16\u7801\u7684\u65B9\u5F0F\uFF0C\u4EE5\u524D\u91CD\u590D\u7684\u4E00\u4E9B\u4E8B\u52A1\u63D0\u4EA4\u3001\u56DE\u6EDA\u7684 JDBC \u4EE3\u7801\uFF0C\u90FD\u53EF\u4EE5\u4E0D\u7528\u81EA\u5DF1\u5199\u4E86\u3002</p><ol start="4"><li>\u5FEB\u6377\u6D4B\u8BD5\u7684\u652F\u6301</li></ol><p>Spring \u5BF9 Junit \u63D0\u4F9B\u652F\u6301\uFF0C\u53EF\u4EE5\u901A\u8FC7<strong>\u6CE8\u89E3</strong>\u5FEB\u6377\u5730\u6D4B\u8BD5 Spring \u7A0B\u5E8F\u3002</p><ol start="5"><li>\u5FEB\u901F\u96C6\u6210\u529F\u80FD</li></ol><p>\u65B9\u4FBF\u96C6\u6210\u5404\u79CD\u4F18\u79C0\u6846\u67B6\uFF0CSpring \u4E0D\u6392\u65A5\u5404\u79CD\u4F18\u79C0\u7684\u5F00\u6E90\u6846\u67B6\uFF0C\u5176\u5185\u90E8\u63D0\u4F9B\u4E86\u5BF9\u5404\u79CD\u4F18\u79C0\u6846\u67B6\uFF08\u5982\uFF1AStruts\u3001Hibernate\u3001MyBatis\u3001Quartz \u7B49\uFF09\u7684\u76F4\u63A5\u652F\u6301\u3002</p><ol start="6"><li>\u590D\u6742 API \u6A21\u677F\u5C01\u88C5</li></ol><p>Spring \u5BF9 JavaEE \u5F00\u53D1\u4E2D\u975E\u5E38\u96BE\u7528\u7684\u4E00\u4E9B API\uFF08JDBC\u3001JavaMail\u3001\u8FDC\u7A0B\u8C03\u7528\u7B49\uFF09\u90FD\u63D0\u4F9B\u4E86\u6A21\u677F\u5316\u7684\u5C01\u88C5\uFF0C\u8FD9\u4E9B\u5C01\u88C5 API \u7684\u63D0\u4F9B\u4F7F\u5F97\u5E94\u7528\u96BE\u5EA6\u5927\u5927\u964D\u4F4E\u3002</p><h3 id="_2-spring-\u6709\u54EA\u4E9B\u6A21\u5757\u5462" tabindex="-1"><a class="header-anchor" href="#_2-spring-\u6709\u54EA\u4E9B\u6A21\u5757\u5462" aria-hidden="true">#</a> 2.Spring \u6709\u54EA\u4E9B\u6A21\u5757\u5462\uFF1F</h3><p>Spring \u6846\u67B6\u662F\u5206\u6A21\u5757\u5B58\u5728\uFF0C\u9664\u4E86\u6700\u6838\u5FC3\u7684<code>Spring Core Container</code>\u662F\u5FC5\u8981\u6A21\u5757\u4E4B\u5916\uFF0C\u5176\u4ED6\u6A21\u5757\u90FD\u662F<code>\u53EF\u9009</code>\uFF0C\u5927\u7EA6\u6709 20 \u591A\u4E2A\u6A21\u5757\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-bb7c13ea-3174-4b32-84b8-821849ddc377.png" alt="Spring\u6A21\u5757\u5212\u5206"></p><p>\u6700\u4E3B\u8981\u7684\u4E03\u5927\u6A21\u5757\uFF1A</p><ol><li><strong>Spring Core</strong>\uFF1ASpring \u6838\u5FC3\uFF0C\u5B83\u662F\u6846\u67B6\u6700\u57FA\u7840\u7684\u90E8\u5206\uFF0C\u63D0\u4F9B IOC \u548C\u4F9D\u8D56\u6CE8\u5165 DI \u7279\u6027\u3002</li><li><strong>Spring Context</strong>\uFF1ASpring \u4E0A\u4E0B\u6587\u5BB9\u5668\uFF0C\u5B83\u662F BeanFactory \u529F\u80FD\u52A0\u5F3A\u7684\u4E00\u4E2A\u5B50\u63A5\u53E3\u3002</li><li><strong>Spring Web</strong>\uFF1A\u5B83\u63D0\u4F9B Web \u5E94\u7528\u5F00\u53D1\u7684\u652F\u6301\u3002</li><li><strong>Spring MVC</strong>\uFF1A\u5B83\u9488\u5BF9 Web \u5E94\u7528\u4E2D MVC \u601D\u60F3\u7684\u5B9E\u73B0\u3002</li><li><strong>Spring DAO</strong>\uFF1A\u63D0\u4F9B\u5BF9 JDBC \u62BD\u8C61\u5C42\uFF0C\u7B80\u5316\u4E86 JDBC \u7F16\u7801\uFF0C\u540C\u65F6\uFF0C\u7F16\u7801\u66F4\u5177\u6709\u5065\u58EE\u6027\u3002</li><li><strong>Spring ORM</strong>\uFF1A\u5B83\u652F\u6301\u7528\u4E8E\u6D41\u884C\u7684 ORM \u6846\u67B6\u7684\u6574\u5408\uFF0C\u6BD4\u5982\uFF1ASpring + Hibernate\u3001Spring + iBatis\u3001Spring + JDO \u7684\u6574\u5408\u7B49\u3002</li><li><strong>Spring AOP</strong>\uFF1A\u5373\u9762\u5411\u5207\u9762\u7F16\u7A0B\uFF0C\u5B83\u63D0\u4F9B\u4E86\u4E0E AOP \u8054\u76DF\u517C\u5BB9\u7684\u7F16\u7A0B\u5B9E\u73B0\u3002</li></ol><h3 id="_3-spring-\u6709\u54EA\u4E9B\u5E38\u7528\u6CE8\u89E3\u5462" tabindex="-1"><a class="header-anchor" href="#_3-spring-\u6709\u54EA\u4E9B\u5E38\u7528\u6CE8\u89E3\u5462" aria-hidden="true">#</a> 3.Spring \u6709\u54EA\u4E9B\u5E38\u7528\u6CE8\u89E3\u5462\uFF1F</h3><p>Spring \u6709\u5F88\u591A\u6A21\u5757\uFF0C\u751A\u81F3\u5E7F\u4E49\u7684 SpringBoot\u3001SpringCloud \u4E5F\u7B97\u662F Spring \u7684\u4E00\u90E8\u5206\uFF0C\u6211\u4EEC\u6765\u5206\u6A21\u5757\uFF0C\u6309\u529F\u80FD\u6765\u770B\u4E00\u4E0B\u4E00\u4E9B\u5E38\u7528\u7684\u6CE8\u89E3\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-8d0a1518-a425-4887-9735-45321095d927.png" alt="Spring\u5E38\u7528\u6CE8\u89E3"></p><p><strong>Web</strong>:</p><ul><li>@Controller\uFF1A\u7EC4\u5408\u6CE8\u89E3\uFF08\u7EC4\u5408\u4E86@Component \u6CE8\u89E3\uFF09\uFF0C\u5E94\u7528\u5728 MVC \u5C42\uFF08\u63A7\u5236\u5C42\uFF09\u3002</li><li>@RestController\uFF1A\u8BE5\u6CE8\u89E3\u4E3A\u4E00\u4E2A\u7EC4\u5408\u6CE8\u89E3\uFF0C\u76F8\u5F53\u4E8E@Controller \u548C@ResponseBody \u7684\u7EC4\u5408\uFF0C\u6CE8\u89E3\u5728\u7C7B\u4E0A\uFF0C\u610F\u5473\u7740\uFF0C\u8BE5 Controller \u7684\u6240\u6709\u65B9\u6CD5\u90FD\u9ED8\u8BA4\u52A0\u4E0A\u4E86@ResponseBody\u3002</li><li>@RequestMapping\uFF1A\u7528\u4E8E\u6620\u5C04 Web \u8BF7\u6C42\uFF0C\u5305\u62EC\u8BBF\u95EE\u8DEF\u5F84\u548C\u53C2\u6570\u3002\u5982\u679C\u662F Restful \u98CE\u683C\u63A5\u53E3\uFF0C\u8FD8\u53EF\u4EE5\u6839\u636E\u8BF7\u6C42\u7C7B\u578B\u4F7F\u7528\u4E0D\u540C\u7684\u6CE8\u89E3\uFF1A <ul><li>@GetMapping</li><li>@PostMapping</li><li>@PutMapping</li><li>@DeleteMapping</li></ul></li><li>@ResponseBody\uFF1A\u652F\u6301\u5C06\u8FD4\u56DE\u503C\u653E\u5728 response \u5185\uFF0C\u800C\u4E0D\u662F\u4E00\u4E2A\u9875\u9762\uFF0C\u901A\u5E38\u7528\u6237\u8FD4\u56DE json \u6570\u636E\u3002</li><li>@RequestBody\uFF1A\u5141\u8BB8 request \u7684\u53C2\u6570\u5728 request \u4F53\u4E2D\uFF0C\u800C\u4E0D\u662F\u5728\u76F4\u63A5\u8FDE\u63A5\u5728\u5730\u5740\u540E\u9762\u3002</li><li>@PathVariable\uFF1A\u7528\u4E8E\u63A5\u6536\u8DEF\u5F84\u53C2\u6570\uFF0C\u6BD4\u5982 <code>@RequestMapping(\u201C/hello/{name}\u201D)</code>\u7533\u660E\u7684\u8DEF\u5F84\uFF0C\u5C06\u6CE8\u89E3\u653E\u5728\u53C2\u6570\u4E2D\u524D\uFF0C\u5373\u53EF\u83B7\u53D6\u8BE5\u503C\uFF0C\u901A\u5E38\u4F5C\u4E3A Restful \u7684\u63A5\u53E3\u5B9E\u73B0\u65B9\u6CD5\u3002</li><li>@RestController\uFF1A\u8BE5\u6CE8\u89E3\u4E3A\u4E00\u4E2A\u7EC4\u5408\u6CE8\u89E3\uFF0C\u76F8\u5F53\u4E8E@Controller \u548C@ResponseBody \u7684\u7EC4\u5408\uFF0C\u6CE8\u89E3\u5728\u7C7B\u4E0A\uFF0C\u610F\u5473\u7740\uFF0C\u8BE5 Controller \u7684\u6240\u6709\u65B9\u6CD5\u90FD\u9ED8\u8BA4\u52A0\u4E0A\u4E86@ResponseBody\u3002</li></ul><p><strong>\u5BB9\u5668</strong>:</p><ul><li>@Component\uFF1A\u8868\u793A\u4E00\u4E2A\u5E26\u6CE8\u91CA\u7684\u7C7B\u662F\u4E00\u4E2A\u201C\u7EC4\u4EF6\u201D\uFF0C\u6210\u4E3A Spring \u7BA1\u7406\u7684 Bean\u3002\u5F53\u4F7F\u7528\u57FA\u4E8E\u6CE8\u89E3\u7684\u914D\u7F6E\u548C\u7C7B\u8DEF\u5F84\u626B\u63CF\u65F6\uFF0C\u8FD9\u4E9B\u7C7B\u88AB\u89C6\u4E3A\u81EA\u52A8\u68C0\u6D4B\u7684\u5019\u9009\u5BF9\u8C61\u3002\u540C\u65F6@Component \u8FD8\u662F\u4E00\u4E2A\u5143\u6CE8\u89E3\u3002</li><li>@Service\uFF1A\u7EC4\u5408\u6CE8\u89E3\uFF08\u7EC4\u5408\u4E86@Component \u6CE8\u89E3\uFF09\uFF0C\u5E94\u7528\u5728 service \u5C42\uFF08\u4E1A\u52A1\u903B\u8F91\u5C42\uFF09\u3002</li><li>@Repository\uFF1A\u7EC4\u5408\u6CE8\u89E3\uFF08\u7EC4\u5408\u4E86@Component \u6CE8\u89E3\uFF09\uFF0C\u5E94\u7528\u5728 dao \u5C42\uFF08\u6570\u636E\u8BBF\u95EE\u5C42\uFF09\u3002</li><li>@Autowired\uFF1ASpring \u63D0\u4F9B\u7684\u5DE5\u5177\uFF08\u7531 Spring \u7684\u4F9D\u8D56\u6CE8\u5165\u5DE5\u5177\uFF08BeanPostProcessor\u3001BeanFactoryPostProcessor\uFF09\u81EA\u52A8\u6CE8\u5165\uFF09\u3002</li><li>@Qualifier\uFF1A\u8BE5\u6CE8\u89E3\u901A\u5E38\u8DDF @Autowired \u4E00\u8D77\u4F7F\u7528\uFF0C\u5F53\u60F3\u5BF9\u6CE8\u5165\u7684\u8FC7\u7A0B\u505A\u66F4\u591A\u7684\u63A7\u5236\uFF0C@Qualifier \u53EF\u5E2E\u52A9\u914D\u7F6E\uFF0C\u6BD4\u5982\u4E24\u4E2A\u4EE5\u4E0A\u76F8\u540C\u7C7B\u578B\u7684 Bean \u65F6 Spring \u65E0\u6CD5\u6289\u62E9\uFF0C\u7528\u5230\u6B64\u6CE8\u89E3</li><li>@Configuration\uFF1A\u58F0\u660E\u5F53\u524D\u7C7B\u662F\u4E00\u4E2A\u914D\u7F6E\u7C7B\uFF08\u76F8\u5F53\u4E8E\u4E00\u4E2A Spring \u914D\u7F6E\u7684 xml \u6587\u4EF6\uFF09</li><li>@Value\uFF1A\u53EF\u7528\u5728\u5B57\u6BB5\uFF0C\u6784\u9020\u5668\u53C2\u6570\u8DDF\u65B9\u6CD5\u53C2\u6570\uFF0C\u6307\u5B9A\u4E00\u4E2A\u9ED8\u8BA4\u503C\uFF0C\u652F\u6301 <code>#{} \u8DDF \\\${}</code> \u4E24\u4E2A\u65B9\u5F0F\u3002\u4E00\u822C\u5C06 SpringbBoot \u4E2D\u7684 application.properties \u914D\u7F6E\u7684\u5C5E\u6027\u503C\u8D4B\u503C\u7ED9\u53D8\u91CF\u3002</li><li>@Bean\uFF1A\u6CE8\u89E3\u5728\u65B9\u6CD5\u4E0A\uFF0C\u58F0\u660E\u5F53\u524D\u65B9\u6CD5\u7684\u8FD4\u56DE\u503C\u4E3A\u4E00\u4E2A Bean\u3002\u8FD4\u56DE\u7684 Bean \u5BF9\u5E94\u7684\u7C7B\u4E2D\u53EF\u4EE5\u5B9A\u4E49 init()\u65B9\u6CD5\u548C destroy()\u65B9\u6CD5\uFF0C\u7136\u540E\u5728<code>@Bean(initMethod=\u201Dinit\u201D,destroyMethod=\u201Ddestroy\u201D)</code>\u5B9A\u4E49\uFF0C\u5728\u6784\u9020\u4E4B\u540E\u6267\u884C init\uFF0C\u5728\u9500\u6BC1\u4E4B\u524D\u6267\u884C destroy\u3002</li><li>@Scope:\u5B9A\u4E49\u6211\u4EEC\u91C7\u7528\u4EC0\u4E48\u6A21\u5F0F\u53BB\u521B\u5EFA Bean\uFF08\u65B9\u6CD5\u4E0A\uFF0C\u5F97\u6709@Bean\uFF09 \u5176\u8BBE\u7F6E\u7C7B\u578B\u5305\u62EC\uFF1ASingleton \u3001Prototype\u3001Request \u3001 Session\u3001GlobalSession\u3002</li></ul><p><strong>AOP</strong>:</p><ul><li>@Aspect:\u58F0\u660E\u4E00\u4E2A\u5207\u9762\uFF08\u7C7B\u4E0A\uFF09 \u4F7F\u7528@After\u3001@Before\u3001@Around \u5B9A\u4E49\u5EFA\u8A00\uFF08advice\uFF09\uFF0C\u53EF\u76F4\u63A5\u5C06\u62E6\u622A\u89C4\u5219\uFF08\u5207\u70B9\uFF09\u4F5C\u4E3A\u53C2\u6570\u3002 <ul><li><code>@After</code> \uFF1A\u5728\u65B9\u6CD5\u6267\u884C\u4E4B\u540E\u6267\u884C\uFF08\u65B9\u6CD5\u4E0A\uFF09\u3002</li><li><code>@Before</code>\uFF1A \u5728\u65B9\u6CD5\u6267\u884C\u4E4B\u524D\u6267\u884C\uFF08\u65B9\u6CD5\u4E0A\uFF09\u3002</li><li><code>@Around</code>\uFF1A \u5728\u65B9\u6CD5\u6267\u884C\u4E4B\u524D\u4E0E\u4E4B\u540E\u6267\u884C\uFF08\u65B9\u6CD5\u4E0A\uFF09\u3002</li><li><code>@PointCut</code>\uFF1A \u58F0\u660E\u5207\u70B9 \u5728 java \u914D\u7F6E\u7C7B\u4E2D\u4F7F\u7528@EnableAspectJAutoProxy \u6CE8\u89E3\u5F00\u542F Spring \u5BF9 AspectJ \u4EE3\u7406\u7684\u652F\u6301\uFF08\u7C7B\u4E0A\uFF09\u3002</li></ul></li></ul><p><strong>\u4E8B\u52A1\uFF1A</strong></p><ul><li>@Transactional\uFF1A\u5728\u8981\u5F00\u542F\u4E8B\u52A1\u7684\u65B9\u6CD5\u4E0A\u4F7F\u7528@Transactional \u6CE8\u89E3\uFF0C\u5373\u53EF\u58F0\u660E\u5F0F\u5F00\u542F\u4E8B\u52A1\u3002</li></ul><h3 id="_4-spring-\u4E2D\u5E94\u7528\u4E86\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\u5462" tabindex="-1"><a class="header-anchor" href="#_4-spring-\u4E2D\u5E94\u7528\u4E86\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\u5462" aria-hidden="true">#</a> 4.Spring \u4E2D\u5E94\u7528\u4E86\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\u5462\uFF1F</h3><p>Spring \u6846\u67B6\u4E2D\u5E7F\u6CDB\u4F7F\u7528\u4E86\u4E0D\u540C\u7C7B\u578B\u7684\u8BBE\u8BA1\u6A21\u5F0F\uFF0C\u4E0B\u9762\u6211\u4EEC\u6765\u770B\u770B\u5230\u5E95\u6709\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F?</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-ee1c5cee-8462-4bae-93ea-ec936cc77640.png" alt="Spring\u4E2D\u7528\u5230\u7684\u8BBE\u8BA1\u6A21\u5F0F"></p><ol><li><strong>\u5DE5\u5382\u6A21\u5F0F</strong> : Spring \u5BB9\u5668\u672C\u8D28\u662F\u4E00\u4E2A\u5927\u5DE5\u5382\uFF0C\u4F7F\u7528\u5DE5\u5382\u6A21\u5F0F\u901A\u8FC7 BeanFactory\u3001ApplicationContext \u521B\u5EFA bean \u5BF9\u8C61\u3002</li><li><strong>\u4EE3\u7406\u6A21\u5F0F</strong> : Spring AOP \u529F\u80FD\u529F\u80FD\u5C31\u662F\u901A\u8FC7\u4EE3\u7406\u6A21\u5F0F\u6765\u5B9E\u73B0\u7684\uFF0C\u5206\u4E3A\u52A8\u6001\u4EE3\u7406\u548C\u9759\u6001\u4EE3\u7406\u3002</li><li><strong>\u5355\u4F8B\u6A21\u5F0F</strong> : Spring \u4E2D\u7684 Bean \u9ED8\u8BA4\u90FD\u662F\u5355\u4F8B\u7684\uFF0C\u8FD9\u6837\u6709\u5229\u4E8E\u5BB9\u5668\u5BF9 Bean \u7684\u7BA1\u7406\u3002</li><li><strong>\u6A21\u677F\u6A21\u5F0F</strong> : Spring \u4E2D JdbcTemplate\u3001RestTemplate \u7B49\u4EE5 Template \u7ED3\u5C3E\u7684\u5BF9\u6570\u636E\u5E93\u3001\u7F51\u7EDC\u7B49\u7B49\u8FDB\u884C\u64CD\u4F5C\u7684\u6A21\u677F\u7C7B\uFF0C\u5C31\u4F7F\u7528\u5230\u4E86\u6A21\u677F\u6A21\u5F0F\u3002</li><li><strong>\u89C2\u5BDF\u8005\u6A21\u5F0F</strong>: Spring \u4E8B\u4EF6\u9A71\u52A8\u6A21\u578B\u5C31\u662F\u89C2\u5BDF\u8005\u6A21\u5F0F\u5F88\u7ECF\u5178\u7684\u4E00\u4E2A\u5E94\u7528\u3002</li><li><strong>\u9002\u914D\u5668\u6A21\u5F0F</strong> :Spring AOP \u7684\u589E\u5F3A\u6216\u901A\u77E5 (Advice) \u4F7F\u7528\u5230\u4E86\u9002\u914D\u5668\u6A21\u5F0F\u3001Spring MVC \u4E2D\u4E5F\u662F\u7528\u5230\u4E86\u9002\u914D\u5668\u6A21\u5F0F\u9002\u914D Controller\u3002</li><li><strong>\u7B56\u7565\u6A21\u5F0F</strong>\uFF1ASpring \u4E2D\u6709\u4E00\u4E2A Resource \u63A5\u53E3\uFF0C\u5B83\u7684\u4E0D\u540C\u5B9E\u73B0\u7C7B\uFF0C\u4F1A\u6839\u636E\u4E0D\u540C\u7684\u7B56\u7565\u53BB\u8BBF\u95EE\u8D44\u6E90\u3002</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="ioc" tabindex="-1"><a class="header-anchor" href="#ioc" aria-hidden="true">#</a> IOC</h2><h3 id="_5-\u8BF4\u4E00\u8BF4\u4EC0\u4E48\u662F-ioc-\u4EC0\u4E48\u662F-di" tabindex="-1"><a class="header-anchor" href="#_5-\u8BF4\u4E00\u8BF4\u4EC0\u4E48\u662F-ioc-\u4EC0\u4E48\u662F-di" aria-hidden="true">#</a> 5.\u8BF4\u4E00\u8BF4\u4EC0\u4E48\u662F IOC\uFF1F\u4EC0\u4E48\u662F DI?</h3><p>Java \u662F\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u4E00\u4E2A\u4E2A\u5B9E\u4F8B\u5BF9\u8C61\u76F8\u4E92\u5408\u4F5C\u7EC4\u6210\u4E86\u4E1A\u52A1\u903B\u8F91\uFF0C\u539F\u6765\uFF0C\u6211\u4EEC\u90FD\u662F\u5728\u4EE3\u7801\u91CC\u521B\u5EFA\u5BF9\u8C61\u548C\u5BF9\u8C61\u7684\u4F9D\u8D56\u3002</p><p>\u6240\u8C13\u7684<strong>IOC</strong>\uFF08\u63A7\u5236\u53CD\u8F6C\uFF09\uFF1A\u5C31\u662F\u7531\u5BB9\u5668\u6765\u8D1F\u8D23\u63A7\u5236\u5BF9\u8C61\u7684\u751F\u547D\u5468\u671F\u548C\u5BF9\u8C61\u95F4\u7684\u5173\u7CFB\u3002\u4EE5\u524D\u662F\u6211\u4EEC\u60F3\u8981\u4EC0\u4E48\uFF0C\u5C31\u81EA\u5DF1\u521B\u5EFA\u4EC0\u4E48\uFF0C\u73B0\u5728\u662F\u6211\u4EEC\u9700\u8981\u4EC0\u4E48\uFF0C\u5BB9\u5668\u5C31\u7ED9\u6211\u4EEC\u9001\u6765\u4EC0\u4E48\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-619da277-c15e-4dd7-9f2b-dbd809a9aaa0.png" alt="\u5F15\u5165IOC\u4E4B\u524D\u548C\u5F15\u5165IOC\u4E4B\u540E"></p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u63A7\u5236\u5BF9\u8C61\u751F\u547D\u5468\u671F\u7684\u4E0D\u518D\u662F\u5F15\u7528\u5B83\u7684\u5BF9\u8C61\uFF0C\u800C\u662F\u5BB9\u5668\u3002\u5BF9\u5177\u4F53\u5BF9\u8C61\uFF0C\u4EE5\u524D\u662F\u5B83\u63A7\u5236\u5176\u5B83\u5BF9\u8C61\uFF0C\u73B0\u5728\u6240\u6709\u5BF9\u8C61\u90FD\u88AB\u5BB9\u5668\u63A7\u5236\uFF0C\u6240\u4EE5\u8FD9\u5C31\u53EB<strong>\u63A7\u5236\u53CD\u8F6C</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-440f5d0e-f4db-462c-97fb-d54407a354d5.png" alt="\u63A7\u5236\u53CD\u8F6C\u793A\u610F\u56FE"></p><p><strong>DI\uFF08\u4F9D\u8D56\u6CE8\u5165\uFF09</strong>\uFF1A\u6307\u7684\u662F\u5BB9\u5668\u5728\u5B9E\u4F8B\u5316\u5BF9\u8C61\u7684\u65F6\u5019\u628A\u5B83\u4F9D\u8D56\u7684\u7C7B\u6CE8\u5165\u7ED9\u5B83\u3002\u6709\u7684\u8BF4\u6CD5 IOC \u548C DI \u662F\u4E00\u56DE\u4E8B\uFF0C\u6709\u7684\u8BF4\u6CD5\u662F IOC \u662F\u601D\u60F3\uFF0CDI \u662F IOC \u7684\u5B9E\u73B0\u3002</p><blockquote><p><strong>\u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528 IOC \u5462\uFF1F</strong></p></blockquote><p>\u6700\u4E3B\u8981\u7684\u662F\u4E24\u4E2A\u5B57<strong>\u89E3\u8026</strong>\uFF0C\u786C\u7F16\u7801\u4F1A\u9020\u6210\u5BF9\u8C61\u95F4\u7684\u8FC7\u5EA6\u8026\u5408\uFF0C\u4F7F\u7528 IOC \u4E4B\u540E\uFF0C\u6211\u4EEC\u53EF\u4EE5\u4E0D\u7528\u5173\u5FC3\u5BF9\u8C61\u95F4\u7684\u4F9D\u8D56\uFF0C\u4E13\u5FC3\u5F00\u53D1\u5E94\u7528\u5C31\u884C\u3002</p><h3 id="_6-\u80FD\u7B80\u5355\u8BF4\u4E00\u4E0B-spring-ioc-\u7684\u5B9E\u73B0\u673A\u5236\u5417" tabindex="-1"><a class="header-anchor" href="#_6-\u80FD\u7B80\u5355\u8BF4\u4E00\u4E0B-spring-ioc-\u7684\u5B9E\u73B0\u673A\u5236\u5417" aria-hidden="true">#</a> 6.\u80FD\u7B80\u5355\u8BF4\u4E00\u4E0B Spring IOC \u7684\u5B9E\u73B0\u673A\u5236\u5417\uFF1F</h3><p>PS:\u8FD9\u9053\u9898\u8001\u4E09\u5728\u9762\u8BD5\u4E2D\u88AB\u95EE\u5230\u8FC7\uFF0C\u95EE\u6CD5\u662F\u201C<strong>\u4F60\u6709\u81EA\u5DF1\u5B9E\u73B0\u8FC7\u7B80\u5355\u7684 Spring \u5417\uFF1F</strong>\u201D</p><p>Spring \u7684 IOC \u672C\u8D28\u5C31\u662F\u4E00\u4E2A\u5927\u5DE5\u5382\uFF0C\u6211\u4EEC\u60F3\u60F3\u4E00\u4E2A\u5DE5\u5382\u662F\u600E\u4E48\u8FD0\u884C\u7684\u5462\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-7678c40f-a48d-4bd5-80f8-e902ad688e11.png" alt="\u5DE5\u5382\u8FD0\u884C"></p><ul><li><p><strong>\u751F\u4EA7\u4EA7\u54C1</strong>\uFF1A\u4E00\u4E2A\u5DE5\u5382\u6700\u6838\u5FC3\u7684\u529F\u80FD\u5C31\u662F\u751F\u4EA7\u4EA7\u54C1\u3002\u5728 Spring \u91CC\uFF0C\u4E0D\u7528 Bean \u81EA\u5DF1\u6765\u5B9E\u4F8B\u5316\uFF0C\u800C\u662F\u4EA4\u7ED9 Spring\uFF0C\u5E94\u8BE5\u600E\u4E48\u5B9E\u73B0\u5462\uFF1F\u2014\u2014\u7B54\u6848\u6BEB\u65E0\u7591\u95EE\uFF0C<strong>\u53CD\u5C04</strong>\u3002</p><p>\u90A3\u4E48\u8FD9\u4E2A\u5382\u5B50\u7684\u751F\u4EA7\u7BA1\u7406\u662F\u600E\u4E48\u505A\u7684\uFF1F\u4F60\u5E94\u8BE5\u4E5F\u77E5\u9053\u2014\u2014<strong>\u5DE5\u5382\u6A21\u5F0F</strong>\u3002</p></li><li><p><strong>\u5E93\u5B58\u4EA7\u54C1</strong>\uFF1A\u5DE5\u5382\u4E00\u822C\u90FD\u662F\u6709\u5E93\u623F\u7684\uFF0C\u7528\u6765\u5E93\u5B58\u4EA7\u54C1\uFF0C\u6BD5\u7ADF\u751F\u4EA7\u7684\u4EA7\u54C1\u4E0D\u80FD\u7ACB\u9A6C\u5C31\u62C9\u8D70\u3002Spring \u6211\u4EEC\u90FD\u77E5\u9053\u662F\u4E00\u4E2A\u5BB9\u5668\uFF0C\u8FD9\u4E2A\u5BB9\u5668\u91CC\u5B58\u7684\u5C31\u662F\u5BF9\u8C61\uFF0C\u4E0D\u80FD\u6BCF\u6B21\u6765\u53D6\u5BF9\u8C61\uFF0C\u90FD\u5F97\u73B0\u573A\u6765\u53CD\u5C04\u521B\u5EFA\u5BF9\u8C61\uFF0C\u5F97\u628A\u521B\u5EFA\u51FA\u7684\u5BF9\u8C61\u5B58\u8D77\u6765\u3002</p></li><li><p><strong>\u8BA2\u5355\u5904\u7406</strong>\uFF1A\u8FD8\u6709\u6700\u91CD\u8981\u7684\u4E00\u70B9\uFF0C\u5DE5\u5382\u6839\u636E\u4EC0\u4E48\u6765\u63D0\u4F9B\u4EA7\u54C1\u5462\uFF1F\u8BA2\u5355\u3002\u8FD9\u4E9B\u8BA2\u5355\u53EF\u80FD\u4E94\u82B1\u516B\u95E8\uFF0C\u6709\u7EBF\u4E0A\u7B7E\u7B7E\u7684\u3001\u6709\u5230\u5DE5\u5382\u7B7E\u7684\u3001\u8FD8\u6709\u5DE5\u5382\u9500\u552E\u4E0A\u95E8\u7B7E\u7684\u2026\u2026\u6700\u540E\u7ECF\u8FC7\u5904\u7406\uFF0C\u6307\u5BFC\u5DE5\u5382\u7684\u51FA\u8D27\u3002</p><p>\u5728 Spring \u91CC\uFF0C\u4E5F\u6709\u8FD9\u6837\u7684\u8BA2\u5355\uFF0C\u5B83\u5C31\u662F\u6211\u4EEC bean \u7684\u5B9A\u4E49\u548C\u4F9D\u8D56\u5173\u7CFB\uFF0C\u53EF\u4EE5\u662F xml \u5F62\u5F0F\uFF0C\u4E5F\u53EF\u4EE5\u662F\u6211\u4EEC\u6700\u719F\u6089\u7684\u6CE8\u89E3\u5F62\u5F0F\u3002</p></li></ul><p>\u6211\u4EEC\u7B80\u5355\u5730\u5B9E\u73B0\u4E00\u4E2A mini \u7248\u7684 Spring IOC\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-1d55c63d-2d12-43b1-9f43-428f5f4a1413.png" alt="mini\u7248\u672CSpring IOC"></p><p><strong>Bean \u5B9A\u4E49\uFF1A</strong></p><p>Bean \u901A\u8FC7\u4E00\u4E2A\u914D\u7F6E\u6587\u4EF6\u5B9A\u4E49\uFF0C\u628A\u5B83\u89E3\u6790\u6210\u4E00\u4E2A\u7C7B\u578B\u3002</p><ul><li><p>beans.properties</p><p>\u5077\u61D2\uFF0C\u8FD9\u91CC\u76F4\u63A5\u7528\u4E86\u6700\u65B9\u4FBF\u89E3\u6790\u7684 properties\uFF0C\u8FD9\u91CC\u76F4\u63A5\u7528\u4E00\u4E2A<code>&lt;key,value&gt;</code>\u7C7B\u578B\u7684\u914D\u7F6E\u6765\u4EE3\u8868 Bean \u7684\u5B9A\u4E49\uFF0C\u5176\u4E2D key \u662F beanName\uFF0Cvalue \u662F class</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>userDao<span class="token operator">:</span><span class="token class-name"><span class="token namespace">cn<span class="token punctuation">.</span>fighter3<span class="token punctuation">.</span>bean<span class="token punctuation">.</span></span>UserDao</span>
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2022年05月31日  
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div></li><li><p>BeanDefinition.java</p><p>bean \u5B9A\u4E49\u7C7B\uFF0C\u914D\u7F6E\u6587\u4EF6\u4E2D bean \u5B9A\u4E49\u5BF9\u5E94\u7684\u5B9E\u4F53</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BeanDefinition</span> <span class="token punctuation">{</span>

    <span class="token keyword">private</span> <span class="token class-name">String</span> beanName<span class="token punctuation">;</span>

    <span class="token keyword">private</span> <span class="token class-name">Class</span> beanClass<span class="token punctuation">;</span>
     <span class="token comment">//\u7701\u7565getter\u3001setter</span>
 <span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>ResourceLoader.java</p><p>\u8D44\u6E90\u52A0\u8F7D\u5668\uFF0C\u7528\u6765\u5B8C\u6210\u914D\u7F6E\u6587\u4EF6\u4E2D\u914D\u7F6E\u7684\u52A0\u8F7D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ResourceLoader</span> <span class="token punctuation">{</span>

    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">BeanDefinition</span><span class="token punctuation">&gt;</span></span> <span class="token function">getResource</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">BeanDefinition</span><span class="token punctuation">&gt;</span></span> beanDefinitionMap <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HashMap</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token number">16</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token class-name">Properties</span> properties <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Properties</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">try</span> <span class="token punctuation">{</span>
            <span class="token class-name">InputStream</span> inputStream <span class="token operator">=</span> <span class="token class-name">ResourceLoader</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">.</span><span class="token function">getResourceAsStream</span><span class="token punctuation">(</span><span class="token string">&quot;/beans.properties&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            properties<span class="token punctuation">.</span><span class="token function">load</span><span class="token punctuation">(</span>inputStream<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> it <span class="token operator">=</span> properties<span class="token punctuation">.</span><span class="token function">stringPropertyNames</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">while</span> <span class="token punctuation">(</span>it<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                <span class="token class-name">String</span> key <span class="token operator">=</span> it<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                <span class="token class-name">String</span> className <span class="token operator">=</span> properties<span class="token punctuation">.</span><span class="token function">getProperty</span><span class="token punctuation">(</span>key<span class="token punctuation">)</span><span class="token punctuation">;</span>
                <span class="token class-name">BeanDefinition</span> beanDefinition <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">BeanDefinition</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                beanDefinition<span class="token punctuation">.</span><span class="token function">setBeanName</span><span class="token punctuation">(</span>key<span class="token punctuation">)</span><span class="token punctuation">;</span>
                <span class="token class-name">Class</span> clazz <span class="token operator">=</span> <span class="token class-name">Class</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span>className<span class="token punctuation">)</span><span class="token punctuation">;</span>
                beanDefinition<span class="token punctuation">.</span><span class="token function">setBeanClass</span><span class="token punctuation">(</span>clazz<span class="token punctuation">)</span><span class="token punctuation">;</span>
                beanDefinitionMap<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>key<span class="token punctuation">,</span> beanDefinition<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
            inputStream<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> <span class="token operator">|</span> <span class="token class-name">ClassNotFoundException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token keyword">return</span> beanDefinitionMap<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>BeanRegister.java</p><p>\u5BF9\u8C61\u6CE8\u518C\u5668\uFF0C\u8FD9\u91CC\u7528\u4E8E\u5355\u4F8B bean \u7684\u7F13\u5B58\uFF0C\u6211\u4EEC\u5927\u5E45\u7B80\u5316\uFF0C\u9ED8\u8BA4\u6240\u6709 bean \u90FD\u662F\u5355\u4F8B\u7684\u3002\u53EF\u4EE5\u770B\u5230\u6240\u8C13\u5355\u4F8B\u6CE8\u518C\uFF0C\u4E5F\u5F88\u7B80\u5355\uFF0C\u4E0D\u8FC7\u662F\u5F80 HashMap \u91CC\u5B58\u5BF9\u8C61\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BeanRegister</span> <span class="token punctuation">{</span>

    <span class="token comment">//\u5355\u4F8BBean\u7F13\u5B58</span>
    <span class="token keyword">private</span> <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">Object</span><span class="token punctuation">&gt;</span></span> singletonMap <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HashMap</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token number">32</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token doc-comment comment">/**
     * \u83B7\u53D6\u5355\u4F8BBean
     *
     * <span class="token keyword">@param</span> <span class="token parameter">beanName</span> bean\u540D\u79F0
     * <span class="token keyword">@return</span>
     */</span>
    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">getSingletonBean</span><span class="token punctuation">(</span><span class="token class-name">String</span> beanName<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">return</span> singletonMap<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>beanName<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token doc-comment comment">/**
     * \u6CE8\u518C\u5355\u4F8Bbean
     *
     * <span class="token keyword">@param</span> <span class="token parameter">beanName</span>
     * <span class="token keyword">@param</span> <span class="token parameter">bean</span>
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">registerSingletonBean</span><span class="token punctuation">(</span><span class="token class-name">String</span> beanName<span class="token punctuation">,</span> <span class="token class-name">Object</span> bean<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">if</span> <span class="token punctuation">(</span>singletonMap<span class="token punctuation">.</span><span class="token function">containsKey</span><span class="token punctuation">(</span>beanName<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">return</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        singletonMap<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>beanName<span class="token punctuation">,</span> bean<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p><strong>BeanFactory.java</strong></p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-c6b3b707-cf53-4c7c-a6f9-8560950806fc.png" alt="BeanFactory"></p><ul><li><p>\u5BF9\u8C61\u5DE5\u5382\uFF0C\u6211\u4EEC\u6700<strong>\u6838\u5FC3</strong>\u7684\u4E00\u4E2A\u7C7B\uFF0C\u5728\u5B83\u521D\u59CB\u5316\u7684\u65F6\u5019\uFF0C\u521B\u5EFA\u4E86 bean \u6CE8\u518C\u5668\uFF0C\u5B8C\u6210\u4E86\u8D44\u6E90\u7684\u52A0\u8F7D\u3002</p></li><li><p>\u83B7\u53D6 bean \u7684\u65F6\u5019\uFF0C\u5148\u4ECE\u5355\u4F8B\u7F13\u5B58\u4E2D\u53D6\uFF0C\u5982\u679C\u6CA1\u6709\u53D6\u5230\uFF0C\u5C31\u521B\u5EFA\u5E76\u6CE8\u518C\u4E00\u4E2A bean</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BeanFactory</span> <span class="token punctuation">{</span>

    <span class="token keyword">private</span> <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">BeanDefinition</span><span class="token punctuation">&gt;</span></span> beanDefinitionMap <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HashMap</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token keyword">private</span> <span class="token class-name">BeanRegister</span> beanRegister<span class="token punctuation">;</span>

    <span class="token keyword">public</span> <span class="token class-name">BeanFactory</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">//\u521B\u5EFAbean\u6CE8\u518C\u5668</span>
        beanRegister <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">BeanRegister</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//\u52A0\u8F7D\u8D44\u6E90</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>beanDefinitionMap <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ResourceLoader</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getResource</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token doc-comment comment">/**
     * \u83B7\u53D6bean
     *
     * <span class="token keyword">@param</span> <span class="token parameter">beanName</span> bean\u540D\u79F0
     * <span class="token keyword">@return</span>
     */</span>
    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">getBean</span><span class="token punctuation">(</span><span class="token class-name">String</span> beanName<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">//\u4ECEbean\u7F13\u5B58\u4E2D\u53D6</span>
        <span class="token class-name">Object</span> bean <span class="token operator">=</span> beanRegister<span class="token punctuation">.</span><span class="token function">getSingletonBean</span><span class="token punctuation">(</span>beanName<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">if</span> <span class="token punctuation">(</span>bean <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">return</span> bean<span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token comment">//\u6839\u636Ebean\u5B9A\u4E49\uFF0C\u521B\u5EFAbean</span>
        <span class="token keyword">return</span> <span class="token function">createBean</span><span class="token punctuation">(</span>beanDefinitionMap<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>beanName<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token doc-comment comment">/**
     * \u521B\u5EFABean
     *
     * <span class="token keyword">@param</span> <span class="token parameter">beanDefinition</span> bean\u5B9A\u4E49
     * <span class="token keyword">@return</span>
     */</span>
    <span class="token keyword">private</span> <span class="token class-name">Object</span> <span class="token function">createBean</span><span class="token punctuation">(</span><span class="token class-name">BeanDefinition</span> beanDefinition<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">try</span> <span class="token punctuation">{</span>
            <span class="token class-name">Object</span> bean <span class="token operator">=</span> beanDefinition<span class="token punctuation">.</span><span class="token function">getBeanClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">newInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token comment">//\u7F13\u5B58bean</span>
            beanRegister<span class="token punctuation">.</span><span class="token function">registerSingletonBean</span><span class="token punctuation">(</span>beanDefinition<span class="token punctuation">.</span><span class="token function">getBeanName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> bean<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">return</span> bean<span class="token punctuation">;</span>
        <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">InstantiationException</span> <span class="token operator">|</span> <span class="token class-name">IllegalAccessException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u6D4B\u8BD5</p><ul><li><p>UserDao.java</p><p>\u6211\u4EEC\u7684 Bean \u7C7B\uFF0C\u5F88\u7B80\u5355</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">UserDao</span> <span class="token punctuation">{</span>

    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">queryUserInfo</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;A good man.&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u5355\u5143\u6D4B\u8BD5</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ApiTest</span> <span class="token punctuation">{</span>
    <span class="token annotation punctuation">@Test</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">test_BeanFactory</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">//1.\u521B\u5EFAbean\u5DE5\u5382(\u540C\u65F6\u5B8C\u6210\u4E86\u52A0\u8F7D\u8D44\u6E90\u3001\u521B\u5EFA\u6CE8\u518C\u5355\u4F8Bbean\u6CE8\u518C\u5668\u7684\u64CD\u4F5C)</span>
        <span class="token class-name">BeanFactory</span> beanFactory <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">BeanFactory</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

        <span class="token comment">//2.\u7B2C\u4E00\u6B21\u83B7\u53D6bean\uFF08\u901A\u8FC7\u53CD\u5C04\u521B\u5EFAbean\uFF0C\u7F13\u5B58bean\uFF09</span>
        <span class="token class-name">UserDao</span> userDao1 <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">UserDao</span><span class="token punctuation">)</span> beanFactory<span class="token punctuation">.</span><span class="token function">getBean</span><span class="token punctuation">(</span><span class="token string">&quot;userDao&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        userDao1<span class="token punctuation">.</span><span class="token function">queryUserInfo</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

        <span class="token comment">//3.\u7B2C\u4E8C\u6B21\u83B7\u53D6bean\uFF08\u4ECE\u7F13\u5B58\u4E2D\u83B7\u53D6bean\uFF09</span>
        <span class="token class-name">UserDao</span> userDao2 <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">UserDao</span><span class="token punctuation">)</span> beanFactory<span class="token punctuation">.</span><span class="token function">getBean</span><span class="token punctuation">(</span><span class="token string">&quot;userDao&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        userDao2<span class="token punctuation">.</span><span class="token function">queryUserInfo</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u8FD0\u884C\u7ED3\u679C</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">A</span> good <span class="token class-name"><span class="token namespace">man<span class="token punctuation">.</span></span>
A</span> good man<span class="token punctuation">.</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div></li></ul></li></ul><p>\u81F3\u6B64\uFF0C\u6211\u4EEC\u4E00\u4E2A\u4E5E\u4E10+\u7834\u8239\u7248\u7684 Spring \u5C31\u5B8C\u6210\u4E86\uFF0C\u4EE3\u7801\u4E5F\u6BD4\u8F83\u5B8C\u6574\uFF0C\u6709\u6761\u4EF6\u7684\u53EF\u4EE5\u8DD1\u4E00\u4E0B\u3002</p><p>PS:\u56E0\u4E3A\u65F6\u95F4+\u7BC7\u5E45\u7684\u9650\u5236\uFF0C\u8FD9\u4E2A demo \u6BD4\u8F83\u7B80\u964B\uFF0C\u6CA1\u6709\u9762\u5411\u63A5\u53E3\u3001\u6CA1\u6709\u89E3\u8026\u3001\u8FB9\u754C\u68C0\u67E5\u3001\u5F02\u5E38\u5904\u7406\u2026\u2026\u5065\u58EE\u6027\u3001\u6269\u5C55\u6027\u90FD\u6709\u5F88\u5927\u7684\u4E0D\u8DB3\uFF0C\u611F\u5174\u8DA3\u53EF\u4EE5\u5B66\u4E60\u53C2\u8003[15]\u3002</p><h3 id="_7-\u8BF4\u8BF4-beanfactory-\u548C-applicantcontext" tabindex="-1"><a class="header-anchor" href="#_7-\u8BF4\u8BF4-beanfactory-\u548C-applicantcontext" aria-hidden="true">#</a> 7.\u8BF4\u8BF4 BeanFactory \u548C ApplicantContext?</h3><p>\u53EF\u4EE5\u8FD9\u4E48\u5F62\u5BB9\uFF0CBeanFactory \u662F Spring \u7684\u201C\u5FC3\u810F\u201D\uFF0CApplicantContext \u662F\u5B8C\u6574\u7684\u201C\u8EAB\u8EAF\u201D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-66328446-f89f-4b7a-8d9f-0e1145dd9b2f.png" alt="BeanFactory\u548CApplicantContext\u7684\u6BD4\u55BB"></p><ul><li>BeanFactory\uFF08Bean \u5DE5\u5382\uFF09\u662F Spring \u6846\u67B6\u7684\u57FA\u7840\u8BBE\u65BD\uFF0C\u9762\u5411 Spring \u672C\u8EAB\u3002</li><li>ApplicantContext\uFF08\u5E94\u7528\u4E0A\u4E0B\u6587\uFF09\u5EFA\u7ACB\u5728 BeanFactoty \u57FA\u7840\u4E0A\uFF0C\u9762\u5411\u4F7F\u7528 Spring \u6846\u67B6\u7684\u5F00\u53D1\u8005\u3002</li></ul><h6 id="beanfactory-\u63A5\u53E3" tabindex="-1"><a class="header-anchor" href="#beanfactory-\u63A5\u53E3" aria-hidden="true">#</a> BeanFactory \u63A5\u53E3</h6><p>BeanFactory \u662F\u7C7B\u7684\u901A\u7528\u5DE5\u5382\uFF0C\u53EF\u4EE5\u521B\u5EFA\u5E76\u7BA1\u7406\u5404\u79CD\u7C7B\u7684\u5BF9\u8C61\u3002</p><p>Spring \u4E3A BeanFactory \u63D0\u4F9B\u4E86\u5F88\u591A\u79CD\u5B9E\u73B0\uFF0C\u6700\u5E38\u7528\u7684\u662F XmlBeanFactory\uFF0C\u4F46\u5728 Spring 3.2 \u4E2D\u5DF2\u88AB\u5E9F\u5F03\uFF0C\u5EFA\u8BAE\u4F7F\u7528 XmlBeanDefinitionReader\u3001DefaultListableBeanFactory\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-6e6d4b69-f36c-41e6-b8ba-9277be147c9b.png" alt="Spring5 BeanFactory\u7EE7\u627F\u4F53\u7CFB"></p><p>BeanFactory \u63A5\u53E3\u4F4D\u4E8E\u7C7B\u7ED3\u6784\u6811\u7684\u9876\u7AEF\uFF0C\u5B83\u6700\u4E3B\u8981\u7684\u65B9\u6CD5\u5C31\u662F getBean(String var1)\uFF0C\u8FD9\u4E2A\u65B9\u6CD5\u4ECE\u5BB9\u5668\u4E2D\u8FD4\u56DE\u7279\u5B9A\u540D\u79F0\u7684 Bean\u3002</p><p>BeanFactory \u7684\u529F\u80FD\u901A\u8FC7\u5176\u5B83\u7684\u63A5\u53E3\u5F97\u5230\u4E86\u4E0D\u65AD\u7684\u6269\u5C55\uFF0C\u6BD4\u5982 AbstractAutowireCapableBeanFactory \u5B9A\u4E49\u4E86\u5C06\u5BB9\u5668\u4E2D\u7684 Bean \u6309\u7167\u67D0\u79CD\u89C4\u5219\uFF08\u6BD4\u5982\u6309\u540D\u5B57\u5339\u914D\u3001\u6309\u7C7B\u578B\u5339\u914D\u7B49\uFF09\u8FDB\u884C\u81EA\u52A8\u88C5\u914D\u7684\u65B9\u6CD5\u3002</p><p>\u8FD9\u91CC\u770B\u4E00\u4E2A XMLBeanFactory\uFF08\u5DF2\u8FC7\u671F\uFF09 \u83B7\u53D6 bean \u7684\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorldApp</span><span class="token punctuation">{</span>
   <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token class-name">BeanFactory</span> factory <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">XmlBeanFactory</span> <span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">ClassPathResource</span><span class="token punctuation">(</span><span class="token string">&quot;beans.xml&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
      <span class="token class-name">HelloWorld</span> obj <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">HelloWorld</span><span class="token punctuation">)</span> factory<span class="token punctuation">.</span><span class="token function">getBean</span><span class="token punctuation">(</span><span class="token string">&quot;helloWorld&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
      obj<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h6 id="applicationcontext-\u63A5\u53E3" tabindex="-1"><a class="header-anchor" href="#applicationcontext-\u63A5\u53E3" aria-hidden="true">#</a> ApplicationContext \u63A5\u53E3</h6><p>ApplicationContext \u7531 BeanFactory \u6D3E\u751F\u800C\u6765\uFF0C\u63D0\u4F9B\u4E86\u66F4\u591A\u9762\u5411\u5B9E\u9645\u5E94\u7528\u7684\u529F\u80FD\u3002\u53EF\u4EE5\u8FD9\u4E48\u8BF4\uFF0C\u4F7F\u7528 BeanFactory \u5C31\u662F\u624B\u52A8\u6863\uFF0C\u4F7F\u7528 ApplicationContext \u5C31\u662F\u81EA\u52A8\u6863\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-e201c9a3-f23c-4768-b844-ac7e0ba4bcec.png" alt="Spring5 ApplicationContext\u90E8\u5206\u4F53\u7CFB\u7C7B\u56FE"></p><p>ApplicationContext \u7EE7\u627F\u4E86 HierachicalBeanFactory \u548C ListableBeanFactory \u63A5\u53E3\uFF0C\u5728\u6B64\u57FA\u7840\u4E0A\uFF0C\u8FD8\u901A\u8FC7\u5176\u4ED6\u7684\u63A5\u53E3\u6269\u5C55\u4E86 BeanFactory \u7684\u529F\u80FD\uFF0C\u5305\u62EC\uFF1A</p><ul><li><p>Bean instantiation/wiring</p></li><li><p>Bean \u7684\u5B9E\u4F8B\u5316/\u4E32\u8054</p></li><li><p>\u81EA\u52A8\u7684 BeanPostProcessor \u6CE8\u518C</p></li><li><p>\u81EA\u52A8\u7684 BeanFactoryPostProcessor \u6CE8\u518C</p></li><li><p>\u65B9\u4FBF\u7684 MessageSource \u8BBF\u95EE\uFF08i18n\uFF09</p></li><li><p>ApplicationEvent \u7684\u53D1\u5E03\u4E0E BeanFactory \u61D2\u52A0\u8F7D\u7684\u65B9\u5F0F\u4E0D\u540C\uFF0C\u5B83\u662F\u9884\u52A0\u8F7D\uFF0C\u6240\u4EE5\uFF0C\u6BCF\u4E00\u4E2A bean \u90FD\u5728 ApplicationContext \u542F\u52A8\u4E4B\u540E\u5B9E\u4F8B\u5316</p></li></ul><p>\u8FD9\u662F ApplicationContext \u7684\u4F7F\u7528\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorldApp</span><span class="token punctuation">{</span>
   <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token class-name">ApplicationContext</span> context<span class="token operator">=</span><span class="token keyword">new</span> <span class="token class-name">ClassPathXmlApplicationContext</span><span class="token punctuation">(</span><span class="token string">&quot;beans.xml&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
      <span class="token class-name">HelloWorld</span> obj <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">HelloWorld</span><span class="token punctuation">)</span> context<span class="token punctuation">.</span><span class="token function">getBean</span><span class="token punctuation">(</span><span class="token string">&quot;helloWorld&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
      obj<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>ApplicationContext \u5305\u542B BeanFactory \u7684\u6240\u6709\u7279\u6027\uFF0C\u901A\u5E38\u63A8\u8350\u4F7F\u7528\u524D\u8005\u3002</p><h3 id="_8-\u4F60\u77E5\u9053-spring-\u5BB9\u5668\u542F\u52A8\u9636\u6BB5\u4F1A\u5E72\u4EC0\u4E48\u5417" tabindex="-1"><a class="header-anchor" href="#_8-\u4F60\u77E5\u9053-spring-\u5BB9\u5668\u542F\u52A8\u9636\u6BB5\u4F1A\u5E72\u4EC0\u4E48\u5417" aria-hidden="true">#</a> 8.\u4F60\u77E5\u9053 Spring \u5BB9\u5668\u542F\u52A8\u9636\u6BB5\u4F1A\u5E72\u4EC0\u4E48\u5417\uFF1F</h3><p>PS\uFF1A\u8FD9\u9053\u9898\u8001\u4E09\u9762\u8BD5\u88AB\u95EE\u5230\u8FC7</p><p>Spring \u7684 IOC \u5BB9\u5668\u5DE5\u4F5C\u7684\u8FC7\u7A0B\uFF0C\u5176\u5B9E\u53EF\u4EE5\u5212\u5206\u4E3A\u4E24\u4E2A\u9636\u6BB5\uFF1A<strong>\u5BB9\u5668\u542F\u52A8\u9636\u6BB5</strong>\u548C<strong>Bean \u5B9E\u4F8B\u5316\u9636\u6BB5</strong>\u3002</p><p>\u5176\u4E2D\u5BB9\u5668\u542F\u52A8\u9636\u6BB5\u4E3B\u8981\u505A\u7684\u5DE5\u4F5C\u662F\u52A0\u8F7D\u548C\u89E3\u6790\u914D\u7F6E\u6587\u4EF6\uFF0C\u4FDD\u5B58\u5230\u5BF9\u5E94\u7684 Bean \u5B9A\u4E49\u4E2D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-8f8103f7-2a51-4858-856e-96a4ac400d76.png" alt="\u5BB9\u5668\u542F\u52A8\u548CBean\u5B9E\u4F8B\u5316\u9636\u6BB5"></p><p>\u5BB9\u5668\u542F\u52A8\u5F00\u59CB\uFF0C\u9996\u5148\u4F1A\u901A\u8FC7\u67D0\u79CD\u9014\u5F84\u52A0\u8F7D Congiguration MetaData\uFF0C\u5728\u5927\u90E8\u5206\u60C5\u51B5\u4E0B\uFF0C\u5BB9\u5668\u9700\u8981\u4F9D\u8D56\u67D0\u4E9B\u5DE5\u5177\u7C7B\uFF08BeanDefinitionReader\uFF09\u5BF9\u52A0\u8F7D\u7684 Congiguration MetaData \u8FDB\u884C\u89E3\u6790\u548C\u5206\u6790\uFF0C\u5E76\u5C06\u5206\u6790\u540E\u7684\u4FE1\u606F\u7EC4\u4E3A\u76F8\u5E94\u7684 BeanDefinition\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-dfb3d8c4-ba8d-4a2c-aef2-4ad425f7180c.png" alt="xml\u914D\u7F6E\u4FE1\u606F\u6620\u5C04\u6CE8\u518C\u8FC7\u7A0B"></p><p>\u6700\u540E\u628A\u8FD9\u4E9B\u4FDD\u5B58\u4E86 Bean \u5B9A\u4E49\u5FC5\u8981\u4FE1\u606F\u7684 BeanDefinition\uFF0C\u6CE8\u518C\u5230\u76F8\u5E94\u7684 BeanDefinitionRegistry\uFF0C\u8FD9\u6837\u5BB9\u5668\u542F\u52A8\u5C31\u5B8C\u6210\u4E86\u3002</p><h3 id="_9-\u80FD\u8BF4\u4E00\u4E0B-spring-bean-\u751F\u547D\u5468\u671F\u5417" tabindex="-1"><a class="header-anchor" href="#_9-\u80FD\u8BF4\u4E00\u4E0B-spring-bean-\u751F\u547D\u5468\u671F\u5417" aria-hidden="true">#</a> 9.\u80FD\u8BF4\u4E00\u4E0B Spring Bean \u751F\u547D\u5468\u671F\u5417\uFF1F</h3>`,96),y=n("\u53EF\u4EE5\u770B\u770B\uFF1A"),h={href:"https://mp.weixin.qq.com/s/zb6eA3Se0gQoqL8PylCPLw",target:"_blank",rel:"noopener noreferrer"},w=n("Spring Bean \u751F\u547D\u5468\u671F\uFF0C\u597D\u50CF\u4EBA\u7684\u4E00\u751F\u3002\u3002"),S=e(`<p>\u5728 Spring \u4E2D\uFF0C\u57FA\u672C\u5BB9\u5668 BeanFactory \u548C\u6269\u5C55\u5BB9\u5668 ApplicationContext \u7684\u5B9E\u4F8B\u5316\u65F6\u673A\u4E0D\u592A\u4E00\u6837\uFF0CBeanFactory \u91C7\u7528\u7684\u662F\u5EF6\u8FDF\u521D\u59CB\u5316\u7684\u65B9\u5F0F\uFF0C\u4E5F\u5C31\u662F\u53EA\u6709\u5728\u7B2C\u4E00\u6B21 getBean()\u7684\u65F6\u5019\uFF0C\u624D\u4F1A\u5B9E\u4F8B\u5316 Bean\uFF1BApplicationContext \u542F\u52A8\u4E4B\u540E\u4F1A\u5B9E\u4F8B\u5316\u6240\u6709\u7684 Bean \u5B9A\u4E49\u3002</p><p>Spring IOC \u4E2D Bean \u7684\u751F\u547D\u5468\u671F\u5927\u81F4\u5206\u4E3A\u56DB\u4E2A\u9636\u6BB5\uFF1A<strong>\u5B9E\u4F8B\u5316</strong>\uFF08Instantiation\uFF09\u3001<strong>\u5C5E\u6027\u8D4B\u503C</strong>\uFF08Populate\uFF09\u3001<strong>\u521D\u59CB\u5316</strong>\uFF08Initialization\uFF09\u3001<strong>\u9500\u6BC1</strong>\uFF08Destruction\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-595fce5b-36cb-4dcb-b08c-8205a1e98d8a.png" alt="Bean\u751F\u547D\u5468\u671F\u56DB\u4E2A\u9636\u6BB5"></p><p>\u6211\u4EEC\u518D\u6765\u770B\u4E00\u4E2A\u7A0D\u5FAE\u8BE6\u7EC6\u4E00\u4E9B\u7684\u8FC7\u7A0B\uFF1A</p><ul><li><strong>\u5B9E\u4F8B\u5316</strong>\uFF1A\u7B2C 1 \u6B65\uFF0C\u5B9E\u4F8B\u5316\u4E00\u4E2A Bean \u5BF9\u8C61</li><li><strong>\u5C5E\u6027\u8D4B\u503C</strong>\uFF1A\u7B2C 2 \u6B65\uFF0C\u4E3A Bean \u8BBE\u7F6E\u76F8\u5173\u5C5E\u6027\u548C\u4F9D\u8D56</li><li><strong>\u521D\u59CB\u5316</strong>\uFF1A\u521D\u59CB\u5316\u7684\u9636\u6BB5\u7684\u6B65\u9AA4\u6BD4\u8F83\u591A\uFF0C5\u30016 \u6B65\u662F\u771F\u6B63\u7684\u521D\u59CB\u5316\uFF0C\u7B2C 3\u30014 \u6B65\u4E3A\u5728\u521D\u59CB\u5316\u524D\u6267\u884C\uFF0C\u7B2C 7 \u6B65\u5728\u521D\u59CB\u5316\u540E\u6267\u884C\uFF0C\u521D\u59CB\u5316\u5B8C\u6210\u4E4B\u540E\uFF0CBean \u5C31\u53EF\u4EE5\u88AB\u4F7F\u7528\u4E86</li><li><strong>\u9500\u6BC1</strong>\uFF1A\u7B2C 8~10 \u6B65\uFF0C\u7B2C 8 \u6B65\u5176\u5B9E\u4E5F\u53EF\u4EE5\u7B97\u5230\u9500\u6BC1\u9636\u6BB5\uFF0C\u4F46\u4E0D\u662F\u771F\u6B63\u610F\u4E49\u4E0A\u7684\u9500\u6BC1\uFF0C\u800C\u662F\u5148\u5728\u4F7F\u7528\u524D\u6CE8\u518C\u4E86\u9500\u6BC1\u7684\u76F8\u5173\u8C03\u7528\u63A5\u53E3\uFF0C\u4E3A\u4E86\u540E\u9762\u7B2C 9\u300110 \u6B65\u771F\u6B63\u9500\u6BC1 Bean \u65F6\u518D\u6267\u884C\u76F8\u5E94\u7684\u65B9\u6CD5</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-942a927a-86e4-4a01-8f52-9addd89642ff.png" alt="SpringBean\u751F\u547D\u5468\u671F"></p><p>\u7B80\u5355\u603B\u7ED3\u4E00\u4E0B\uFF0CBean \u751F\u547D\u5468\u671F\u91CC\u521D\u59CB\u5316\u7684\u8FC7\u7A0B\u76F8\u5BF9\u6B65\u9AA4\u4F1A\u591A\u4E00\u4E9B\uFF0C\u6BD4\u5982\u524D\u7F6E\u3001\u540E\u7F6E\u7684\u5904\u7406\u3002</p><p>\u6700\u540E\u901A\u8FC7\u4E00\u4E2A\u5B9E\u4F8B\u6765\u770B\u4E00\u4E0B\u5177\u4F53\u7684\u7EC6\u8282\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-a3b7714e-38f2-433d-97c6-acb1d20f2887.png" alt="Bean\u4E00\u751F\u5B9E\u4F8B"></p><ul><li>\u5B9A\u4E49\u4E00\u4E2A<code>PersonBean</code>\u7C7B\uFF0C\u5B9E\u73B0<code>DisposableBean</code>,<code>InitializingBean</code>, <code>BeanFactoryAware</code>, <code>BeanNameAware</code>\u8FD9 4 \u4E2A\u63A5\u53E3\uFF0C\u540C\u65F6\u8FD8\u6709\u81EA\u5B9A\u4E49\u7684<code>init-method</code>\u548C<code>destroy-method</code>\u3002</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">PersonBean</span> <span class="token keyword">implements</span> <span class="token class-name">InitializingBean</span><span class="token punctuation">,</span> <span class="token class-name">BeanFactoryAware</span><span class="token punctuation">,</span> <span class="token class-name">BeanNameAware</span><span class="token punctuation">,</span> <span class="token class-name">DisposableBean</span> <span class="token punctuation">{</span>

    <span class="token doc-comment comment">/**
     * \u8EAB\u4EFD\u8BC1\u53F7
     */</span>
    <span class="token keyword">private</span> <span class="token class-name">Integer</span> no<span class="token punctuation">;</span>

    <span class="token doc-comment comment">/**
     * \u59D3\u540D
     */</span>
    <span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>

    <span class="token keyword">public</span> <span class="token class-name">PersonBean</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;1.\u8C03\u7528\u6784\u9020\u65B9\u6CD5\uFF1A\u6211\u51FA\u751F\u4E86\uFF01&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">public</span> <span class="token class-name">Integer</span> <span class="token function">getNo</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">return</span> no<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setNo</span><span class="token punctuation">(</span><span class="token class-name">Integer</span> no<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>no <span class="token operator">=</span> no<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">public</span> <span class="token class-name">String</span> <span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">return</span> name<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setName</span><span class="token punctuation">(</span><span class="token class-name">String</span> name<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>name <span class="token operator">=</span> name<span class="token punctuation">;</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;2.\u8BBE\u7F6E\u5C5E\u6027\uFF1A\u6211\u7684\u540D\u5B57\u53EB&quot;</span><span class="token operator">+</span>name<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setBeanName</span><span class="token punctuation">(</span><span class="token class-name">String</span> s<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;3.\u8C03\u7528BeanNameAware#setBeanName\u65B9\u6CD5:\u6211\u8981\u4E0A\u5B66\u4E86\uFF0C\u8D77\u4E86\u4E2A\u5B66\u540D&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setBeanFactory</span><span class="token punctuation">(</span><span class="token class-name">BeanFactory</span> beanFactory<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">BeansException</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;4.\u8C03\u7528BeanFactoryAware#setBeanFactory\u65B9\u6CD5\uFF1A\u9009\u597D\u5B66\u6821\u4E86&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">afterPropertiesSet</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;6.InitializingBean#afterPropertiesSet\u65B9\u6CD5\uFF1A\u5165\u5B66\u767B\u8BB0&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">init</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;7.\u81EA\u5B9A\u4E49init\u65B9\u6CD5\uFF1A\u52AA\u529B\u4E0A\u5B66ing&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">destroy</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;9.DisposableBean#destroy\u65B9\u6CD5\uFF1A\u5E73\u6DE1\u7684\u4E00\u751F\u843D\u5E55\u4E86&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">destroyMethod</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;10.\u81EA\u5B9A\u4E49destroy\u65B9\u6CD5:\u7761\u4E86\uFF0C\u522B\u60F3\u53EB\u9192\u6211&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">work</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;Bean\u4F7F\u7528\u4E2D\uFF1A\u5DE5\u4F5C\uFF0C\u53EA\u6709\u5BF9\u793E\u4F1A\u6CA1\u6709\u7528\u7684\u4EBA\u624D\u653E\u5047\u3002\u3002&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>\u5B9A\u4E49\u4E00\u4E2A<code>MyBeanPostProcessor</code>\u5B9E\u73B0<code>BeanPostProcessor</code>\u63A5\u53E3\u3002</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">MyBeanPostProcessor</span> <span class="token keyword">implements</span> <span class="token class-name">BeanPostProcessor</span> <span class="token punctuation">{</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">postProcessBeforeInitialization</span><span class="token punctuation">(</span><span class="token class-name">Object</span> bean<span class="token punctuation">,</span> <span class="token class-name">String</span> beanName<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">BeansException</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;5.BeanPostProcessor.postProcessBeforeInitialization\u65B9\u6CD5\uFF1A\u5230\u5B66\u6821\u62A5\u540D\u5566&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">return</span> bean<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">postProcessAfterInitialization</span><span class="token punctuation">(</span><span class="token class-name">Object</span> bean<span class="token punctuation">,</span> <span class="token class-name">String</span> beanName<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">BeansException</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;8.BeanPostProcessor#postProcessAfterInitialization\u65B9\u6CD5\uFF1A\u7EC8\u4E8E\u6BD5\u4E1A\uFF0C\u62FF\u5230\u6BD5\u4E1A\u8BC1\u5566\uFF01&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">return</span> bean<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>\u914D\u7F6E\u6587\u4EF6\uFF0C\u6307\u5B9A<code>init-method</code>\u548C<code>destroy-method</code>\u5C5E\u6027</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token operator">&lt;</span><span class="token operator">?</span>xml version<span class="token operator">=</span><span class="token string">&quot;1.0&quot;</span> encoding<span class="token operator">=</span><span class="token string">&quot;UTF-8&quot;</span><span class="token operator">?</span><span class="token operator">&gt;</span>
<span class="token operator">&lt;</span>beans xmlns<span class="token operator">=</span><span class="token string">&quot;http://www.springframework.org/schema/beans&quot;</span>
       xmlns<span class="token operator">:</span>xsi<span class="token operator">=</span><span class="token string">&quot;http://www.w3.org/2001/XMLSchema-instance&quot;</span>
       xsi<span class="token operator">:</span>schemaLocation<span class="token operator">=</span><span class="token string">&quot;http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd&quot;</span><span class="token operator">&gt;</span>

    <span class="token operator">&lt;</span>bean name<span class="token operator">=</span><span class="token string">&quot;myBeanPostProcessor&quot;</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">&quot;cn.fighter3.spring.life.MyBeanPostProcessor&quot;</span> <span class="token operator">/</span><span class="token operator">&gt;</span>
    <span class="token operator">&lt;</span>bean name<span class="token operator">=</span><span class="token string">&quot;personBean&quot;</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">&quot;cn.fighter3.spring.life.PersonBean&quot;</span>
          init<span class="token operator">-</span>method<span class="token operator">=</span><span class="token string">&quot;init&quot;</span> destroy<span class="token operator">-</span>method<span class="token operator">=</span><span class="token string">&quot;destroyMethod&quot;</span><span class="token operator">&gt;</span>
        <span class="token operator">&lt;</span>property name<span class="token operator">=</span><span class="token string">&quot;idNo&quot;</span> value<span class="token operator">=</span> <span class="token string">&quot;80669865&quot;</span><span class="token operator">/</span><span class="token operator">&gt;</span>
        <span class="token operator">&lt;</span>property name<span class="token operator">=</span><span class="token string">&quot;name&quot;</span> value<span class="token operator">=</span><span class="token string">&quot;\u5F20\u94C1\u94A2&quot;</span> <span class="token operator">/</span><span class="token operator">&gt;</span>
    <span class="token operator">&lt;</span><span class="token operator">/</span>bean<span class="token operator">&gt;</span>

<span class="token operator">&lt;</span><span class="token operator">/</span>beans<span class="token operator">&gt;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>\u6D4B\u8BD5</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Main</span> <span class="token punctuation">{</span>

    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">ApplicationContext</span> context <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ClassPathXmlApplicationContext</span><span class="token punctuation">(</span><span class="token string">&quot;spring-config.xml&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token class-name">PersonBean</span> personBean <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">PersonBean</span><span class="token punctuation">)</span> context<span class="token punctuation">.</span><span class="token function">getBean</span><span class="token punctuation">(</span><span class="token string">&quot;personBean&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        personBean<span class="token punctuation">.</span><span class="token function">work</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token class-name">ClassPathXmlApplicationContext</span><span class="token punctuation">)</span> context<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">destroy</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>\u8FD0\u884C\u7ED3\u679C\uFF1A</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token number">1.</span>\u8C03\u7528\u6784\u9020\u65B9\u6CD5\uFF1A\u6211\u51FA\u751F\u4E86\uFF01
<span class="token number">2.</span>\u8BBE\u7F6E\u5C5E\u6027\uFF1A\u6211\u7684\u540D\u5B57\u53EB\u5F20\u94C1\u94A2
<span class="token number">3.</span>\u8C03\u7528<span class="token class-name">BeanNameAware</span>#setBeanName\u65B9\u6CD5<span class="token operator">:</span>\u6211\u8981\u4E0A\u5B66\u4E86\uFF0C\u8D77\u4E86\u4E2A\u5B66\u540D
<span class="token number">4.</span>\u8C03\u7528<span class="token class-name">BeanFactoryAware</span>#setBeanFactory\u65B9\u6CD5\uFF1A\u9009\u597D\u5B66\u6821\u4E86
<span class="token number">5.</span>BeanPostProcessor#postProcessBeforeInitialization\u65B9\u6CD5\uFF1A\u5230\u5B66\u6821\u62A5\u540D\u5566
<span class="token number">6.</span>InitializingBean#afterPropertiesSet\u65B9\u6CD5\uFF1A\u5165\u5B66\u767B\u8BB0
<span class="token number">7.</span>\u81EA\u5B9A\u4E49init\u65B9\u6CD5\uFF1A\u52AA\u529B\u4E0A\u5B66ing
<span class="token number">8.</span>BeanPostProcessor#postProcessAfterInitialization\u65B9\u6CD5\uFF1A\u7EC8\u4E8E\u6BD5\u4E1A\uFF0C\u62FF\u5230\u6BD5\u4E1A\u8BC1\u5566\uFF01
<span class="token class-name">Bean</span>\u4F7F\u7528\u4E2D\uFF1A\u5DE5\u4F5C\uFF0C\u53EA\u6709\u5BF9\u793E\u4F1A\u6CA1\u6709\u7528\u7684\u4EBA\u624D\u653E\u5047\u3002\u3002
<span class="token number">9.D</span>isposableBean#destroy\u65B9\u6CD5\uFF1A\u5E73\u6DE1\u7684\u4E00\u751F\u843D\u5E55\u4E86
<span class="token number">10.</span>\u81EA\u5B9A\u4E49destroy\u65B9\u6CD5<span class="token operator">:</span>\u7761\u4E86\uFF0C\u522B\u60F3\u53EB\u9192\u6211
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5173\u4E8E\u6E90\u7801\uFF0CBean \u521B\u5EFA\u8FC7\u7A0B\u53EF\u4EE5\u67E5\u770B<code>AbstractBeanFactory#doGetBean</code>\u65B9\u6CD5\uFF0C\u5728\u8FD9\u4E2A\u65B9\u6CD5\u91CC\u53EF\u4EE5\u770B\u5230 Bean \u7684\u5B9E\u4F8B\u5316\uFF0C\u8D4B\u503C\u3001\u521D\u59CB\u5316\u7684\u8FC7\u7A0B\uFF0C\u81F3\u4E8E\u6700\u7EC8\u7684\u9500\u6BC1\uFF0C\u53EF\u4EE5\u770B\u770B<code>ConfigurableApplicationContext#close()</code>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-d2da20a3-08d0-4648-b9a3-2fff8512b159.png" alt="Bean\u751F\u547D\u5468\u671F\u6E90\u7801\u8FFD\u8E2A"></p><h3 id="_10-bean-\u5B9A\u4E49\u548C\u4F9D\u8D56\u5B9A\u4E49\u6709\u54EA\u4E9B\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#_10-bean-\u5B9A\u4E49\u548C\u4F9D\u8D56\u5B9A\u4E49\u6709\u54EA\u4E9B\u65B9\u5F0F" aria-hidden="true">#</a> 10.Bean \u5B9A\u4E49\u548C\u4F9D\u8D56\u5B9A\u4E49\u6709\u54EA\u4E9B\u65B9\u5F0F\uFF1F</h3><p>\u6709\u4E09\u79CD\u65B9\u5F0F\uFF1A<strong>\u76F4\u63A5\u7F16\u7801\u65B9\u5F0F</strong>\u3001<strong>\u914D\u7F6E\u6587\u4EF6\u65B9\u5F0F</strong>\u3001<strong>\u6CE8\u89E3\u65B9\u5F0F</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-89f0f50d-a9e4-4dec-b267-cb1a526cb340.png" alt="Bean\u4F9D\u8D56\u914D\u7F6E\u65B9\u5F0F"></p><ul><li>\u76F4\u63A5\u7F16\u7801\u65B9\u5F0F\uFF1A\u6211\u4EEC\u4E00\u822C\u63A5\u89E6\u4E0D\u5230\u76F4\u63A5\u7F16\u7801\u7684\u65B9\u5F0F\uFF0C\u4F46\u5176\u5B9E\u5176\u5B83\u7684\u65B9\u5F0F\u6700\u7EC8\u90FD\u8981\u901A\u8FC7\u76F4\u63A5\u7F16\u7801\u6765\u5B9E\u73B0\u3002</li><li>\u914D\u7F6E\u6587\u4EF6\u65B9\u5F0F\uFF1A\u901A\u8FC7 xml\u3001propreties \u7C7B\u578B\u7684\u914D\u7F6E\u6587\u4EF6\uFF0C\u914D\u7F6E\u76F8\u5E94\u7684\u4F9D\u8D56\u5173\u7CFB\uFF0CSpring \u8BFB\u53D6\u914D\u7F6E\u6587\u4EF6\uFF0C\u5B8C\u6210\u4F9D\u8D56\u5173\u7CFB\u7684\u6CE8\u5165\u3002</li><li>\u6CE8\u89E3\u65B9\u5F0F\uFF1A\u6CE8\u89E3\u65B9\u5F0F\u5E94\u8BE5\u662F\u6211\u4EEC\u7528\u7684\u6700\u591A\u7684\u4E00\u79CD\u65B9\u5F0F\u4E86\uFF0C\u5728\u76F8\u5E94\u7684\u5730\u65B9\u4F7F\u7528\u6CE8\u89E3\u4FEE\u9970\uFF0CSpring \u4F1A\u626B\u63CF\u6CE8\u89E3\uFF0C\u5B8C\u6210\u4F9D\u8D56\u5173\u7CFB\u7684\u6CE8\u5165\u3002</li></ul><h3 id="_11-\u6709\u54EA\u4E9B\u4F9D\u8D56\u6CE8\u5165\u7684\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#_11-\u6709\u54EA\u4E9B\u4F9D\u8D56\u6CE8\u5165\u7684\u65B9\u6CD5" aria-hidden="true">#</a> 11.\u6709\u54EA\u4E9B\u4F9D\u8D56\u6CE8\u5165\u7684\u65B9\u6CD5\uFF1F</h3><p>Spring \u652F\u6301<strong>\u6784\u9020\u65B9\u6CD5\u6CE8\u5165</strong>\u3001<strong>\u5C5E\u6027\u6CE8\u5165</strong>\u3001<strong>\u5DE5\u5382\u65B9\u6CD5\u6CE8\u5165</strong>,\u5176\u4E2D\u5DE5\u5382\u65B9\u6CD5\u6CE8\u5165\uFF0C\u53C8\u53EF\u4EE5\u5206\u4E3A<strong>\u9759\u6001\u5DE5\u5382\u65B9\u6CD5\u6CE8\u5165</strong>\u548C<strong>\u975E\u9759\u6001\u5DE5\u5382\u65B9\u6CD5\u6CE8\u5165</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-491f8444-54ba-4628-b8eb-8418a2197096.png" alt="Spring\u4F9D\u8D56\u6CE8\u5165\u65B9\u6CD5"></p><ul><li><p><strong>\u6784\u9020\u65B9\u6CD5\u6CE8\u5165</strong></p><p>\u901A\u8FC7\u8C03\u7528\u7C7B\u7684\u6784\u9020\u65B9\u6CD5\uFF0C\u5C06\u63A5\u53E3\u5B9E\u73B0\u7C7B\u901A\u8FC7\u6784\u9020\u65B9\u6CD5\u53D8\u91CF\u4F20\u5165</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code> <span class="token keyword">public</span> <span class="token class-name">CatDaoImpl</span><span class="token punctuation">(</span><span class="token class-name">String</span> message<span class="token punctuation">)</span><span class="token punctuation">{</span>
   <span class="token keyword">this</span><span class="token punctuation">.</span> message <span class="token operator">=</span> message<span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token operator">&lt;</span>bean id<span class="token operator">=</span><span class="token string">&quot;CatDaoImpl&quot;</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">&quot;com.CatDaoImpl&quot;</span><span class="token operator">&gt;</span>
  <span class="token operator">&lt;</span>constructor<span class="token operator">-</span>arg value<span class="token operator">=</span><span class="token string">&quot; message &quot;</span><span class="token operator">&gt;</span><span class="token operator">&lt;</span><span class="token operator">/</span>constructor<span class="token operator">-</span>arg<span class="token operator">&gt;</span>
<span class="token operator">&lt;</span><span class="token operator">/</span>bean<span class="token operator">&gt;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p><strong>\u5C5E\u6027\u6CE8\u5165</strong></p><p>\u901A\u8FC7 Setter \u65B9\u6CD5\u5B8C\u6210\u8C03\u7528\u7C7B\u6240\u9700\u4F9D\u8D56\u7684\u6CE8\u5165</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code> <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Id</span> <span class="token punctuation">{</span>
    <span class="token keyword">private</span> <span class="token keyword">int</span> id<span class="token punctuation">;</span>

    <span class="token keyword">public</span> <span class="token keyword">int</span> <span class="token function">getId</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">return</span> id<span class="token punctuation">;</span> <span class="token punctuation">}</span>

    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setId</span><span class="token punctuation">(</span><span class="token keyword">int</span> id<span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">this</span><span class="token punctuation">.</span>id <span class="token operator">=</span> id<span class="token punctuation">;</span> <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token operator">&lt;</span>bean id<span class="token operator">=</span><span class="token string">&quot;id&quot;</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">&quot;com.id &quot;</span><span class="token operator">&gt;</span>
  <span class="token operator">&lt;</span>property name<span class="token operator">=</span><span class="token string">&quot;id&quot;</span> value<span class="token operator">=</span><span class="token string">&quot;123&quot;</span><span class="token operator">&gt;</span><span class="token operator">&lt;</span><span class="token operator">/</span>property<span class="token operator">&gt;</span>
<span class="token operator">&lt;</span><span class="token operator">/</span>bean<span class="token operator">&gt;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p><strong>\u5DE5\u5382\u65B9\u6CD5\u6CE8\u5165</strong></p><ul><li><p><strong>\u9759\u6001\u5DE5\u5382\u6CE8\u5165</strong></p><p>\u9759\u6001\u5DE5\u5382\u987E\u540D\u601D\u4E49\uFF0C\u5C31\u662F\u901A\u8FC7\u8C03\u7528\u9759\u6001\u5DE5\u5382\u7684\u65B9\u6CD5\u6765\u83B7\u53D6\u81EA\u5DF1\u9700\u8981\u7684\u5BF9\u8C61\uFF0C\u4E3A\u4E86\u8BA9 Spring \u7BA1\u7406\u6240\u6709\u5BF9\u8C61\uFF0C\u6211\u4EEC\u4E0D\u80FD\u76F4\u63A5\u901A\u8FC7&quot;\u5DE5\u7A0B\u7C7B.\u9759\u6001\u65B9\u6CD5()&quot;\u6765\u83B7\u53D6\u5BF9\u8C61\uFF0C\u800C\u662F\u4F9D\u7136\u901A\u8FC7 Spring \u6CE8\u5165\u7684\u5F62\u5F0F\u83B7\u53D6\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">DaoFactory</span> <span class="token punctuation">{</span> <span class="token comment">//\u9759\u6001\u5DE5\u5382</span>

   <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">FactoryDao</span> <span class="token function">getStaticFactoryDaoImpl</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
      <span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">StaticFacotryDaoImpl</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">SpringAction</span> <span class="token punctuation">{</span>

 <span class="token comment">//\u6CE8\u5165\u5BF9\u8C61</span>
 <span class="token keyword">private</span> <span class="token class-name">FactoryDao</span> staticFactoryDao<span class="token punctuation">;</span>

 <span class="token comment">//\u6CE8\u5165\u5BF9\u8C61\u7684 set \u65B9\u6CD5</span>
 <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setStaticFactoryDao</span><span class="token punctuation">(</span><span class="token class-name">FactoryDao</span> staticFactoryDao<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">this</span><span class="token punctuation">.</span>staticFactoryDao <span class="token operator">=</span> staticFactoryDao<span class="token punctuation">;</span>
 <span class="token punctuation">}</span>

<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//factory-method=&quot;getStaticFactoryDaoImpl&quot;\u6307\u5B9A\u8C03\u7528\u54EA\u4E2A\u5DE5\u5382\u65B9\u6CD5</span>
 <span class="token operator">&lt;</span>bean name<span class="token operator">=</span><span class="token string">&quot;springAction&quot;</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">&quot; SpringAction&quot;</span> <span class="token operator">&gt;</span>
   <span class="token operator">&lt;</span><span class="token operator">!</span><span class="token operator">--</span>\u4F7F\u7528\u9759\u6001\u5DE5\u5382\u7684\u65B9\u6CD5\u6CE8\u5165\u5BF9\u8C61<span class="token punctuation">,</span>\u5BF9\u5E94\u4E0B\u9762\u7684\u914D\u7F6E\u6587\u4EF6<span class="token operator">--</span><span class="token operator">&gt;</span>
   <span class="token operator">&lt;</span>property name<span class="token operator">=</span><span class="token string">&quot;staticFactoryDao&quot;</span> ref<span class="token operator">=</span><span class="token string">&quot;staticFactoryDao&quot;</span><span class="token operator">&gt;</span><span class="token operator">&lt;</span><span class="token operator">/</span>property<span class="token operator">&gt;</span>
 <span class="token operator">&lt;</span><span class="token operator">/</span>bean<span class="token operator">&gt;</span>

 <span class="token operator">&lt;</span><span class="token operator">!</span><span class="token operator">--</span>\u6B64\u5904\u83B7\u53D6\u5BF9\u8C61\u7684\u65B9\u5F0F\u662F\u4ECE\u5DE5\u5382\u7C7B\u4E2D\u83B7\u53D6\u9759\u6001\u65B9\u6CD5<span class="token operator">--</span><span class="token operator">&gt;</span>
<span class="token operator">&lt;</span>bean name<span class="token operator">=</span><span class="token string">&quot;staticFactoryDao&quot;</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">&quot;DaoFactory&quot;</span>
  factory<span class="token operator">-</span>method<span class="token operator">=</span><span class="token string">&quot;getStaticFactoryDaoImpl&quot;</span><span class="token operator">&gt;</span><span class="token operator">&lt;</span><span class="token operator">/</span>bean<span class="token operator">&gt;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p><strong>\u975E\u9759\u6001\u5DE5\u5382\u6CE8\u5165</strong></p><p>\u975E\u9759\u6001\u5DE5\u5382\uFF0C\u4E5F\u53EB\u5B9E\u4F8B\u5DE5\u5382\uFF0C\u610F\u601D\u662F\u5DE5\u5382\u65B9\u6CD5\u4E0D\u662F\u9759\u6001\u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u9700\u8981\u9996\u5148 new \u4E00\u4E2A\u5DE5\u5382\u5B9E\u4F8B\uFF0C\u518D\u8C03\u7528\u666E\u901A\u7684\u5B9E\u4F8B\u65B9\u6CD5\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//\u975E\u9759\u6001\u5DE5\u5382</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">DaoFactory</span> <span class="token punctuation">{</span>
   <span class="token keyword">public</span> <span class="token class-name">FactoryDao</span> <span class="token function">getFactoryDaoImpl</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
     <span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">FactoryDaoImpl</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>

<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">SpringAction</span> <span class="token punctuation">{</span>
  <span class="token comment">//\u6CE8\u5165\u5BF9\u8C61</span>
  <span class="token keyword">private</span> <span class="token class-name">FactoryDao</span> factoryDao<span class="token punctuation">;</span>

  <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setFactoryDao</span><span class="token punctuation">(</span><span class="token class-name">FactoryDao</span> factoryDao<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>factoryDao <span class="token operator">=</span> factoryDao<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code> <span class="token operator">&lt;</span>bean name<span class="token operator">=</span><span class="token string">&quot;springAction&quot;</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">&quot;SpringAction&quot;</span><span class="token operator">&gt;</span>
   <span class="token operator">&lt;</span><span class="token operator">!</span><span class="token operator">--</span>\u4F7F\u7528\u975E\u9759\u6001\u5DE5\u5382\u7684\u65B9\u6CD5\u6CE8\u5165\u5BF9\u8C61<span class="token punctuation">,</span>\u5BF9\u5E94\u4E0B\u9762\u7684\u914D\u7F6E\u6587\u4EF6<span class="token operator">--</span><span class="token operator">&gt;</span>
   <span class="token operator">&lt;</span>property name<span class="token operator">=</span><span class="token string">&quot;factoryDao&quot;</span> ref<span class="token operator">=</span><span class="token string">&quot;factoryDao&quot;</span><span class="token operator">&gt;</span><span class="token operator">&lt;</span><span class="token operator">/</span>property<span class="token operator">&gt;</span>
 <span class="token operator">&lt;</span><span class="token operator">/</span>bean<span class="token operator">&gt;</span>

 <span class="token operator">&lt;</span><span class="token operator">!</span><span class="token operator">--</span>\u6B64\u5904\u83B7\u53D6\u5BF9\u8C61\u7684\u65B9\u5F0F\u662F\u4ECE\u5DE5\u5382\u7C7B\u4E2D\u83B7\u53D6\u5B9E\u4F8B\u65B9\u6CD5<span class="token operator">--</span><span class="token operator">&gt;</span>
 <span class="token operator">&lt;</span>bean name<span class="token operator">=</span><span class="token string">&quot;daoFactory&quot;</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">&quot;com.DaoFactory&quot;</span><span class="token operator">&gt;</span><span class="token operator">&lt;</span><span class="token operator">/</span>bean<span class="token operator">&gt;</span>

<span class="token operator">&lt;</span>bean name<span class="token operator">=</span><span class="token string">&quot;factoryDao&quot;</span> factory<span class="token operator">-</span>bean<span class="token operator">=</span><span class="token string">&quot;daoFactory&quot;</span> factory<span class="token operator">-</span>method<span class="token operator">=</span><span class="token string">&quot;getFactoryDaoImpl&quot;</span><span class="token operator">&gt;</span><span class="token operator">&lt;</span><span class="token operator">/</span>bean<span class="token operator">&gt;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li></ul></li></ul><h3 id="_12-spring-\u6709\u54EA\u4E9B\u81EA\u52A8\u88C5\u914D\u7684\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#_12-spring-\u6709\u54EA\u4E9B\u81EA\u52A8\u88C5\u914D\u7684\u65B9\u5F0F" aria-hidden="true">#</a> 12.Spring \u6709\u54EA\u4E9B\u81EA\u52A8\u88C5\u914D\u7684\u65B9\u5F0F\uFF1F</h3><blockquote><p><strong>\u4EC0\u4E48\u662F\u81EA\u52A8\u88C5\u914D\uFF1F</strong></p></blockquote><p>Spring IOC \u5BB9\u5668\u77E5\u9053\u6240\u6709 Bean \u7684\u914D\u7F6E\u4FE1\u606F\uFF0C\u6B64\u5916\uFF0C\u901A\u8FC7 Java \u53CD\u5C04\u673A\u5236\u8FD8\u53EF\u4EE5\u83B7\u77E5\u5B9E\u73B0\u7C7B\u7684\u7ED3\u6784\u4FE1\u606F\uFF0C\u5982\u6784\u9020\u65B9\u6CD5\u7684\u7ED3\u6784\u3001\u5C5E\u6027\u7B49\u4FE1\u606F\u3002\u638C\u63E1\u6240\u6709 Bean \u7684\u8FD9\u4E9B\u4FE1\u606F\u540E\uFF0CSpring IOC \u5BB9\u5668\u5C31\u53EF\u4EE5\u6309\u7167\u67D0\u79CD\u89C4\u5219\u5BF9\u5BB9\u5668\u4E2D\u7684 Bean \u8FDB\u884C\u81EA\u52A8\u88C5\u914D\uFF0C\u800C\u65E0\u987B\u901A\u8FC7\u663E\u5F0F\u7684\u65B9\u5F0F\u8FDB\u884C\u4F9D\u8D56\u914D\u7F6E\u3002</p><p>Spring \u63D0\u4F9B\u7684\u8FD9\u79CD\u65B9\u5F0F\uFF0C\u53EF\u4EE5\u6309\u7167\u67D0\u4E9B\u89C4\u5219\u8FDB\u884C Bean \u7684\u81EA\u52A8\u88C5\u914D\uFF0C<code>&lt;bean&gt;</code>\u5143\u7D20\u63D0\u4F9B\u4E86\u4E00\u4E2A\u6307\u5B9A\u81EA\u52A8\u88C5\u914D\u7C7B\u578B\u7684\u5C5E\u6027\uFF1A<code>autowire=&quot;&lt;\u81EA\u52A8\u88C5\u914D\u7C7B\u578B&gt;&quot;</code></p><blockquote><p><strong>Spring \u63D0\u4F9B\u4E86\u54EA\u51E0\u79CD\u81EA\u52A8\u88C5\u914D\u7C7B\u578B\uFF1F</strong></p></blockquote><p>Spring \u63D0\u4F9B\u4E86 4 \u79CD\u81EA\u52A8\u88C5\u914D\u7C7B\u578B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-034120d9-88c7-490b-af07-7d48f3b6b7bc.png" alt="Spring\u56DB\u79CD\u81EA\u52A8\u88C5\u914D\u7C7B\u578B"></p><ul><li><strong>byName</strong>\uFF1A\u6839\u636E\u540D\u79F0\u8FDB\u884C\u81EA\u52A8\u5339\u914D\uFF0C\u5047\u8BBE Boss \u53C8\u4E00\u4E2A\u540D\u4E3A car \u7684\u5C5E\u6027\uFF0C\u5982\u679C\u5BB9\u5668\u4E2D\u521A\u597D\u6709\u4E00\u4E2A\u540D\u4E3A car \u7684 bean\uFF0CSpring \u5C31\u4F1A\u81EA\u52A8\u5C06\u5176\u88C5\u914D\u7ED9 Boss \u7684 car \u5C5E\u6027</li><li><strong>byType</strong>\uFF1A\u6839\u636E\u7C7B\u578B\u8FDB\u884C\u81EA\u52A8\u5339\u914D\uFF0C\u5047\u8BBE Boss \u6709\u4E00\u4E2A Car \u7C7B\u578B\u7684\u5C5E\u6027\uFF0C\u5982\u679C\u5BB9\u5668\u4E2D\u521A\u597D\u6709\u4E00\u4E2A Car \u7C7B\u578B\u7684 Bean\uFF0CSpring \u5C31\u4F1A\u81EA\u52A8\u5C06\u5176\u88C5\u914D\u7ED9 Boss \u8FD9\u4E2A\u5C5E\u6027</li><li><strong>constructor</strong>\uFF1A\u4E0E byType \u7C7B\u4F3C\uFF0C \u53EA\u4E0D\u8FC7\u5B83\u662F\u9488\u5BF9\u6784\u9020\u51FD\u6570\u6CE8\u5165\u800C\u8A00\u7684\u3002\u5982\u679C Boss \u6709\u4E00\u4E2A\u6784\u9020\u51FD\u6570\uFF0C\u6784\u9020\u51FD\u6570\u5305\u542B\u4E00\u4E2A Car \u7C7B\u578B\u7684\u5165\u53C2\uFF0C\u5982\u679C\u5BB9\u5668\u4E2D\u6709\u4E00\u4E2A Car \u7C7B\u578B\u7684 Bean\uFF0C\u5219 Spring \u5C06\u81EA\u52A8\u628A\u8FD9\u4E2A Bean \u4F5C\u4E3A Boss \u6784\u9020\u51FD\u6570\u7684\u5165\u53C2\uFF1B\u5982\u679C\u5BB9\u5668\u4E2D\u6CA1\u6709\u627E\u5230\u548C\u6784\u9020\u51FD\u6570\u5165\u53C2\u5339\u914D\u7C7B\u578B\u7684 Bean\uFF0C\u5219 Spring \u5C06\u629B\u51FA\u5F02\u5E38\u3002</li><li><strong>autodetect</strong>\uFF1A\u6839\u636E Bean \u7684\u81EA\u7701\u673A\u5236\u51B3\u5B9A\u91C7\u7528 byType \u8FD8\u662F constructor \u8FDB\u884C\u81EA\u52A8\u88C5\u914D\uFF0C\u5982\u679C Bean \u63D0\u4F9B\u4E86\u9ED8\u8BA4\u7684\u6784\u9020\u51FD\u6570\uFF0C\u5219\u91C7\u7528 byType\uFF0C\u5426\u5219\u91C7\u7528 constructor\u3002</li></ul><h3 id="_13-spring-\u4E2D\u7684-bean-\u7684\u4F5C\u7528\u57DF\u6709\u54EA\u4E9B" tabindex="-1"><a class="header-anchor" href="#_13-spring-\u4E2D\u7684-bean-\u7684\u4F5C\u7528\u57DF\u6709\u54EA\u4E9B" aria-hidden="true">#</a> 13.Spring \u4E2D\u7684 Bean \u7684\u4F5C\u7528\u57DF\u6709\u54EA\u4E9B?</h3><p>Spring \u7684 Bean \u4E3B\u8981\u652F\u6301\u4E94\u79CD\u4F5C\u7528\u57DF\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-08a9cb31-5a4f-4224-94cd-0c0f643a57ea.png" alt="Spring Bean\u652F\u6301\u4F5C\u7528\u57DF"></p><ul><li><strong>singleton</strong> : \u5728 Spring \u5BB9\u5668\u4EC5\u5B58\u5728\u4E00\u4E2A Bean \u5B9E\u4F8B\uFF0CBean \u4EE5\u5355\u5B9E\u4F8B\u7684\u65B9\u5F0F\u5B58\u5728\uFF0C\u662F Bean \u9ED8\u8BA4\u7684\u4F5C\u7528\u57DF\u3002</li><li><strong>prototype</strong> : \u6BCF\u6B21\u4ECE\u5BB9\u5668\u91CD\u8C03\u7528 Bean \u65F6\uFF0C\u90FD\u4F1A\u8FD4\u56DE\u4E00\u4E2A\u65B0\u7684\u5B9E\u4F8B\u3002</li></ul><p>\u4EE5\u4E0B\u4E09\u4E2A\u4F5C\u7528\u57DF\u4E8E\u53EA\u5728 Web \u5E94\u7528\u4E2D\u9002\u7528\uFF1A</p><ul><li><strong>request</strong> : \u6BCF\u4E00\u6B21 HTTP \u8BF7\u6C42\u90FD\u4F1A\u4EA7\u751F\u4E00\u4E2A\u65B0\u7684 Bean\uFF0C\u8BE5 Bean \u4EC5\u5728\u5F53\u524D HTTP Request \u5185\u6709\u6548\u3002</li><li><strong>session</strong> : \u540C\u4E00\u4E2A HTTP Session \u5171\u4EAB\u4E00\u4E2A Bean\uFF0C\u4E0D\u540C\u7684 HTTP Session \u4F7F\u7528\u4E0D\u540C\u7684 Bean\u3002</li><li><strong>globalSession</strong>\uFF1A\u540C\u4E00\u4E2A\u5168\u5C40 Session \u5171\u4EAB\u4E00\u4E2A Bean\uFF0C\u53EA\u7528\u4E8E\u57FA\u4E8E Protlet \u7684 Web \u5E94\u7528\uFF0CSpring5 \u4E2D\u5DF2\u7ECF\u4E0D\u5B58\u5728\u4E86\u3002</li></ul><h3 id="_14-spring-\u4E2D\u7684\u5355\u4F8B-bean-\u4F1A\u5B58\u5728\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898\u5417" tabindex="-1"><a class="header-anchor" href="#_14-spring-\u4E2D\u7684\u5355\u4F8B-bean-\u4F1A\u5B58\u5728\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898\u5417" aria-hidden="true">#</a> 14.Spring \u4E2D\u7684\u5355\u4F8B Bean \u4F1A\u5B58\u5728\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898\u5417\uFF1F</h3><p>\u9996\u5148\u7ED3\u8BBA\u5728\u8FD9\uFF1ASpring \u4E2D\u7684\u5355\u4F8B Bean<strong>\u4E0D\u662F\u7EBF\u7A0B\u5B89\u5168\u7684</strong>\u3002</p><p>\u56E0\u4E3A\u5355\u4F8B Bean\uFF0C\u662F\u5168\u5C40\u53EA\u6709\u4E00\u4E2A Bean\uFF0C\u6240\u6709\u7EBF\u7A0B\u5171\u4EAB\u3002\u5982\u679C\u8BF4\u5355\u4F8B Bean\uFF0C\u662F\u4E00\u4E2A\u65E0\u72B6\u6001\u7684\uFF0C\u4E5F\u5C31\u662F\u7EBF\u7A0B\u4E2D\u7684\u64CD\u4F5C\u4E0D\u4F1A\u5BF9 Bean \u4E2D\u7684\u6210\u5458\u53D8\u91CF\u6267\u884C<strong>\u67E5\u8BE2</strong>\u4EE5\u5916\u7684\u64CD\u4F5C\uFF0C\u90A3\u4E48\u8FD9\u4E2A\u5355\u4F8B Bean \u662F\u7EBF\u7A0B\u5B89\u5168\u7684\u3002\u6BD4\u5982 Spring mvc \u7684 Controller\u3001Service\u3001Dao \u7B49\uFF0C\u8FD9\u4E9B Bean \u5927\u591A\u662F\u65E0\u72B6\u6001\u7684\uFF0C\u53EA\u5173\u6CE8\u4E8E\u65B9\u6CD5\u672C\u8EAB\u3002</p><p>\u5047\u5982\u8FD9\u4E2A Bean \u662F\u6709\u72B6\u6001\u7684\uFF0C\u4E5F\u5C31\u662F\u4F1A\u5BF9 Bean \u4E2D\u7684\u6210\u5458\u53D8\u91CF\u8FDB\u884C\u5199\u64CD\u4F5C\uFF0C\u90A3\u4E48\u53EF\u80FD\u5C31\u5B58\u5728\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-35dacef4-1a9e-45e1-b3f2-5a91227eb244.png" alt="Spring\u5355\u4F8BBean\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898"></p><blockquote><p><strong>\u5355\u4F8B Bean \u7EBF\u7A0B\u5B89\u5168\u95EE\u9898\u600E\u4E48\u89E3\u51B3\u5462\uFF1F</strong></p></blockquote><p>\u5E38\u89C1\u7684\u6709\u8FD9\u4E48\u4E9B\u89E3\u51B3\u529E\u6CD5\uFF1A</p><ol><li><p>\u5C06 Bean \u5B9A\u4E49\u4E3A\u591A\u4F8B</p><p>\u8FD9\u6837\u6BCF\u4E00\u4E2A\u7EBF\u7A0B\u8BF7\u6C42\u8FC7\u6765\u90FD\u4F1A\u521B\u5EFA\u4E00\u4E2A\u65B0\u7684 Bean\uFF0C\u4F46\u662F\u8FD9\u6837\u5BB9\u5668\u5C31\u4E0D\u597D\u7BA1\u7406 Bean\uFF0C\u4E0D\u80FD\u8FD9\u4E48\u529E\u3002</p></li><li><p>\u5728 Bean \u5BF9\u8C61\u4E2D\u5C3D\u91CF\u907F\u514D\u5B9A\u4E49\u53EF\u53D8\u7684\u6210\u5458\u53D8\u91CF</p><p>\u524A\u8DB3\u9002\u5C65\u4E86\u5C5E\u4E8E\u662F\uFF0C\u4E5F\u4E0D\u80FD\u8FD9\u4E48\u5E72\u3002</p></li><li><p>\u5C06 Bean \u4E2D\u7684\u6210\u5458\u53D8\u91CF\u4FDD\u5B58\u5728 ThreadLocal \u4E2D \u2B50</p><p>\u6211\u4EEC\u77E5\u9053 ThredLoca \u80FD\u4FDD\u8BC1\u591A\u7EBF\u7A0B\u4E0B\u53D8\u91CF\u7684\u9694\u79BB\uFF0C\u53EF\u4EE5\u5728\u7C7B\u4E2D\u5B9A\u4E49\u4E00\u4E2A ThreadLocal \u6210\u5458\u53D8\u91CF\uFF0C\u5C06\u9700\u8981\u7684\u53EF\u53D8\u6210\u5458\u53D8\u91CF\u4FDD\u5B58\u5728 ThreadLocal \u91CC\uFF0C\u8FD9\u662F\u63A8\u8350\u7684\u4E00\u79CD\u65B9\u5F0F\u3002</p></li></ol><h3 id="_15-\u8BF4\u8BF4\u5FAA\u73AF\u4F9D\u8D56" tabindex="-1"><a class="header-anchor" href="#_15-\u8BF4\u8BF4\u5FAA\u73AF\u4F9D\u8D56" aria-hidden="true">#</a> 15.\u8BF4\u8BF4\u5FAA\u73AF\u4F9D\u8D56?</h3><blockquote><p><strong>\u4EC0\u4E48\u662F\u5FAA\u73AF\u4F9D\u8D56\uFF1F</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-f8fea53f-56fa-4cca-9199-ec7f648da625.png" alt="Spring\u5FAA\u73AF\u4F9D\u8D56"></p><p>Spring \u5FAA\u73AF\u4F9D\u8D56\uFF1A\u7B80\u5355\u8BF4\u5C31\u662F\u81EA\u5DF1\u4F9D\u8D56\u81EA\u5DF1\uFF0C\u6216\u8005\u548C\u522B\u7684 Bean \u76F8\u4E92\u4F9D\u8D56\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-0035fd25-2972-4642-a8ec-ee44a566a5bd.png" alt="\u9E21\u548C\u86CB"></p><p>\u53EA\u6709\u5355\u4F8B\u7684 Bean \u624D\u5B58\u5728\u5FAA\u73AF\u4F9D\u8D56\u7684\u60C5\u51B5\uFF0C<strong>\u539F\u578B</strong>(Prototype)\u60C5\u51B5\u4E0B\uFF0CSpring \u4F1A\u76F4\u63A5\u629B\u51FA\u5F02\u5E38\u3002\u539F\u56E0\u5F88\u7B80\u5355\uFF0CAB \u5FAA\u73AF\u4F9D\u8D56\uFF0CA \u5B9E\u4F8B\u5316\u7684\u65F6\u5019\uFF0C\u53D1\u73B0\u4F9D\u8D56 B\uFF0C\u521B\u5EFA B \u5B9E\u4F8B\uFF0C\u521B\u5EFA B \u7684\u65F6\u5019\u53D1\u73B0\u9700\u8981 A\uFF0C\u521B\u5EFA A1 \u5B9E\u4F8B\u2026\u2026\u65E0\u9650\u5957\u5A03\uFF0C\u76F4\u63A5\u628A\u7CFB\u7EDF\u5E72\u57AE\u3002</p><blockquote><p><strong>Spring \u53EF\u4EE5\u89E3\u51B3\u54EA\u4E9B\u60C5\u51B5\u7684\u5FAA\u73AF\u4F9D\u8D56\uFF1F</strong></p></blockquote><p>Spring \u4E0D\u652F\u6301\u57FA\u4E8E\u6784\u9020\u5668\u6CE8\u5165\u7684\u5FAA\u73AF\u4F9D\u8D56\uFF0C\u4F46\u662F\u5047\u5982 AB \u5FAA\u73AF\u4F9D\u8D56\uFF0C\u5982\u679C\u4E00\u4E2A\u662F\u6784\u9020\u5668\u6CE8\u5165\uFF0C\u4E00\u4E2A\u662F setter \u6CE8\u5165\u5462\uFF1F</p><p>\u770B\u770B\u51E0\u79CD\u60C5\u5F62\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-37bb576d-b4af-42ed-91f4-d846ceb012b6.png" alt="\u5FAA\u73AF\u4F9D\u8D56\u7684\u51E0\u79CD\u60C5\u5F62"></p><p>\u7B2C\u56DB\u79CD\u53EF\u4EE5\u800C\u7B2C\u4E94\u79CD\u4E0D\u53EF\u4EE5\u7684\u539F\u56E0\u662F Spring \u5728\u521B\u5EFA Bean \u65F6\u9ED8\u8BA4\u4F1A\u6839\u636E\u81EA\u7136\u6392\u5E8F\u8FDB\u884C\u521B\u5EFA\uFF0C\u6240\u4EE5 A \u4F1A\u5148\u4E8E B \u8FDB\u884C\u521B\u5EFA\u3002</p><p>\u6240\u4EE5\u7B80\u5355\u603B\u7ED3\uFF0C\u5F53\u5FAA\u73AF\u4F9D\u8D56\u7684\u5B9E\u4F8B\u90FD\u91C7\u7528 setter \u65B9\u6CD5\u6CE8\u5165\u7684\u65F6\u5019\uFF0CSpring \u53EF\u4EE5\u652F\u6301\uFF0C\u90FD\u91C7\u7528\u6784\u9020\u5668\u6CE8\u5165\u7684\u65F6\u5019\uFF0C\u4E0D\u652F\u6301\uFF0C\u6784\u9020\u5668\u6CE8\u5165\u548C setter \u6CE8\u5165\u540C\u65F6\u5B58\u5728\u7684\u65F6\u5019\uFF0C\u770B\u5929\u3002</p><h3 id="_16-\u90A3-spring-\u600E\u4E48\u89E3\u51B3\u5FAA\u73AF\u4F9D\u8D56\u7684\u5462" tabindex="-1"><a class="header-anchor" href="#_16-\u90A3-spring-\u600E\u4E48\u89E3\u51B3\u5FAA\u73AF\u4F9D\u8D56\u7684\u5462" aria-hidden="true">#</a> 16.\u90A3 Spring \u600E\u4E48\u89E3\u51B3\u5FAA\u73AF\u4F9D\u8D56\u7684\u5462\uFF1F</h3><blockquote><p>PS\uFF1A\u5176\u5B9E\u6B63\u786E\u7B54\u6848\u662F\u5F00\u53D1\u4EBA\u5458\u505A\u597D\u8BBE\u8BA1\uFF0C\u522B\u8BA9 Bean \u5FAA\u73AF\u4F9D\u8D56\uFF0C\u4F46\u662F\u6CA1\u529E\u6CD5\uFF0C\u9762\u8BD5\u5B98\u4E0D\u60F3\u542C\u8FD9\u4E2A\u3002</p></blockquote><p>\u6211\u4EEC\u90FD\u77E5\u9053\uFF0C\u5355\u4F8B Bean \u521D\u59CB\u5316\u5B8C\u6210\uFF0C\u8981\u7ECF\u5386\u4E09\u6B65\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-867066f1-49d1-4e57-94f9-4c66a3a8797e.png" alt="Bean\u521D\u59CB\u5316\u6B65\u9AA4"></p><p>\u6CE8\u5165\u5C31\u53D1\u751F\u5728\u7B2C\u4E8C\u6B65\uFF0C<strong>\u5C5E\u6027\u8D4B\u503C</strong>\uFF0C\u7ED3\u5408\u8FD9\u4E2A\u8FC7\u7A0B\uFF0CSpring \u901A\u8FC7<strong>\u4E09\u7EA7\u7F13\u5B58</strong>\u89E3\u51B3\u4E86\u5FAA\u73AF\u4F9D\u8D56\uFF1A</p><ol><li>\u4E00\u7EA7\u7F13\u5B58 : <code>Map&lt;String,Object&gt;</code> <strong>singletonObjects</strong>\uFF0C\u5355\u4F8B\u6C60\uFF0C\u7528\u4E8E\u4FDD\u5B58\u5B9E\u4F8B\u5316\u3001\u5C5E\u6027\u8D4B\u503C\uFF08\u6CE8\u5165\uFF09\u3001\u521D\u59CB\u5316\u5B8C\u6210\u7684 bean \u5B9E\u4F8B</li><li>\u4E8C\u7EA7\u7F13\u5B58 : <code>Map&lt;String,Object&gt;</code> <strong>earlySingletonObjects</strong>\uFF0C\u65E9\u671F\u66DD\u5149\u5BF9\u8C61\uFF0C\u7528\u4E8E\u4FDD\u5B58\u5B9E\u4F8B\u5316\u5B8C\u6210\u7684 bean \u5B9E\u4F8B</li><li>\u4E09\u7EA7\u7F13\u5B58 : <code>Map&lt;String,ObjectFactory&lt;?&gt;&gt;</code> <strong>singletonFactories</strong>\uFF0C\u65E9\u671F\u66DD\u5149\u5BF9\u8C61\u5DE5\u5382\uFF0C\u7528\u4E8E\u4FDD\u5B58 bean \u521B\u5EFA\u5DE5\u5382\uFF0C\u4EE5\u4FBF\u4E8E\u540E\u9762\u6269\u5C55\u6709\u673A\u4F1A\u521B\u5EFA\u4EE3\u7406\u5BF9\u8C61\u3002</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-01d92863-a2cb-4f61-8d8d-30ecf0279b28.png" alt="\u4E09\u7EA7\u7F13\u5B58"></p><p>\u6211\u4EEC\u6765\u770B\u4E00\u4E0B\u4E09\u7EA7\u7F13\u5B58\u89E3\u51B3\u5FAA\u73AF\u4F9D\u8D56\u7684\u8FC7\u7A0B\uFF1A</p><p>\u5F53 A\u3001B \u4E24\u4E2A\u7C7B\u53D1\u751F\u5FAA\u73AF\u4F9D\u8D56\u65F6\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-cfc09f84-f8e1-4702-80b6-d115843e81fe.png" alt="\u5FAA\u73AF\u4F9D\u8D56"></p><p>A \u5B9E\u4F8B\u7684\u521D\u59CB\u5316\u8FC7\u7A0B\uFF1A</p><ol><li>\u521B\u5EFA A \u5B9E\u4F8B\uFF0C\u5B9E\u4F8B\u5316\u7684\u65F6\u5019\u628A A \u5BF9\u8C61\u2F2F\u2F1A\u653E\u2F0A\u4E09\u7EA7\u7F13\u5B58\uFF0C\u8868\u793A A \u5F00\u59CB\u5B9E\u4F8B\u5316\u4E86\uFF0C\u867D\u7136\u6211\u8FD9\u4E2A\u5BF9\u8C61\u8FD8\u4E0D\u5B8C\u6574\uFF0C\u4F46\u662F\u5148\u66DD\u5149\u51FA\u6765\u8BA9\u5927\u5BB6\u77E5\u9053</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-1a8bdc29-ff43-4ff4-9b61-3eedd9da59b3.png" alt="1"></p><ol start="2"><li><p>A \u6CE8\u2F0A\u5C5E\u6027\u65F6\uFF0C\u53D1\u73B0\u4F9D\u8D56 B\uFF0C\u6B64\u65F6 B \u8FD8\u6CA1\u6709\u88AB\u521B\u5EFA\u51FA\u6765\uFF0C\u6240\u4EE5\u53BB\u5B9E\u4F8B\u5316 B</p></li><li><p>\u540C\u6837\uFF0CB \u6CE8\u2F0A\u5C5E\u6027\u65F6\u53D1\u73B0\u4F9D\u8D56 A\uFF0C\u5B83\u5C31\u4F1A\u4ECE\u7F13\u5B58\u91CC\u627E A \u5BF9\u8C61\u3002\u4F9D\u6B21\u4ECE\u2F00\u7EA7\u5230\u4E09\u7EA7\u7F13\u5B58\u67E5\u8BE2 A\uFF0C\u4ECE\u4E09\u7EA7\u7F13\u5B58\u901A\u8FC7\u5BF9\u8C61\u2F2F\u2F1A\u62FF\u5230 A\uFF0C\u53D1\u73B0 A \u867D\u7136\u4E0D\u592A\u5B8C\u5584\uFF0C\u4F46\u662F\u5B58\u5728\uFF0C\u628A A \u653E\u2F0A\u2F06\u7EA7\u7F13\u5B58\uFF0C\u540C\u65F6\u5220\u9664\u4E09\u7EA7\u7F13\u5B58\u4E2D\u7684 A\uFF0C\u6B64\u65F6\uFF0CB \u5DF2\u7ECF\u5B9E\u4F8B\u5316\u5E76\u4E14\u521D\u59CB\u5316\u5B8C\u6210\uFF0C\u628A B \u653E\u5165\u2F00\u7EA7\u7F13\u5B58\u3002</p></li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-bf2507bf-96aa-4b88-a58b-7ec41d11bc70.png" alt="2"></p><ol start="4"><li><p>\u63A5\u7740 A \u7EE7\u7EED\u5C5E\u6027\u8D4B\u503C\uFF0C\u987A\u5229\u4ECE\u2F00\u7EA7\u7F13\u5B58\u62FF\u5230\u5B9E\u4F8B\u5316\u4E14\u521D\u59CB\u5316\u5B8C\u6210\u7684 B \u5BF9\u8C61\uFF0CA \u5BF9\u8C61\u521B\u5EFA\u4E5F\u5B8C\u6210\uFF0C\u5220\u9664\u2F06\u7EA7\u7F13\u5B58\u4E2D\u7684 A\uFF0C\u540C\u65F6\u628A A \u653E\u2F0A\u2F00\u7EA7\u7F13\u5B58</p></li><li><p>\u6700\u540E\uFF0C\u2F00\u7EA7\u7F13\u5B58\u4E2D\u4FDD\u5B58\u7740\u5B9E\u4F8B\u5316\u3001\u521D\u59CB\u5316\u90FD\u5B8C\u6210\u7684 A\u3001B \u5BF9\u8C61</p></li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-022f7cb9-2c83-4fe9-b252-b02bd0fb2435.png" alt="5"></p><p>\u6240\u4EE5\uFF0C\u6211\u4EEC\u5C31\u77E5\u9053\u4E3A\u4EC0\u4E48 Spring \u80FD\u89E3\u51B3 setter \u6CE8\u5165\u7684\u5FAA\u73AF\u4F9D\u8D56\u4E86\uFF0C\u56E0\u4E3A\u5B9E\u4F8B\u5316\u548C\u5C5E\u6027\u8D4B\u503C\u662F\u5206\u5F00\u7684\uFF0C\u6240\u4EE5\u91CC\u9762\u6709\u64CD\u4F5C\u7684\u7A7A\u95F4\u3002\u5982\u679C\u90FD\u662F\u6784\u9020\u5668\u6CE8\u5165\u7684\u5316\uFF0C\u90A3\u4E48\u90FD\u5F97\u5728\u5B9E\u4F8B\u5316\u8FD9\u4E00\u6B65\u5B8C\u6210\u6CE8\u5165\uFF0C\u6240\u4EE5\u81EA\u7136\u662F\u65E0\u6CD5\u652F\u6301\u4E86\u3002</p><h3 id="_17-\u4E3A\u4EC0\u4E48\u8981\u4E09\u7EA7\u7F13\u5B58-\u4E8C\u7EA7\u4E0D\u884C\u5417" tabindex="-1"><a class="header-anchor" href="#_17-\u4E3A\u4EC0\u4E48\u8981\u4E09\u7EA7\u7F13\u5B58-\u4E8C\u7EA7\u4E0D\u884C\u5417" aria-hidden="true">#</a> 17.\u4E3A\u4EC0\u4E48\u8981\u4E09\u7EA7\u7F13\u5B58\uFF1F\u2F06\u7EA7\u4E0D\u2F8F\u5417\uFF1F</h3><p>\u4E0D\u884C\uFF0C\u4E3B\u8981\u662F\u4E3A\u4E86<strong>\u2F63\u6210\u4EE3\u7406\u5BF9\u8C61</strong>\u3002\u5982\u679C\u662F\u6CA1\u6709\u4EE3\u7406\u7684\u60C5\u51B5\u4E0B\uFF0C\u4F7F\u7528\u4E8C\u7EA7\u7F13\u5B58\u89E3\u51B3\u5FAA\u73AF\u4F9D\u8D56\u4E5F\u662F OK \u7684\u3002\u4F46\u662F\u5982\u679C\u5B58\u5728\u4EE3\u7406\uFF0C\u4E09\u7EA7\u6CA1\u6709\u95EE\u9898\uFF0C\u4E8C\u7EA7\u5C31\u4E0D\u884C\u4E86\u3002</p><p>\u56E0\u4E3A\u4E09\u7EA7\u7F13\u5B58\u4E2D\u653E\u7684\u662F\u2F63\u6210\u5177\u4F53\u5BF9\u8C61\u7684\u533F\u540D\u5185\u90E8\u7C7B\uFF0C\u83B7\u53D6 Object \u7684\u65F6\u5019\uFF0C\u5B83\u53EF\u4EE5\u2F63\u6210\u4EE3\u7406\u5BF9\u8C61\uFF0C\u4E5F\u53EF\u4EE5\u8FD4\u56DE\u666E\u901A\u5BF9\u8C61\u3002\u4F7F\u2F64\u4E09\u7EA7\u7F13\u5B58\u4E3B\u8981\u662F\u4E3A\u4E86\u4FDD\u8BC1\u4E0D\u7BA1\u4EC0\u4E48\u65F6\u5019\u4F7F\u2F64\u7684\u90FD\u662F\u2F00\u4E2A\u5BF9\u8C61\u3002</p><p>\u5047\u8BBE\u53EA\u6709\u2F06\u7EA7\u7F13\u5B58\u7684\u60C5\u51B5\uFF0C\u5F80\u2F06\u7EA7\u7F13\u5B58\u4E2D\u653E\u7684\u663E\u793A\u2F00\u4E2A\u666E\u901A\u7684 Bean \u5BF9\u8C61\uFF0CBean \u521D\u59CB\u5316\u8FC7\u7A0B\u4E2D\uFF0C\u901A\u8FC7 BeanPostProcessor \u53BB\u2F63\u6210\u4EE3\u7406\u5BF9\u8C61\u4E4B\u540E\uFF0C\u8986\u76D6\u6389\u2F06\u7EA7\u7F13\u5B58\u4E2D\u7684\u666E\u901A Bean \u5BF9\u8C61\uFF0C\u90A3\u4E48\u53EF\u80FD\u5C31\u5BFC\u81F4\u53D6\u5230\u7684 Bean \u5BF9\u8C61\u4E0D\u4E00\u81F4\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-6ece8a46-25b1-459b-8cfa-19fc696dd7d6.png" alt="\u4E8C\u7EA7\u7F13\u5B58\u4E0D\u884C\u7684\u539F\u56E0"></p><h3 id="_18-autowired-\u7684\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#_18-autowired-\u7684\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> 18.@Autowired \u7684\u5B9E\u73B0\u539F\u7406\uFF1F</h3><p>\u5B9E\u73B0@Autowired \u7684\u5173\u952E\u662F\uFF1A<strong>AutowiredAnnotationBeanPostProcessor</strong></p><p>\u5728 Bean \u7684\u521D\u59CB\u5316\u9636\u6BB5\uFF0C\u4F1A\u901A\u8FC7 Bean \u540E\u7F6E\u5904\u7406\u5668\u6765\u8FDB\u884C\u4E00\u4E9B\u524D\u7F6E\u548C\u540E\u7F6E\u7684\u5904\u7406\u3002</p><p>\u5B9E\u73B0@Autowired \u7684\u529F\u80FD\uFF0C\u4E5F\u662F\u901A\u8FC7\u540E\u7F6E\u5904\u7406\u5668\u6765\u5B8C\u6210\u7684\u3002\u8FD9\u4E2A\u540E\u7F6E\u5904\u7406\u5668\u5C31\u662F AutowiredAnnotationBeanPostProcessor\u3002</p><ul><li><p>Spring \u5728\u521B\u5EFA bean \u7684\u8FC7\u7A0B\u4E2D\uFF0C\u6700\u7EC8\u4F1A\u8C03\u7528\u5230 doCreateBean()\u65B9\u6CD5\uFF0C\u5728 doCreateBean()\u65B9\u6CD5\u4E2D\u4F1A\u8C03\u7528 populateBean()\u65B9\u6CD5\uFF0C\u6765\u4E3A bean \u8FDB\u884C\u5C5E\u6027\u586B\u5145\uFF0C\u5B8C\u6210\u81EA\u52A8\u88C5\u914D\u7B49\u5DE5\u4F5C\u3002</p></li><li><p>\u5728 populateBean()\u65B9\u6CD5\u4E2D\u4E00\u5171\u8C03\u7528\u4E86\u4E24\u6B21\u540E\u7F6E\u5904\u7406\u5668\uFF0C\u7B2C\u4E00\u6B21\u662F\u4E3A\u4E86\u5224\u65AD\u662F\u5426\u9700\u8981\u5C5E\u6027\u586B\u5145\uFF0C\u5982\u679C\u4E0D\u9700\u8981\u8FDB\u884C\u5C5E\u6027\u586B\u5145\uFF0C\u90A3\u4E48\u5C31\u4F1A\u76F4\u63A5\u8FDB\u884C return\uFF0C\u5982\u679C\u9700\u8981\u8FDB\u884C\u5C5E\u6027\u586B\u5145\uFF0C\u90A3\u4E48\u65B9\u6CD5\u5C31\u4F1A\u7EE7\u7EED\u5411\u4E0B\u6267\u884C\uFF0C\u540E\u9762\u4F1A\u8FDB\u884C\u7B2C\u4E8C\u6B21\u540E\u7F6E\u5904\u7406\u5668\u7684\u8C03\u7528\uFF0C\u8FD9\u4E2A\u65F6\u5019\uFF0C\u5C31\u4F1A\u8C03\u7528\u5230 AutowiredAnnotationBeanPostProcessor \u7684 postProcessPropertyValues()\u65B9\u6CD5\uFF0C\u5728\u8BE5\u65B9\u6CD5\u4E2D\u5C31\u4F1A\u8FDB\u884C@Autowired \u6CE8\u89E3\u7684\u89E3\u6790\uFF0C\u7136\u540E\u5B9E\u73B0\u81EA\u52A8\u88C5\u914D\u3002</p></li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
* \u5C5E\u6027\u8D4B\u503C
**/</span>
<span class="token keyword">protected</span> <span class="token keyword">void</span> <span class="token function">populateBean</span><span class="token punctuation">(</span><span class="token class-name">String</span> beanName<span class="token punctuation">,</span> <span class="token class-name">RootBeanDefinition</span> mbd<span class="token punctuation">,</span> <span class="token annotation punctuation">@Nullable</span> <span class="token class-name">BeanWrapper</span> bw<span class="token punctuation">)</span> <span class="token punctuation">{</span>
          <span class="token comment">//\u2026\u2026\u2026\u2026</span>
          <span class="token keyword">if</span> <span class="token punctuation">(</span>hasInstAwareBpps<span class="token punctuation">)</span> <span class="token punctuation">{</span>
              <span class="token keyword">if</span> <span class="token punctuation">(</span>pvs <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                  pvs <span class="token operator">=</span> mbd<span class="token punctuation">.</span><span class="token function">getPropertyValues</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
              <span class="token punctuation">}</span>

              <span class="token class-name">PropertyValues</span> pvsToUse<span class="token punctuation">;</span>
              <span class="token keyword">for</span><span class="token punctuation">(</span><span class="token class-name">Iterator</span> var9 <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getBeanPostProcessorCache</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span>instantiationAware<span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> var9<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> pvs <span class="token operator">=</span> pvsToUse<span class="token punctuation">)</span> <span class="token punctuation">{</span>
                  <span class="token class-name">InstantiationAwareBeanPostProcessor</span> bp <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">InstantiationAwareBeanPostProcessor</span><span class="token punctuation">)</span>var9<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                  pvsToUse <span class="token operator">=</span> bp<span class="token punctuation">.</span><span class="token function">postProcessProperties</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token class-name">PropertyValues</span><span class="token punctuation">)</span>pvs<span class="token punctuation">,</span> bw<span class="token punctuation">.</span><span class="token function">getWrappedInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> beanName<span class="token punctuation">)</span><span class="token punctuation">;</span>
                  <span class="token keyword">if</span> <span class="token punctuation">(</span>pvsToUse <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                      <span class="token keyword">if</span> <span class="token punctuation">(</span>filteredPds <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                          filteredPds <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">filterPropertyDescriptorsForDependencyCheck</span><span class="token punctuation">(</span>bw<span class="token punctuation">,</span> mbd<span class="token punctuation">.</span>allowCaching<span class="token punctuation">)</span><span class="token punctuation">;</span>
                      <span class="token punctuation">}</span>
                      <span class="token comment">//\u6267\u884C\u540E\u5904\u7406\u5668\uFF0C\u586B\u5145\u5C5E\u6027\uFF0C\u5B8C\u6210\u81EA\u52A8\u88C5\u914D</span>
                      <span class="token comment">//\u8C03\u7528InstantiationAwareBeanPostProcessor\u7684postProcessPropertyValues()\u65B9\u6CD5</span>
                      pvsToUse <span class="token operator">=</span> bp<span class="token punctuation">.</span><span class="token function">postProcessPropertyValues</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token class-name">PropertyValues</span><span class="token punctuation">)</span>pvs<span class="token punctuation">,</span> filteredPds<span class="token punctuation">,</span> bw<span class="token punctuation">.</span><span class="token function">getWrappedInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> beanName<span class="token punctuation">)</span><span class="token punctuation">;</span>
                      <span class="token keyword">if</span> <span class="token punctuation">(</span>pvsToUse <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                          <span class="token keyword">return</span><span class="token punctuation">;</span>
                      <span class="token punctuation">}</span>
                  <span class="token punctuation">}</span>
              <span class="token punctuation">}</span>
          <span class="token punctuation">}</span>
         <span class="token comment">//\u2026\u2026\u2026\u2026</span>
  <span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>postProcessorPropertyValues()\u65B9\u6CD5\u7684\u6E90\u7801\u5982\u4E0B\uFF0C\u5728\u8BE5\u65B9\u6CD5\u4E2D\uFF0C\u4F1A\u5148\u8C03\u7528 findAutowiringMetadata()\u65B9\u6CD5\u89E3\u6790\u51FA bean \u4E2D\u5E26\u6709@Autowired \u6CE8\u89E3\u3001@Inject \u548C@Value \u6CE8\u89E3\u7684\u5C5E\u6027\u548C\u65B9\u6CD5\u3002\u7136\u540E\u8C03\u7528 metadata.inject()\u65B9\u6CD5\uFF0C\u8FDB\u884C\u5C5E\u6027\u586B\u5145\u3002</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>  <span class="token keyword">public</span> <span class="token class-name">PropertyValues</span> <span class="token function">postProcessProperties</span><span class="token punctuation">(</span><span class="token class-name">PropertyValues</span> pvs<span class="token punctuation">,</span> <span class="token class-name">Object</span> bean<span class="token punctuation">,</span> <span class="token class-name">String</span> beanName<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token comment">//@Autowired\u6CE8\u89E3\u3001@Inject\u548C@Value\u6CE8\u89E3\u7684\u5C5E\u6027\u548C\u65B9\u6CD5</span>
      <span class="token class-name">InjectionMetadata</span> metadata <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">findAutowiringMetadata</span><span class="token punctuation">(</span>beanName<span class="token punctuation">,</span> bean<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> pvs<span class="token punctuation">)</span><span class="token punctuation">;</span>

      <span class="token keyword">try</span> <span class="token punctuation">{</span>
          <span class="token comment">//\u5C5E\u6027\u586B\u5145</span>
          metadata<span class="token punctuation">.</span><span class="token function">inject</span><span class="token punctuation">(</span>bean<span class="token punctuation">,</span> beanName<span class="token punctuation">,</span> pvs<span class="token punctuation">)</span><span class="token punctuation">;</span>
          <span class="token keyword">return</span> pvs<span class="token punctuation">;</span>
      <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">BeanCreationException</span> var6<span class="token punctuation">)</span> <span class="token punctuation">{</span>
          <span class="token keyword">throw</span> var6<span class="token punctuation">;</span>
      <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Throwable</span> var7<span class="token punctuation">)</span> <span class="token punctuation">{</span>
          <span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">BeanCreationException</span><span class="token punctuation">(</span>beanName<span class="token punctuation">,</span> <span class="token string">&quot;Injection of autowired dependencies failed&quot;</span><span class="token punctuation">,</span> var7<span class="token punctuation">)</span><span class="token punctuation">;</span>
      <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="aop" tabindex="-1"><a class="header-anchor" href="#aop" aria-hidden="true">#</a> AOP</h2><h3 id="_19-\u8BF4\u8BF4\u4EC0\u4E48\u662F-aop" tabindex="-1"><a class="header-anchor" href="#_19-\u8BF4\u8BF4\u4EC0\u4E48\u662F-aop" aria-hidden="true">#</a> 19.\u8BF4\u8BF4\u4EC0\u4E48\u662F AOP\uFF1F</h3><p>AOP\uFF1A\u9762\u5411\u5207\u9762\u7F16\u7A0B\u3002\u7B80\u5355\u8BF4\uFF0C\u5C31\u662F\u628A\u4E00\u4E9B\u4E1A\u52A1\u903B\u8F91\u4E2D\u7684\u76F8\u540C\u7684\u4EE3\u7801\u62BD\u53D6\u5230\u4E00\u4E2A\u72EC\u7ACB\u7684\u6A21\u5757\u4E2D\uFF0C\u8BA9\u4E1A\u52A1\u903B\u8F91\u66F4\u52A0\u6E05\u723D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-09dbcda4-7c1b-42d6-8520-1a5fc84abbde.png" alt="\u6A2A\u5411\u62BD\u53D6"></p><p>\u5177\u4F53\u6765\u8BF4\uFF0C\u5047\u5982\u6211\u73B0\u5728\u8981 crud \u5199\u4E00\u5806\u4E1A\u52A1\uFF0C\u53EF\u662F\u5982\u4F55\u4E1A\u52A1\u4EE3\u7801\u524D\u540E\u524D\u540E\u8FDB\u884C\u6253\u5370\u65E5\u5FD7\u548C\u53C2\u6570\u7684\u6821\u9A8C\u5462\uFF1F</p><p>\u6211\u4EEC\u53EF\u4EE5\u628A<code>\u65E5\u5FD7\u8BB0\u5F55</code>\u548C<code>\u6570\u636E\u6821\u9A8C</code>\u53EF\u91CD\u7528\u7684\u529F\u80FD\u6A21\u5757\u5206\u79BB\u51FA\u6765\uFF0C\u7136\u540E\u5728\u7A0B\u5E8F\u7684\u6267\u884C\u7684\u5408\u9002\u7684\u5730\u65B9\u52A8\u6001\u5730\u690D\u5165\u8FD9\u4E9B\u4EE3\u7801\u5E76\u6267\u884C\u3002\u8FD9\u6837\u5C31\u7B80\u5316\u4E86\u4EE3\u7801\u7684\u4E66\u5199\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-4754b4c0-0356-4077-a2f9-55e246cf8ba0.png" alt="AOP\u5E94\u7528\u793A\u4F8B"></p><p>\u4E1A\u52A1\u903B\u8F91\u4EE3\u7801\u4E2D\u6CA1\u6709\u53C2\u548C\u901A\u7528\u903B\u8F91\u7684\u4EE3\u7801\uFF0C\u4E1A\u52A1\u6A21\u5757\u66F4\u7B80\u6D01\uFF0C\u53EA\u5305\u542B\u6838\u5FC3\u4E1A\u52A1\u4EE3\u7801\u3002\u5B9E\u73B0\u4E86\u4E1A\u52A1\u903B\u8F91\u548C\u901A\u7528\u903B\u8F91\u7684\u4EE3\u7801\u5206\u79BB\uFF0C\u4FBF\u4E8E\u7EF4\u62A4\u548C\u5347\u7EA7\uFF0C\u964D\u4F4E\u4E86\u4E1A\u52A1\u903B\u8F91\u548C\u901A\u7528\u903B\u8F91\u7684\u8026\u5408\u6027\u3002</p><p>AOP \u53EF\u4EE5\u5C06\u904D\u5E03\u5E94\u7528\u5404\u5904\u7684\u529F\u80FD\u5206\u79BB\u51FA\u6765\u5F62\u6210\u53EF\u91CD\u7528\u7684\u7EC4\u4EF6\u3002\u5728\u7F16\u8BD1\u671F\u95F4\u3001\u88C5\u8F7D\u671F\u95F4\u6216\u8FD0\u884C\u671F\u95F4\u5B9E\u73B0\u5728\u4E0D\u4FEE\u6539\u6E90\u4EE3\u7801\u7684\u60C5\u51B5\u4E0B\u7ED9\u7A0B\u5E8F\u52A8\u6001\u6DFB\u52A0\u529F\u80FD\u3002\u4ECE\u800C\u5B9E\u73B0\u5BF9\u4E1A\u52A1\u903B\u8F91\u7684\u9694\u79BB\uFF0C\u63D0\u9AD8\u4EE3\u7801\u7684\u6A21\u5757\u5316\u80FD\u529B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-2b9859e5-019c-4e87-a449-990d3deae135.png" alt="Java\u8BED\u8A00\u6267\u884C\u8FC7\u7A0B"></p><p>AOP \u7684\u6838\u5FC3\u5176\u5B9E\u5C31\u662F<strong>\u52A8\u6001\u4EE3\u7406</strong>\uFF0C\u5982\u679C\u662F\u5B9E\u73B0\u4E86\u63A5\u53E3\u7684\u8BDD\u5C31\u4F1A\u4F7F\u7528 JDK \u52A8\u6001\u4EE3\u7406\uFF0C\u5426\u5219\u4F7F\u7528 CGLIB \u4EE3\u7406\uFF0C\u4E3B\u8981\u5E94\u7528\u4E8E\u5904\u7406\u4E00\u4E9B\u5177\u6709\u6A2A\u5207\u6027\u8D28\u7684\u7CFB\u7EDF\u7EA7\u670D\u52A1\uFF0C\u5982\u65E5\u5FD7\u6536\u96C6\u3001\u4E8B\u52A1\u7BA1\u7406\u3001\u5B89\u5168\u68C0\u67E5\u3001\u7F13\u5B58\u3001\u5BF9\u8C61\u6C60\u7BA1\u7406\u7B49\u3002</p><blockquote><p><strong>AOP \u6709\u54EA\u4E9B\u6838\u5FC3\u6982\u5FF5\uFF1F</strong></p></blockquote><ul><li><p><strong>\u5207\u9762</strong>\uFF08Aspect\uFF09\uFF1A\u7C7B\u662F\u5BF9\u7269\u4F53\u7279\u5F81\u7684\u62BD\u8C61\uFF0C\u5207\u9762\u5C31\u662F\u5BF9\u6A2A\u5207\u5173\u6CE8\u70B9\u7684\u62BD\u8C61</p></li><li><p><strong>\u8FDE\u63A5\u70B9</strong>\uFF08Joinpoint\uFF09\uFF1A\u88AB\u62E6\u622A\u5230\u7684\u70B9\uFF0C\u56E0\u4E3A Spring \u53EA\u652F\u6301\u65B9\u6CD5\u7C7B\u578B\u7684\u8FDE\u63A5\u70B9\uFF0C\u6240\u4EE5\u5728 Spring \u4E2D\u8FDE\u63A5\u70B9\u6307\u7684\u5C31\u662F\u88AB\u62E6\u622A\u5230\u7684\u65B9\u6CD5\uFF0C\u5B9E\u9645\u4E0A\u8FDE\u63A5\u70B9\u8FD8\u53EF\u4EE5\u662F\u5B57\u6BB5\u6216\u8005\u6784\u9020\u5668</p></li><li><p><strong>\u5207\u70B9</strong>\uFF08Pointcut\uFF09\uFF1A\u5BF9\u8FDE\u63A5\u70B9\u8FDB\u884C\u62E6\u622A\u7684\u5B9A\u4F4D</p></li><li><p><strong>\u901A\u77E5</strong>\uFF08Advice\uFF09\uFF1A\u6240\u8C13\u901A\u77E5\u6307\u7684\u5C31\u662F\u6307\u62E6\u622A\u5230\u8FDE\u63A5\u70B9\u4E4B\u540E\u8981\u6267\u884C\u7684\u4EE3\u7801\uFF0C\u4E5F\u53EF\u4EE5\u79F0\u4F5C<strong>\u589E\u5F3A</strong></p></li><li><p><strong>\u76EE\u6807\u5BF9\u8C61</strong> \uFF08Target\uFF09\uFF1A\u4EE3\u7406\u7684\u76EE\u6807\u5BF9\u8C61</p></li><li><p><strong>\u7EC7\u5165</strong>\uFF08Weabing\uFF09\uFF1A\u7EC7\u5165\u662F\u5C06\u589E\u5F3A\u6DFB\u52A0\u5230\u76EE\u6807\u7C7B\u7684\u5177\u4F53\u8FDE\u63A5\u70B9\u4E0A\u7684\u8FC7\u7A0B\u3002</p><ul><li><p>\u7F16\u8BD1\u671F\u7EC7\u5165\uFF1A\u5207\u9762\u5728\u76EE\u6807\u7C7B\u7F16\u8BD1\u65F6\u88AB\u7EC7\u5165</p></li><li><p>\u7C7B\u52A0\u8F7D\u671F\u7EC7\u5165\uFF1A\u5207\u9762\u5728\u76EE\u6807\u7C7B\u52A0\u8F7D\u5230 JVM \u65F6\u88AB\u7EC7\u5165\u3002\u9700\u8981\u7279\u6B8A\u7684\u7C7B\u52A0\u8F7D\u5668\uFF0C\u5B83\u53EF\u4EE5\u5728\u76EE\u6807\u7C7B\u88AB\u5F15\u5165\u5E94\u7528\u4E4B\u524D\u589E\u5F3A\u8BE5\u76EE\u6807\u7C7B\u7684\u5B57\u8282\u7801\u3002</p></li><li><p>\u8FD0\u884C\u671F\u7EC7\u5165\uFF1A\u5207\u9762\u5728\u5E94\u7528\u8FD0\u884C\u7684\u67D0\u4E2A\u65F6\u523B\u88AB\u7EC7\u5165\u3002\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u5728\u7EC7\u5165\u5207\u9762\u65F6\uFF0CAOP \u5BB9\u5668\u4F1A\u4E3A\u76EE\u6807\u5BF9\u8C61\u52A8\u6001\u5730\u521B\u5EFA\u4E00\u4E2A\u4EE3\u7406\u5BF9\u8C61\u3002SpringAOP \u5C31\u662F\u4EE5\u8FD9\u79CD\u65B9\u5F0F\u7EC7\u5165\u5207\u9762\u3002</p><p>Spring \u91C7\u7528\u8FD0\u884C\u671F\u7EC7\u5165\uFF0C\u800C AspectJ \u91C7\u7528\u7F16\u8BD1\u671F\u7EC7\u5165\u548C\u7C7B\u52A0\u8F7D\u5668\u7EC7\u5165\u3002</p></li></ul></li><li><p><strong>\u5F15\u4ECB</strong>\uFF08introduction\uFF09\uFF1A\u5F15\u4ECB\u662F\u4E00\u79CD\u7279\u6B8A\u7684\u589E\u5F3A\uFF0C\u53EF\u4EE5\u52A8\u6001\u5730\u4E3A\u7C7B\u6DFB\u52A0\u4E00\u4E9B\u5C5E\u6027\u548C\u65B9\u6CD5</p></li></ul><blockquote><p><strong>AOP \u6709\u54EA\u4E9B\u73AF\u7ED5\u65B9\u5F0F\uFF1F</strong></p></blockquote><p>AOP \u4E00\u822C\u6709 <strong>5 \u79CD</strong>\u73AF\u7ED5\u65B9\u5F0F\uFF1A</p><ul><li>\u524D\u7F6E\u901A\u77E5 (@Before)</li><li>\u8FD4\u56DE\u901A\u77E5 (@AfterReturning)</li><li>\u5F02\u5E38\u901A\u77E5 (@AfterThrowing)</li><li>\u540E\u7F6E\u901A\u77E5 (@After)</li><li>\u73AF\u7ED5\u901A\u77E5 (@Around)</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-320fa34f-6620-419c-b17a-4f516a83caeb.png" alt="\u73AF\u7ED5\u65B9\u5F0F"></p><p>\u591A\u4E2A\u5207\u9762\u7684\u60C5\u51B5\u4E0B\uFF0C\u53EF\u4EE5\u901A\u8FC7 @Order \u6307\u5B9A\u5148\u540E\u987A\u5E8F\uFF0C\u6570\u5B57\u8D8A\u5C0F\uFF0C\u4F18\u5148\u7EA7\u8D8A\u9AD8\u3002</p><h3 id="_20-\u8BF4\u8BF4\u4F60\u5E73\u65F6\u6709\u7528\u5230-aop-\u5417" tabindex="-1"><a class="header-anchor" href="#_20-\u8BF4\u8BF4\u4F60\u5E73\u65F6\u6709\u7528\u5230-aop-\u5417" aria-hidden="true">#</a> 20.\u8BF4\u8BF4\u4F60\u5E73\u65F6\u6709\u7528\u5230 AOP \u5417\uFF1F</h3><p>PS\uFF1A\u8FD9\u9053\u9898\u8001\u4E09\u7684\u540C\u4E8B\u9762\u8BD5\u5019\u9009\u4EBA\u7684\u65F6\u5019\u95EE\u5230\u4E86\uFF0C\u5019\u9009\u4EBA\u8BF4\u4E86\u4E00\u5806 AOP \u539F\u7406\uFF0C\u540C\u4E8B\u5C31\u52BF\u6765\u4E00\u53E5\uFF0C\u4F60\u80FD\u73B0\u573A\u5199\u4E00\u4E0B AOP \u7684\u5E94\u7528\u5417\uFF1F\u7ED3\u679C\u2014\u2014\u573A\u9762\u4E00\u5EA6\u5F88\u5C34\u5C2C\u3002\u867D\u7136\u6211\u5BF9\u9762\u8BD5\u5199\u8FD9\u79CD\u767E\u5EA6\u5C31\u80FD\u51FA\u6765\u7684\u4E1C\u897F\u6301\u4FDD\u7559\u610F\u89C1\uFF0C\u4F46\u662F\u8FD8\u662F\u52A0\u4E0A\u4E86\u8FD9\u4E00\u95EE\uFF0C\u6BD5\u7ADF\u62DB\u4EBA\u6700\u540E\u90FD\u662F\u8981\u64B8\u4EE3\u7801\u7684\u3002</p><p>\u8FD9\u91CC\u7ED9\u51FA\u4E00\u4E2A\u5C0F\u4F8B\u5B50\uFF0CSpringBoot \u9879\u76EE\u4E2D\uFF0C\u5229\u7528 AOP \u6253\u5370\u63A5\u53E3\u7684\u5165\u53C2\u548C\u51FA\u53C2\u65E5\u5FD7\uFF0C\u4EE5\u53CA\u6267\u884C\u65F6\u95F4\uFF0C\u8FD8\u662F\u6BD4\u8F83\u5FEB\u6377\u7684\u3002</p><ul><li><p>\u5F15\u5165\u4F9D\u8D56\uFF1A\u5F15\u5165 AOP \u4F9D\u8D56</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>        <span class="token generics"><span class="token punctuation">&lt;</span>dependency<span class="token punctuation">&gt;</span></span>
            <span class="token generics"><span class="token punctuation">&lt;</span>groupId<span class="token punctuation">&gt;</span></span>org<span class="token punctuation">.</span>springframework<span class="token punctuation">.</span>boot<span class="token operator">&lt;</span><span class="token operator">/</span>groupId<span class="token operator">&gt;</span>
            <span class="token generics"><span class="token punctuation">&lt;</span>artifactId<span class="token punctuation">&gt;</span></span>spring<span class="token operator">-</span>boot<span class="token operator">-</span>starter<span class="token operator">-</span>aop<span class="token operator">&lt;</span><span class="token operator">/</span>artifactId<span class="token operator">&gt;</span>
        <span class="token operator">&lt;</span><span class="token operator">/</span>dependency<span class="token operator">&gt;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u81EA\u5B9A\u4E49\u6CE8\u89E3\uFF1A\u81EA\u5B9A\u4E49\u4E00\u4E2A\u6CE8\u89E3\u4F5C\u4E3A\u5207\u70B9</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Retention</span><span class="token punctuation">(</span><span class="token class-name">RetentionPolicy</span><span class="token punctuation">.</span>RUNTIME<span class="token punctuation">)</span>
<span class="token annotation punctuation">@Target</span><span class="token punctuation">(</span><span class="token punctuation">{</span><span class="token class-name">ElementType</span><span class="token punctuation">.</span>METHOD<span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token annotation punctuation">@Documented</span>
<span class="token keyword">public</span> <span class="token annotation punctuation">@interface</span> <span class="token class-name">WebLog</span> <span class="token punctuation">{</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u914D\u7F6E AOP \u5207\u9762\uFF1A</p><ul><li><p>@Aspect\uFF1A\u6807\u8BC6\u5207\u9762</p></li><li><p>@Pointcut\uFF1A\u8BBE\u7F6E\u5207\u70B9\uFF0C\u8FD9\u91CC\u4EE5\u81EA\u5B9A\u4E49\u6CE8\u89E3\u4E3A\u5207\u70B9\uFF0C\u5B9A\u4E49\u5207\u70B9\u6709\u5F88\u591A\u5176\u5B83\u79CD\u65B9\u5F0F\uFF0C\u81EA\u5B9A\u4E49\u6CE8\u89E3\u662F\u6BD4\u8F83\u5E38\u7528\u7684\u4E00\u79CD\u3002</p></li><li><p>@Before\uFF1A\u5728\u5207\u70B9\u4E4B\u524D\u7EC7\u5165\uFF0C\u6253\u5370\u4E86\u4E00\u4E9B\u5165\u53C2\u4FE1\u606F</p></li><li><p>@Around\uFF1A\u73AF\u7ED5\u5207\u70B9\uFF0C\u6253\u5370\u8FD4\u56DE\u53C2\u6570\u548C\u63A5\u53E3\u6267\u884C\u65F6\u95F4</p></li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Aspect</span>
<span class="token annotation punctuation">@Component</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">WebLogAspect</span> <span class="token punctuation">{</span>

    <span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token keyword">static</span> <span class="token class-name">Logger</span> logger         <span class="token operator">=</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">WebLogAspect</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token doc-comment comment">/**
     * \u4EE5\u81EA\u5B9A\u4E49 @WebLog \u6CE8\u89E3\u4E3A\u5207\u70B9
     **/</span>
    <span class="token annotation punctuation">@Pointcut</span><span class="token punctuation">(</span><span class="token string">&quot;@annotation(cn.fighter3.spring.aop_demo.WebLog)&quot;</span><span class="token punctuation">)</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">webLog</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token punctuation">}</span>

    <span class="token doc-comment comment">/**
     * \u5728\u5207\u70B9\u4E4B\u524D\u7EC7\u5165
     */</span>
    <span class="token annotation punctuation">@Before</span><span class="token punctuation">(</span><span class="token string">&quot;webLog()&quot;</span><span class="token punctuation">)</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">doBefore</span><span class="token punctuation">(</span><span class="token class-name">JoinPoint</span> joinPoint<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Throwable</span> <span class="token punctuation">{</span>
        <span class="token comment">// \u5F00\u59CB\u6253\u5370\u8BF7\u6C42\u65E5\u5FD7</span>
        <span class="token class-name">ServletRequestAttributes</span> attributes <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">ServletRequestAttributes</span><span class="token punctuation">)</span> <span class="token class-name">RequestContextHolder</span><span class="token punctuation">.</span><span class="token function">getRequestAttributes</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token class-name">HttpServletRequest</span> request <span class="token operator">=</span> attributes<span class="token punctuation">.</span><span class="token function">getRequest</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// \u6253\u5370\u8BF7\u6C42\u76F8\u5173\u53C2\u6570</span>
        logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;========================================== Start ==========================================&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// \u6253\u5370\u8BF7\u6C42 url</span>
        logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;URL            : {}&quot;</span><span class="token punctuation">,</span> request<span class="token punctuation">.</span><span class="token function">getRequestURL</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// \u6253\u5370 Http method</span>
        logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;HTTP Method    : {}&quot;</span><span class="token punctuation">,</span> request<span class="token punctuation">.</span><span class="token function">getMethod</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// \u6253\u5370\u8C03\u7528 controller \u7684\u5168\u8DEF\u5F84\u4EE5\u53CA\u6267\u884C\u65B9\u6CD5</span>
        logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;Class Method   : {}.{}&quot;</span><span class="token punctuation">,</span> joinPoint<span class="token punctuation">.</span><span class="token function">getSignature</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getDeclaringTypeName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> joinPoint<span class="token punctuation">.</span><span class="token function">getSignature</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// \u6253\u5370\u8BF7\u6C42\u7684 IP</span>
        logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;IP             : {}&quot;</span><span class="token punctuation">,</span> request<span class="token punctuation">.</span><span class="token function">getRemoteAddr</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// \u6253\u5370\u8BF7\u6C42\u5165\u53C2</span>
        logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;Request Args   : {}&quot;</span><span class="token punctuation">,</span><span class="token keyword">new</span> <span class="token class-name">ObjectMapper</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">writeValueAsString</span><span class="token punctuation">(</span>joinPoint<span class="token punctuation">.</span><span class="token function">getArgs</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token doc-comment comment">/**
     * \u5728\u5207\u70B9\u4E4B\u540E\u7EC7\u5165
     * <span class="token keyword">@throws</span> <span class="token reference"><span class="token class-name">Throwable</span></span>
     */</span>
    <span class="token annotation punctuation">@After</span><span class="token punctuation">(</span><span class="token string">&quot;webLog()&quot;</span><span class="token punctuation">)</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">doAfter</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Throwable</span> <span class="token punctuation">{</span>
        <span class="token comment">// \u7ED3\u675F\u540E\u6253\u4E2A\u5206\u9694\u7EBF\uFF0C\u65B9\u4FBF\u67E5\u770B</span>
        logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;=========================================== End ===========================================&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token doc-comment comment">/**
     * \u73AF\u7ED5
     */</span>
    <span class="token annotation punctuation">@Around</span><span class="token punctuation">(</span><span class="token string">&quot;webLog()&quot;</span><span class="token punctuation">)</span>
    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">doAround</span><span class="token punctuation">(</span><span class="token class-name">ProceedingJoinPoint</span> proceedingJoinPoint<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Throwable</span> <span class="token punctuation">{</span>
        <span class="token comment">//\u5F00\u59CB\u65F6\u95F4</span>
        <span class="token keyword">long</span> startTime <span class="token operator">=</span> <span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token class-name">Object</span> result <span class="token operator">=</span> proceedingJoinPoint<span class="token punctuation">.</span><span class="token function">proceed</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// \u6253\u5370\u51FA\u53C2</span>
        logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;Response Args  : {}&quot;</span><span class="token punctuation">,</span> <span class="token keyword">new</span> <span class="token class-name">ObjectMapper</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">writeValueAsString</span><span class="token punctuation">(</span>result<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// \u6267\u884C\u8017\u65F6</span>
        logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;Time-Consuming : {} ms&quot;</span><span class="token punctuation">,</span> <span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">return</span> result<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u4F7F\u7528\uFF1A\u53EA\u9700\u8981\u5728\u63A5\u53E3\u4E0A\u52A0\u4E0A\u81EA\u5B9A\u4E49\u6CE8\u89E3</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>    <span class="token annotation punctuation">@GetMapping</span><span class="token punctuation">(</span><span class="token string">&quot;/hello&quot;</span><span class="token punctuation">)</span>
    <span class="token annotation punctuation">@WebLog</span><span class="token punctuation">(</span>desc <span class="token operator">=</span> <span class="token string">&quot;\u8FD9\u662F\u4E00\u4E2A\u6B22\u8FCE\u63A5\u53E3&quot;</span><span class="token punctuation">)</span>
    <span class="token keyword">public</span> <span class="token class-name">String</span> <span class="token function">hello</span><span class="token punctuation">(</span><span class="token class-name">String</span> name<span class="token punctuation">)</span><span class="token punctuation">{</span>
        <span class="token keyword">return</span> <span class="token string">&quot;Hello &quot;</span><span class="token operator">+</span>name<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li></ul><ul><li>\u6267\u884C\u7ED3\u679C\uFF1A\u53EF\u4EE5\u770B\u5230\u65E5\u5FD7\u6253\u5370\u4E86\u5165\u53C2\u3001\u51FA\u53C2\u548C\u6267\u884C\u65F6\u95F4 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-9c14f774-44b9-41b3-a8c0-f2a54385f6ff.png" alt="\u6267\u884C\u7ED3\u679C"></li></ul><h3 id="_21-\u8BF4\u8BF4-jdk-\u52A8\u6001\u4EE3\u7406\u548C-cglib-\u4EE3\u7406" tabindex="-1"><a class="header-anchor" href="#_21-\u8BF4\u8BF4-jdk-\u52A8\u6001\u4EE3\u7406\u548C-cglib-\u4EE3\u7406" aria-hidden="true">#</a> 21.\u8BF4\u8BF4 JDK \u52A8\u6001\u4EE3\u7406\u548C CGLIB \u4EE3\u7406 \uFF1F</h3>`,117),j=n("Spring \u7684 AOP \u662F\u901A\u8FC7"),B={href:"https://mp.weixin.qq.com/s/aZtfwik0weJN5JzYc-JxYg",target:"_blank",rel:"noopener noreferrer"},A=n("\u52A8\u6001\u4EE3\u7406"),q=n("\u6765\u5B9E\u73B0\u7684\uFF0C\u52A8\u6001\u4EE3\u7406\u4E3B\u8981\u6709\u4E24\u79CD\u65B9\u5F0F JDK \u52A8\u6001\u4EE3\u7406\u548C Cglib \u52A8\u6001\u4EE3\u7406\uFF0C\u8FD9\u4E24\u79CD\u52A8\u6001\u4EE3\u7406\u7684\u4F7F\u7528\u548C\u539F\u7406\u6709\u4E9B\u4E0D\u540C\u3002"),P=e(`<p><strong>JDK \u52A8\u6001\u4EE3\u7406</strong></p><ol><li><strong>Interface</strong>\uFF1A\u5BF9\u4E8E JDK \u52A8\u6001\u4EE3\u7406\uFF0C\u76EE\u6807\u7C7B\u9700\u8981\u5B9E\u73B0\u4E00\u4E2A Interface\u3002</li><li><strong>InvocationHandler</strong>\uFF1AInvocationHandler \u662F\u4E00\u4E2A\u63A5\u53E3\uFF0C\u53EF\u4EE5\u901A\u8FC7\u5B9E\u73B0\u8FD9\u4E2A\u63A5\u53E3\uFF0C\u5B9A\u4E49\u6A2A\u5207\u903B\u8F91\uFF0C\u518D\u901A\u8FC7\u53CD\u5C04\u673A\u5236\uFF08invoke\uFF09\u8C03\u7528\u76EE\u6807\u7C7B\u7684\u4EE3\u7801\uFF0C\u5728\u6B21\u8FC7\u7A0B\uFF0C\u53EF\u80FD\u5305\u88C5\u903B\u8F91\uFF0C\u5BF9\u76EE\u6807\u65B9\u6CD5\u8FDB\u884C\u524D\u7F6E\u540E\u7F6E\u5904\u7406\u3002</li><li><strong>Proxy</strong>\uFF1AProxy \u5229\u7528 InvocationHandler \u52A8\u6001\u521B\u5EFA\u4E00\u4E2A\u7B26\u5408\u76EE\u6807\u7C7B\u5B9E\u73B0\u7684\u63A5\u53E3\u7684\u5B9E\u4F8B\uFF0C\u751F\u6210\u76EE\u6807\u7C7B\u7684\u4EE3\u7406\u5BF9\u8C61\u3002</li></ol><p><strong>CgLib \u52A8\u6001\u4EE3\u7406</strong></p><ol><li>\u4F7F\u7528 JDK \u521B\u5EFA\u4EE3\u7406\u6709\u4E00\u5927\u9650\u5236\uFF0C\u5B83\u53EA\u80FD\u4E3A\u63A5\u53E3\u521B\u5EFA\u4EE3\u7406\u5B9E\u4F8B\uFF0C\u800C CgLib \u52A8\u6001\u4EE3\u7406\u5C31\u6CA1\u6709\u8FD9\u4E2A\u9650\u5236\u3002</li><li>CgLib \u52A8\u6001\u4EE3\u7406\u662F\u4F7F\u7528\u5B57\u8282\u7801\u5904\u7406\u6846\u67B6 <strong>ASM</strong>\uFF0C\u5176\u539F\u7406\u662F\u901A\u8FC7\u5B57\u8282\u7801\u6280\u672F\u4E3A\u4E00\u4E2A\u7C7B\u521B\u5EFA\u5B50\u7C7B\uFF0C\u5E76\u5728\u5B50\u7C7B\u4E2D\u91C7\u7528\u65B9\u6CD5\u62E6\u622A\u7684\u6280\u672F\u62E6\u622A\u6240\u6709\u7236\u7C7B\u65B9\u6CD5\u7684\u8C03\u7528\uFF0C\u987A\u52BF\u7EC7\u5165\u6A2A\u5207\u903B\u8F91\u3002</li><li><strong>CgLib</strong> \u521B\u5EFA\u7684\u52A8\u6001\u4EE3\u7406\u5BF9\u8C61\u6027\u80FD\u6BD4 JDK \u521B\u5EFA\u7684\u52A8\u6001\u4EE3\u7406\u5BF9\u8C61\u7684\u6027\u80FD\u9AD8\u4E0D\u5C11\uFF0C\u4F46\u662F CGLib \u5728\u521B\u5EFA\u4EE3\u7406\u5BF9\u8C61\u65F6\u6240\u82B1\u8D39\u7684\u65F6\u95F4\u5374\u6BD4 JDK \u591A\u5F97\u591A\uFF0C\u6240\u4EE5\u5BF9\u4E8E\u5355\u4F8B\u7684\u5BF9\u8C61\uFF0C\u56E0\u4E3A\u65E0\u9700\u9891\u7E41\u521B\u5EFA\u5BF9\u8C61\uFF0C\u7528 CGLib \u5408\u9002\uFF0C\u53CD\u4E4B\uFF0C\u4F7F\u7528 JDK \u65B9\u5F0F\u8981\u66F4\u4E3A\u5408\u9002\u4E00\u4E9B\u3002\u540C\u65F6\uFF0C\u7531\u4E8E CGLib \u7531\u4E8E\u662F\u91C7\u7528\u52A8\u6001\u521B\u5EFA\u5B50\u7C7B\u7684\u65B9\u6CD5\uFF0C\u5BF9\u4E8E final \u65B9\u6CD5\uFF0C\u65E0\u6CD5\u8FDB\u884C\u4EE3\u7406\u3002</li></ol><p>\u6211\u4EEC\u6765\u770B\u4E00\u4E2A\u5E38\u89C1\u7684\u5C0F\u573A\u666F\uFF0C\u5BA2\u670D\u4E2D\u8F6C\uFF0C\u89E3\u51B3\u7528\u6237\u95EE\u9898\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-c5c4b247-62dd-43a2-a043-da51c58f77c8.png" alt="\u7528\u6237\u5411\u5BA2\u670D\u63D0\u95EE\u9898"></p><p><strong>JDK \u52A8\u6001\u4EE3\u7406\u5B9E\u73B0\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-65b14a3f-2653-463e-af77-a8875d3d635c.png" alt="JDK\u52A8\u6001\u4EE3\u7406\u7C7B\u56FE"></p><ul><li><p>\u63A5\u53E3</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">ISolver</span> <span class="token punctuation">{</span>
    <span class="token keyword">void</span> <span class="token function">solve</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u76EE\u6807\u7C7B:\u9700\u8981\u5B9E\u73B0\u5BF9\u5E94\u63A5\u53E3</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Solver</span> <span class="token keyword">implements</span> <span class="token class-name">ISolver</span> <span class="token punctuation">{</span>
    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">solve</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;\u75AF\u72C2\u6389\u5934\u53D1\u89E3\u51B3\u95EE\u9898\u2026\u2026&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u6001\u4EE3\u7406\u5DE5\u5382:ProxyFactory\uFF0C\u76F4\u63A5\u7528\u53CD\u5C04\u65B9\u5F0F\u751F\u6210\u4E00\u4E2A\u76EE\u6807\u5BF9\u8C61\u7684\u4EE3\u7406\u5BF9\u8C61\uFF0C\u8FD9\u91CC\u7528\u4E86\u4E00\u4E2A\u533F\u540D\u5185\u90E8\u7C7B\u65B9\u5F0F\u91CD\u5199 InvocationHandler \u65B9\u6CD5\uFF0C\u5B9E\u73B0\u63A5\u53E3\u91CD\u5199\u4E5F\u5DEE\u4E0D\u591A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ProxyFactory</span> <span class="token punctuation">{</span>

    <span class="token comment">// \u7EF4\u62A4\u4E00\u4E2A\u76EE\u6807\u5BF9\u8C61</span>
    <span class="token keyword">private</span> <span class="token class-name">Object</span> target<span class="token punctuation">;</span>

    <span class="token keyword">public</span> <span class="token class-name">ProxyFactory</span><span class="token punctuation">(</span><span class="token class-name">Object</span> target<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>target <span class="token operator">=</span> target<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">// \u4E3A\u76EE\u6807\u5BF9\u8C61\u751F\u6210\u4EE3\u7406\u5BF9\u8C61</span>
    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">getProxyInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">return</span> <span class="token class-name">Proxy</span><span class="token punctuation">.</span><span class="token function">newProxyInstance</span><span class="token punctuation">(</span>target<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getClassLoader</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> target<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getInterfaces</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
                <span class="token keyword">new</span> <span class="token class-name">InvocationHandler</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                    <span class="token annotation punctuation">@Override</span>
                    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">invoke</span><span class="token punctuation">(</span><span class="token class-name">Object</span> proxy<span class="token punctuation">,</span> <span class="token class-name">Method</span> method<span class="token punctuation">,</span> <span class="token class-name">Object</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Throwable</span> <span class="token punctuation">{</span>
                        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;\u8BF7\u95EE\u6709\u4EC0\u4E48\u53EF\u4EE5\u5E2E\u5230\u60A8\uFF1F&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

                        <span class="token comment">// \u8C03\u7528\u76EE\u6807\u5BF9\u8C61\u65B9\u6CD5</span>
                        <span class="token class-name">Object</span> returnValue <span class="token operator">=</span> method<span class="token punctuation">.</span><span class="token function">invoke</span><span class="token punctuation">(</span>target<span class="token punctuation">,</span> args<span class="token punctuation">)</span><span class="token punctuation">;</span>

                        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;\u95EE\u9898\u5DF2\u7ECF\u89E3\u51B3\u5566\uFF01&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                        <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
                    <span class="token punctuation">}</span>
                <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u5BA2\u6237\u7AEF\uFF1AClient\uFF0C\u751F\u6210\u4E00\u4E2A\u4EE3\u7406\u5BF9\u8C61\u5B9E\u4F8B\uFF0C\u901A\u8FC7\u4EE3\u7406\u5BF9\u8C61\u8C03\u7528\u76EE\u6807\u5BF9\u8C61\u65B9\u6CD5</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Client</span> <span class="token punctuation">{</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">//\u76EE\u6807\u5BF9\u8C61:\u7A0B\u5E8F\u5458</span>
        <span class="token class-name">ISolver</span> developer <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Solver</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//\u4EE3\u7406\uFF1A\u5BA2\u670D\u5C0F\u59D0\u59D0</span>
        <span class="token class-name">ISolver</span> csProxy <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">ISolver</span><span class="token punctuation">)</span> <span class="token keyword">new</span> <span class="token class-name">ProxyFactory</span><span class="token punctuation">(</span>developer<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getProxyInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//\u76EE\u6807\u65B9\u6CD5\uFF1A\u89E3\u51B3\u95EE\u9898</span>
        csProxy<span class="token punctuation">.</span><span class="token function">solve</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li></ul><p><strong>Cglib \u52A8\u6001\u4EE3\u7406\u5B9E\u73B0\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-74da87af-20d1-4a5b-a212-3837a15f0bab.png" alt="Cglib\u52A8\u6001\u4EE3\u7406\u7C7B\u56FE"></p><ul><li><p>\u76EE\u6807\u7C7B\uFF1ASolver\uFF0C\u8FD9\u91CC\u76EE\u6807\u7C7B\u4E0D\u7528\u518D\u5B9E\u73B0\u63A5\u53E3\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Solver</span> <span class="token punctuation">{</span>

    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">solve</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;\u75AF\u72C2\u6389\u5934\u53D1\u89E3\u51B3\u95EE\u9898\u2026\u2026&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u52A8\u6001\u4EE3\u7406\u5DE5\u5382\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ProxyFactory</span> <span class="token keyword">implements</span> <span class="token class-name">MethodInterceptor</span> <span class="token punctuation">{</span>

   <span class="token comment">//\u7EF4\u62A4\u4E00\u4E2A\u76EE\u6807\u5BF9\u8C61</span>
    <span class="token keyword">private</span> <span class="token class-name">Object</span> target<span class="token punctuation">;</span>

    <span class="token keyword">public</span> <span class="token class-name">ProxyFactory</span><span class="token punctuation">(</span><span class="token class-name">Object</span> target<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>target <span class="token operator">=</span> target<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">//\u4E3A\u76EE\u6807\u5BF9\u8C61\u751F\u6210\u4EE3\u7406\u5BF9\u8C61</span>
    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">getProxyInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">//\u5DE5\u5177\u7C7B</span>
        <span class="token class-name">Enhancer</span> en <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Enhancer</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//\u8BBE\u7F6E\u7236\u7C7B</span>
        en<span class="token punctuation">.</span><span class="token function">setSuperclass</span><span class="token punctuation">(</span>target<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//\u8BBE\u7F6E\u56DE\u8C03\u51FD\u6570</span>
        en<span class="token punctuation">.</span><span class="token function">setCallback</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//\u521B\u5EFA\u5B50\u7C7B\u5BF9\u8C61\u4EE3\u7406</span>
        <span class="token keyword">return</span> en<span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">intercept</span><span class="token punctuation">(</span><span class="token class-name">Object</span> obj<span class="token punctuation">,</span> <span class="token class-name">Method</span> method<span class="token punctuation">,</span> <span class="token class-name">Object</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">,</span> <span class="token class-name">MethodProxy</span> proxy<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Throwable</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;\u8BF7\u95EE\u6709\u4EC0\u4E48\u53EF\u4EE5\u5E2E\u5230\u60A8\uFF1F&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// \u6267\u884C\u76EE\u6807\u5BF9\u8C61\u7684\u65B9\u6CD5</span>
        <span class="token class-name">Object</span> returnValue <span class="token operator">=</span> method<span class="token punctuation">.</span><span class="token function">invoke</span><span class="token punctuation">(</span>target<span class="token punctuation">,</span> args<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;\u95EE\u9898\u5DF2\u7ECF\u89E3\u51B3\u5566\uFF01&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u5BA2\u6237\u7AEF\uFF1AClient</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Client</span> <span class="token punctuation">{</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">//\u76EE\u6807\u5BF9\u8C61:\u7A0B\u5E8F\u5458</span>
        <span class="token class-name">Solver</span> developer <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Solver</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//\u4EE3\u7406\uFF1A\u5BA2\u670D\u5C0F\u59D0\u59D0</span>
        <span class="token class-name">Solver</span> csProxy <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">Solver</span><span class="token punctuation">)</span> <span class="token keyword">new</span> <span class="token class-name">ProxyFactory</span><span class="token punctuation">(</span>developer<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getProxyInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//\u76EE\u6807\u65B9\u6CD5\uFF1A\u89E3\u51B3\u95EE\u9898</span>
        csProxy<span class="token punctuation">.</span><span class="token function">solve</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li></ul><h3 id="_22-\u8BF4\u8BF4-spring-aop-\u548C-aspectj-aop-\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_22-\u8BF4\u8BF4-spring-aop-\u548C-aspectj-aop-\u533A\u522B" aria-hidden="true">#</a> 22.\u8BF4\u8BF4 Spring AOP \u548C AspectJ AOP \u533A\u522B?</h3><p><strong>Spring AOP</strong></p><p>Spring AOP \u5C5E\u4E8E<code>\u8FD0\u884C\u65F6\u589E\u5F3A</code>\uFF0C\u4E3B\u8981\u5177\u6709\u5982\u4E0B\u7279\u70B9\uFF1A</p><ol><li><p>\u57FA\u4E8E\u52A8\u6001\u4EE3\u7406\u6765\u5B9E\u73B0\uFF0C\u9ED8\u8BA4\u5982\u679C\u4F7F\u7528\u63A5\u53E3\u7684\uFF0C\u7528 JDK \u63D0\u4F9B\u7684\u52A8\u6001\u4EE3\u7406\u5B9E\u73B0\uFF0C\u5982\u679C\u662F\u65B9\u6CD5\u5219\u4F7F\u7528 CGLIB \u5B9E\u73B0</p></li><li><p>Spring AOP \u9700\u8981\u4F9D\u8D56 IOC \u5BB9\u5668\u6765\u7BA1\u7406\uFF0C\u5E76\u4E14\u53EA\u80FD\u4F5C\u7528\u4E8E Spring \u5BB9\u5668\uFF0C\u4F7F\u7528\u7EAF Java \u4EE3\u7801\u5B9E\u73B0</p></li><li><p>\u5728\u6027\u80FD\u4E0A\uFF0C\u7531\u4E8E Spring AOP \u662F\u57FA\u4E8E<strong>\u52A8\u6001\u4EE3\u7406</strong>\u6765\u5B9E\u73B0\u7684\uFF0C\u5728\u5BB9\u5668\u542F\u52A8\u65F6\u9700\u8981\u751F\u6210\u4EE3\u7406\u5B9E\u4F8B\uFF0C\u5728\u65B9\u6CD5\u8C03\u7528\u4E0A\u4E5F\u4F1A\u589E\u52A0\u6808\u7684\u6DF1\u5EA6\uFF0C\u4F7F\u5F97 Spring AOP \u7684\u6027\u80FD\u4E0D\u5982 AspectJ \u7684\u90A3\u4E48\u597D\u3002</p></li><li><p>Spring AOP \u81F4\u529B\u4E8E\u89E3\u51B3\u4F01\u4E1A\u7EA7\u5F00\u53D1\u4E2D\u6700\u666E\u904D\u7684 AOP(\u65B9\u6CD5\u7EC7\u5165)\u3002</p></li></ol><p><strong>AspectJ</strong></p><p>AspectJ \u662F\u4E00\u4E2A\u6613\u7528\u7684\u529F\u80FD\u5F3A\u5927\u7684 AOP \u6846\u67B6\uFF0C\u5C5E\u4E8E<code>\u7F16\u8BD1\u65F6\u589E\u5F3A</code>\uFF0C \u53EF\u4EE5\u5355\u72EC\u4F7F\u7528\uFF0C\u4E5F\u53EF\u4EE5\u6574\u5408\u5230\u5176\u5B83\u6846\u67B6\u4E2D\uFF0C\u662F AOP \u7F16\u7A0B\u7684\u5B8C\u5168\u89E3\u51B3\u65B9\u6848\u3002AspectJ \u9700\u8981\u7528\u5230\u5355\u72EC\u7684\u7F16\u8BD1\u5668 ajc\u3002</p><p>AspectJ \u5C5E\u4E8E<strong>\u9759\u6001\u7EC7\u5165</strong>\uFF0C\u901A\u8FC7\u4FEE\u6539\u4EE3\u7801\u6765\u5B9E\u73B0\uFF0C\u5728\u5B9E\u9645\u8FD0\u884C\u4E4B\u524D\u5C31\u5B8C\u6210\u4E86\u7EC7\u5165\uFF0C\u6240\u4EE5\u8BF4\u5B83\u751F\u6210\u7684\u7C7B\u662F\u6CA1\u6709\u989D\u5916\u8FD0\u884C\u65F6\u5F00\u9500\u7684\uFF0C\u4E00\u822C\u6709\u5982\u4E0B\u51E0\u4E2A\u7EC7\u5165\u7684\u65F6\u673A\uFF1A</p><ol><li><p>\u7F16\u8BD1\u671F\u7EC7\u5165\uFF08Compile-time weaving\uFF09\uFF1A\u5982\u7C7B A \u4F7F\u7528 AspectJ \u6DFB\u52A0\u4E86\u4E00\u4E2A\u5C5E\u6027\uFF0C\u7C7B B \u5F15\u7528\u4E86\u5B83\uFF0C\u8FD9\u4E2A\u573A\u666F\u5C31\u9700\u8981\u7F16\u8BD1\u671F\u7684\u65F6\u5019\u5C31\u8FDB\u884C\u7EC7\u5165\uFF0C\u5426\u5219\u6CA1\u6CD5\u7F16\u8BD1\u7C7B B\u3002</p></li><li><p>\u7F16\u8BD1\u540E\u7EC7\u5165\uFF08Post-compile weaving\uFF09\uFF1A\u4E5F\u5C31\u662F\u5DF2\u7ECF\u751F\u6210\u4E86 .class \u6587\u4EF6\uFF0C\u6216\u5DF2\u7ECF\u6253\u6210 jar \u5305\u4E86\uFF0C\u8FD9\u79CD\u60C5\u51B5\u6211\u4EEC\u9700\u8981\u589E\u5F3A\u5904\u7406\u7684\u8BDD\uFF0C\u5C31\u8981\u7528\u5230\u7F16\u8BD1\u540E\u7EC7\u5165\u3002</p></li><li><p>\u7C7B\u52A0\u8F7D\u540E\u7EC7\u5165\uFF08Load-time weaving\uFF09\uFF1A\u6307\u7684\u662F\u5728\u52A0\u8F7D\u7C7B\u7684\u65F6\u5019\u8FDB\u884C\u7EC7\u5165\uFF0C\u8981\u5B9E\u73B0\u8FD9\u4E2A\u65F6\u671F\u7684\u7EC7\u5165\uFF0C\u6709\u51E0\u79CD\u5E38\u89C1\u7684\u65B9\u6CD5</p></li></ol><p>\u6574\u4F53\u5BF9\u6BD4\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-d1dbe9d9-c55f-4293-8622-d9759064d613.png" alt="Spring AOP\u548CAspectJ\u5BF9\u6BD4"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u4E8B\u52A1" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1" aria-hidden="true">#</a> \u4E8B\u52A1</h2><p>Spring \u4E8B\u52A1\u7684\u672C\u8D28\u5176\u5B9E\u5C31\u662F\u6570\u636E\u5E93\u5BF9\u4E8B\u52A1\u7684\u652F\u6301\uFF0C\u6CA1\u6709\u6570\u636E\u5E93\u7684\u4E8B\u52A1\u652F\u6301\uFF0CSpring \u662F\u65E0\u6CD5\u63D0\u4F9B\u4E8B\u52A1\u529F\u80FD\u7684\u3002Spring \u53EA\u63D0\u4F9B\u7EDF\u4E00\u4E8B\u52A1\u7BA1\u7406\u63A5\u53E3\uFF0C\u5177\u4F53\u5B9E\u73B0\u90FD\u662F\u7531\u5404\u6570\u636E\u5E93\u81EA\u5DF1\u5B9E\u73B0\uFF0C\u6570\u636E\u5E93\u4E8B\u52A1\u7684\u63D0\u4EA4\u548C\u56DE\u6EDA\u662F\u901A\u8FC7\u6570\u636E\u5E93\u81EA\u5DF1\u7684\u4E8B\u52A1\u673A\u5236\u5B9E\u73B0\u3002</p><h3 id="_23-spring-\u4E8B\u52A1\u7684\u79CD\u7C7B" tabindex="-1"><a class="header-anchor" href="#_23-spring-\u4E8B\u52A1\u7684\u79CD\u7C7B" aria-hidden="true">#</a> 23.Spring \u4E8B\u52A1\u7684\u79CD\u7C7B\uFF1F</h3><p>Spring \u652F\u6301<code>\u7F16\u7A0B\u5F0F\u4E8B\u52A1</code>\u7BA1\u7406\u548C<code>\u58F0\u660E\u5F0F</code>\u4E8B\u52A1\u7BA1\u7406\u4E24\u79CD\u65B9\u5F0F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-d3ee77fa-926d-4c39-91f8-a8b1544a9134.png" alt="Spring\u4E8B\u52A1\u5206\u7C7B"></p><ol><li>\u7F16\u7A0B\u5F0F\u4E8B\u52A1</li></ol><p>\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u7BA1\u7406\u4F7F\u7528 TransactionTemplate\uFF0C\u9700\u8981\u663E\u5F0F\u6267\u884C\u4E8B\u52A1\u3002</p><ol start="2"><li><p>\u58F0\u660E\u5F0F\u4E8B\u52A1</p></li><li><p>\u58F0\u660E\u5F0F\u4E8B\u52A1\u7BA1\u7406\u5EFA\u7ACB\u5728 AOP \u4E4B\u4E0A\u7684\u3002\u5176\u672C\u8D28\u662F\u901A\u8FC7 AOP \u529F\u80FD\uFF0C\u5BF9\u65B9\u6CD5\u524D\u540E\u8FDB\u884C\u62E6\u622A\uFF0C\u5C06\u4E8B\u52A1\u5904\u7406\u7684\u529F\u80FD\u7F16\u7EC7\u5230\u62E6\u622A\u7684\u65B9\u6CD5\u4E2D\uFF0C\u4E5F\u5C31\u662F\u5728\u76EE\u6807\u65B9\u6CD5\u5F00\u59CB\u4E4B\u524D\u542F\u52A8\u4E00\u4E2A\u4E8B\u52A1\uFF0C\u5728\u6267\u884C\u5B8C\u76EE\u6807\u65B9\u6CD5\u4E4B\u540E\u6839\u636E\u6267\u884C\u60C5\u51B5\u63D0\u4EA4\u6216\u8005\u56DE\u6EDA\u4E8B\u52A1</p></li><li><p>\u4F18\u70B9\u662F\u4E0D\u9700\u8981\u5728\u4E1A\u52A1\u903B\u8F91\u4EE3\u7801\u4E2D\u63BA\u6742\u4E8B\u52A1\u7BA1\u7406\u7684\u4EE3\u7801\uFF0C\u53EA\u9700\u5728\u914D\u7F6E\u6587\u4EF6\u4E2D\u505A\u76F8\u5173\u7684\u4E8B\u52A1\u89C4\u5219\u58F0\u660E\u6216\u901A\u8FC7 @Transactional \u6CE8\u89E3\u7684\u65B9\u5F0F\uFF0C\u4FBF\u53EF\u4EE5\u5C06\u4E8B\u52A1\u89C4\u5219\u5E94\u7528\u5230\u4E1A\u52A1\u903B\u8F91\u4E2D\uFF0C\u51CF\u5C11\u4E1A\u52A1\u4EE3\u7801\u7684\u6C61\u67D3\u3002\u552F\u4E00\u4E0D\u8DB3\u5730\u65B9\u662F\uFF0C\u6700\u7EC6\u7C92\u5EA6\u53EA\u80FD\u4F5C\u7528\u5230\u65B9\u6CD5\u7EA7\u522B\uFF0C\u65E0\u6CD5\u505A\u5230\u50CF\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u90A3\u6837\u53EF\u4EE5\u4F5C\u7528\u5230\u4EE3\u7801\u5757\u7EA7\u522B\u3002</p></li></ol><h3 id="_24-spring-\u7684\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B" tabindex="-1"><a class="header-anchor" href="#_24-spring-\u7684\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B" aria-hidden="true">#</a> 24.Spring \u7684\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\uFF1F</h3><p>Spring \u7684\u63A5\u53E3 TransactionDefinition \u4E2D\u5B9A\u4E49\u4E86\u8868\u793A\u9694\u79BB\u7EA7\u522B\u7684\u5E38\u91CF\uFF0C\u5F53\u7136\u5176\u5B9E\u4E3B\u8981\u8FD8\u662F\u5BF9\u5E94\u6570\u636E\u5E93\u7684\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\uFF1A</p><ol><li>ISOLATION_DEFAULT\uFF1A\u4F7F\u7528\u540E\u7AEF\u6570\u636E\u5E93\u9ED8\u8BA4\u7684\u9694\u79BB\u754C\u522B\uFF0CMySQL \u9ED8\u8BA4\u53EF\u91CD\u590D\u8BFB\uFF0COracle \u9ED8\u8BA4\u8BFB\u5DF2\u63D0\u4EA4\u3002</li><li>ISOLATION_READ_UNCOMMITTED\uFF1A\u8BFB\u672A\u63D0\u4EA4</li><li>ISOLATION_READ_COMMITTED\uFF1A\u8BFB\u5DF2\u63D0\u4EA4</li><li>ISOLATION_REPEATABLE_READ\uFF1A\u53EF\u91CD\u590D\u8BFB</li><li>ISOLATION_SERIALIZABLE\uFF1A\u4E32\u884C\u5316</li></ol><h3 id="_25-spring-\u7684\u4E8B\u52A1\u4F20\u64AD\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#_25-spring-\u7684\u4E8B\u52A1\u4F20\u64AD\u673A\u5236" aria-hidden="true">#</a> 25.Spring \u7684\u4E8B\u52A1\u4F20\u64AD\u673A\u5236\uFF1F</h3><p>Spring \u4E8B\u52A1\u7684\u4F20\u64AD\u673A\u5236\u8BF4\u7684\u662F\uFF0C\u5F53\u591A\u4E2A\u4E8B\u52A1\u540C\u65F6\u5B58\u5728\u7684\u65F6\u5019\u2014\u2014\u4E00\u822C\u6307\u7684\u662F\u591A\u4E2A\u4E8B\u52A1\u65B9\u6CD5\u76F8\u4E92\u8C03\u7528\u65F6\uFF0CSpring \u5982\u4F55\u5904\u7406\u8FD9\u4E9B\u4E8B\u52A1\u7684\u884C\u4E3A\u3002</p><p>\u4E8B\u52A1\u4F20\u64AD\u673A\u5236\u662F\u4F7F\u7528\u7B80\u5355\u7684 ThreadLocal \u5B9E\u73B0\u7684\uFF0C\u6240\u4EE5\uFF0C\u5982\u679C\u8C03\u7528\u7684\u65B9\u6CD5\u662F\u5728\u65B0\u7EBF\u7A0B\u8C03\u7528\u7684\uFF0C\u4E8B\u52A1\u4F20\u64AD\u5B9E\u9645\u4E0A\u662F\u4F1A\u5931\u6548\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-a6e2a8dc-9771-4d8b-9d91-76ddee98af1a.png" alt="7\u79CD\u4E8B\u52A1\u4F20\u64AD\u673A\u5236"></p><p>Spring \u9ED8\u8BA4\u7684\u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A\u662F PROPAFATION_REQUIRED\uFF0C\u5B83\u9002\u5408\u7EDD\u5927\u591A\u6570\u60C5\u51B5\uFF0C\u5982\u679C\u591A\u4E2A ServiceX#methodX()\u90FD\u5DE5\u4F5C\u5728\u4E8B\u52A1\u73AF\u5883\u4E0B\uFF08\u5747\u88AB Spring \u4E8B\u52A1\u589E\u5F3A\uFF09\uFF0C\u4E14\u7A0B\u5E8F\u4E2D\u5B58\u5728\u8C03\u7528\u94FE <code>Service1#method1()-&gt;Service2#method2()-&gt;Service3#method3()</code>\uFF0C\u90A3\u4E48\u8FD9 3 \u4E2A\u670D\u52A1\u7C7B\u7684\u4E09\u4E2A\u65B9\u6CD5\u901A\u8FC7 Spring \u7684\u4E8B\u52A1\u4F20\u64AD\u673A\u5236\u90FD\u5DE5\u4F5C\u5728\u540C\u4E00\u4E2A\u4E8B\u52A1\u4E2D\u3002</p><h3 id="_26-\u58F0\u660E\u5F0F\u4E8B\u52A1\u5B9E\u73B0\u539F\u7406\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_26-\u58F0\u660E\u5F0F\u4E8B\u52A1\u5B9E\u73B0\u539F\u7406\u4E86\u89E3\u5417" aria-hidden="true">#</a> 26.\u58F0\u660E\u5F0F\u4E8B\u52A1\u5B9E\u73B0\u539F\u7406\u4E86\u89E3\u5417\uFF1F</h3><p>\u5C31\u662F\u901A\u8FC7 AOP/\u52A8\u6001\u4EE3\u7406\u3002</p><ul><li><p><strong>\u5728 Bean \u521D\u59CB\u5316\u9636\u6BB5\u521B\u5EFA\u4EE3\u7406\u5BF9\u8C61</strong>\uFF1ASpring \u5BB9\u5668\u5728\u521D\u59CB\u5316\u6BCF\u4E2A\u5355\u4F8B bean \u7684\u65F6\u5019\uFF0C\u4F1A\u904D\u5386\u5BB9\u5668\u4E2D\u7684\u6240\u6709 BeanPostProcessor \u5B9E\u73B0\u7C7B\uFF0C\u5E76\u6267\u884C\u5176 postProcessAfterInitialization \u65B9\u6CD5\uFF0C\u5728\u6267\u884C AbstractAutoProxyCreator \u7C7B\u7684 postProcessAfterInitialization \u65B9\u6CD5\u65F6\u4F1A\u904D\u5386\u5BB9\u5668\u4E2D\u6240\u6709\u7684\u5207\u9762\uFF0C\u67E5\u627E\u4E0E\u5F53\u524D\u5B9E\u4F8B\u5316 bean \u5339\u914D\u7684\u5207\u9762\uFF0C\u8FD9\u91CC\u4F1A\u83B7\u53D6\u4E8B\u52A1\u5C5E\u6027\u5207\u9762\uFF0C\u67E5\u627E@Transactional \u6CE8\u89E3\u53CA\u5176\u5C5E\u6027\u503C\uFF0C\u7136\u540E\u6839\u636E\u5F97\u5230\u7684\u5207\u9762\u521B\u5EFA\u4E00\u4E2A\u4EE3\u7406\u5BF9\u8C61\uFF0C\u9ED8\u8BA4\u662F\u4F7F\u7528 JDK \u52A8\u6001\u4EE3\u7406\u521B\u5EFA\u4EE3\u7406\uFF0C\u5982\u679C\u76EE\u6807\u7C7B\u662F\u63A5\u53E3\uFF0C\u5219\u4F7F\u7528 JDK \u52A8\u6001\u4EE3\u7406\uFF0C\u5426\u5219\u4F7F\u7528 Cglib\u3002</p></li><li><p><strong>\u5728\u6267\u884C\u76EE\u6807\u65B9\u6CD5\u65F6\u8FDB\u884C\u4E8B\u52A1\u589E\u5F3A\u64CD\u4F5C</strong>\uFF1A\u5F53\u901A\u8FC7\u4EE3\u7406\u5BF9\u8C61\u8C03\u7528 Bean \u65B9\u6CD5\u7684\u65F6\u5019\uFF0C\u4F1A\u89E6\u53D1\u5BF9\u5E94\u7684 AOP \u589E\u5F3A\u62E6\u622A\u5668\uFF0C\u58F0\u660E\u5F0F\u4E8B\u52A1\u662F\u4E00\u79CD\u73AF\u7ED5\u589E\u5F3A\uFF0C\u5BF9\u5E94\u63A5\u53E3\u4E3A<code>MethodInterceptor</code>\uFF0C\u4E8B\u52A1\u589E\u5F3A\u5BF9\u8BE5\u63A5\u53E3\u7684\u5B9E\u73B0\u4E3A<code>TransactionInterceptor</code>\uFF0C\u7C7B\u56FE\u5982\u4E0B\uFF1A</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-97493c7f-c596-4e98-a6a8-dab254d6d1ab.png" alt="\u56FE\u7247\u6765\u6E90\u7F51\u6613\u6280\u672F\u4E13\u680F"></p><p>\u4E8B\u52A1\u62E6\u622A\u5668<code>TransactionInterceptor</code>\u5728<code>invoke</code>\u65B9\u6CD5\u4E2D\uFF0C\u901A\u8FC7\u8C03\u7528\u7236\u7C7B<code>TransactionAspectSupport</code>\u7684<code>invokeWithinTransaction</code>\u65B9\u6CD5\u8FDB\u884C\u4E8B\u52A1\u5904\u7406\uFF0C\u5305\u62EC\u5F00\u542F\u4E8B\u52A1\u3001\u4E8B\u52A1\u63D0\u4EA4\u3001\u5F02\u5E38\u56DE\u6EDA\u3002</p><h3 id="_27-\u58F0\u660E\u5F0F\u4E8B\u52A1\u5728\u54EA\u4E9B\u60C5\u51B5\u4E0B\u4F1A\u5931\u6548" tabindex="-1"><a class="header-anchor" href="#_27-\u58F0\u660E\u5F0F\u4E8B\u52A1\u5728\u54EA\u4E9B\u60C5\u51B5\u4E0B\u4F1A\u5931\u6548" aria-hidden="true">#</a> 27.\u58F0\u660E\u5F0F\u4E8B\u52A1\u5728\u54EA\u4E9B\u60C5\u51B5\u4E0B\u4F1A\u5931\u6548\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-381e4ec9-a235-4cfa-9b4d-518095a7502a.png" alt="\u58F0\u660E\u5F0F\u4E8B\u52A1\u7684\u51E0\u79CD\u5931\u6548\u7684\u60C5\u51B5"></p><p><strong>1\u3001@Transactional \u5E94\u7528\u5728\u975E public \u4FEE\u9970\u7684\u65B9\u6CD5\u4E0A</strong></p><p>\u5982\u679C Transactional \u6CE8\u89E3\u5E94\u7528\u5728\u975E public \u4FEE\u9970\u7684\u65B9\u6CD5\u4E0A\uFF0CTransactional \u5C06\u4F1A\u5931\u6548\u3002</p><p>\u662F\u56E0\u4E3A\u5728 Spring AOP \u4EE3\u7406\u65F6\uFF0CTransactionInterceptor \uFF08\u4E8B\u52A1\u62E6\u622A\u5668\uFF09\u5728\u76EE\u6807\u65B9\u6CD5\u6267\u884C\u524D\u540E\u8FDB\u884C\u62E6\u622A\uFF0CDynamicAdvisedInterceptor\uFF08CglibAopProxy \u7684\u5185\u90E8\u7C7B\uFF09\u7684 intercept \u65B9\u6CD5 \u6216 JdkDynamicAopProxy \u7684 invoke \u65B9\u6CD5\u4F1A\u95F4\u63A5\u8C03\u7528 AbstractFallbackTransactionAttributeSource \u7684 <strong>computeTransactionAttribute</strong>\u65B9\u6CD5\uFF0C\u83B7\u53D6 Transactional \u6CE8\u89E3\u7684\u4E8B\u52A1\u914D\u7F6E\u4FE1\u606F\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">protected</span> <span class="token class-name">TransactionAttribute</span> <span class="token function">computeTransactionAttribute</span><span class="token punctuation">(</span><span class="token class-name">Method</span> method<span class="token punctuation">,</span>
    <span class="token class-name">Class</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span><span class="token punctuation">&gt;</span></span> targetClass<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">// Don&#39;t allow no-public methods as required.</span>
        <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">allowPublicMethodsOnly</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token operator">!</span><span class="token class-name">Modifier</span><span class="token punctuation">.</span><span class="token function">isPublic</span><span class="token punctuation">(</span>method<span class="token punctuation">.</span><span class="token function">getModifiers</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u6B64\u65B9\u6CD5\u4F1A\u68C0\u67E5\u76EE\u6807\u65B9\u6CD5\u7684\u4FEE\u9970\u7B26\u662F\u5426\u4E3A public\uFF0C\u4E0D\u662F public \u5219\u4E0D\u4F1A\u83B7\u53D6@Transactional \u7684\u5C5E\u6027\u914D\u7F6E\u4FE1\u606F\u3002</p><p><strong>2\u3001@Transactional \u6CE8\u89E3\u5C5E\u6027 propagation \u8BBE\u7F6E\u9519\u8BEF</strong></p><ul><li>TransactionDefinition.PROPAGATION_SUPPORTS\uFF1A\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u52A0\u5165\u8BE5\u4E8B\u52A1\uFF1B\u5982\u679C\u5F53\u524D\u6CA1\u6709\u4E8B\u52A1\uFF0C\u5219\u4EE5\u975E\u4E8B\u52A1\u7684\u65B9\u5F0F\u7EE7\u7EED\u8FD0\u884C\u3002</li><li>TransactionDefinition.PROPAGATION_NOT_SUPPORTED\uFF1A\u4EE5\u975E\u4E8B\u52A1\u65B9\u5F0F\u8FD0\u884C\uFF0C\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u628A\u5F53\u524D\u4E8B\u52A1\u6302\u8D77\u3002</li><li>TransactionDefinition.PROPAGATION_NEVER\uFF1A\u4EE5\u975E\u4E8B\u52A1\u65B9\u5F0F\u8FD0\u884C\uFF0C\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u629B\u51FA\u5F02\u5E38\u3002</li></ul><p><strong>3\u3001@Transactional \u6CE8\u89E3\u5C5E\u6027 rollbackFor \u8BBE\u7F6E\u9519\u8BEF</strong></p><p>rollbackFor \u53EF\u4EE5\u6307\u5B9A\u80FD\u591F\u89E6\u53D1\u4E8B\u52A1\u56DE\u6EDA\u7684\u5F02\u5E38\u7C7B\u578B\u3002Spring \u9ED8\u8BA4\u629B\u51FA\u4E86\u672A\u68C0\u67E5 unchecked \u5F02\u5E38\uFF08\u7EE7\u627F\u81EA RuntimeException \u7684\u5F02\u5E38\uFF09\u6216\u8005 Error \u624D\u56DE\u6EDA\u4E8B\u52A1\uFF0C\u5176\u4ED6\u5F02\u5E38\u4E0D\u4F1A\u89E6\u53D1\u56DE\u6EDA\u4E8B\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-04053b02-3264-4d7f-b868-560a0333f08d.png" alt="Spring\u9ED8\u8BA4\u652F\u6301\u7684\u5F02\u5E38\u56DE\u6EDA"></p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// \u5E0C\u671B\u81EA\u5B9A\u4E49\u7684\u5F02\u5E38\u53EF\u4EE5\u8FDB\u884C\u56DE\u6EDA</span>
<span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span>propagation<span class="token operator">=</span> <span class="token class-name">Propagation</span><span class="token punctuation">.</span>REQUIRED<span class="token punctuation">,</span>rollbackFor<span class="token operator">=</span> <span class="token class-name">MyException</span><span class="token punctuation">.</span><span class="token keyword">class</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u82E5\u5728\u76EE\u6807\u65B9\u6CD5\u4E2D\u629B\u51FA\u7684\u5F02\u5E38\u662F rollbackFor \u6307\u5B9A\u7684\u5F02\u5E38\u7684\u5B50\u7C7B\uFF0C\u4E8B\u52A1\u540C\u6837\u4F1A\u56DE\u6EDA\u3002</p><p><strong>4\u3001\u540C\u4E00\u4E2A\u7C7B\u4E2D\u65B9\u6CD5\u8C03\u7528\uFF0C\u5BFC\u81F4@Transactional \u5931\u6548</strong></p><p>\u5F00\u53D1\u4E2D\u907F\u514D\u4E0D\u4E86\u4F1A\u5BF9\u540C\u4E00\u4E2A\u7C7B\u91CC\u9762\u7684\u65B9\u6CD5\u8C03\u7528\uFF0C\u6BD4\u5982\u6709\u4E00\u4E2A\u7C7B Test\uFF0C\u5B83\u7684\u4E00\u4E2A\u65B9\u6CD5 A\uFF0CA \u518D\u8C03\u7528\u672C\u7C7B\u7684\u65B9\u6CD5 B\uFF08\u4E0D\u8BBA\u65B9\u6CD5 B \u662F\u7528 public \u8FD8\u662F private \u4FEE\u9970\uFF09\uFF0C\u4F46\u65B9\u6CD5 A \u6CA1\u6709\u58F0\u660E\u6CE8\u89E3\u4E8B\u52A1\uFF0C\u800C B \u65B9\u6CD5\u6709\u3002\u5219\u5916\u90E8\u8C03\u7528\u65B9\u6CD5 A \u4E4B\u540E\uFF0C\u65B9\u6CD5 B \u7684\u4E8B\u52A1\u662F\u4E0D\u4F1A\u8D77\u4F5C\u7528\u7684\u3002\u8FD9\u4E5F\u662F\u7ECF\u5E38\u72AF\u9519\u8BEF\u7684\u4E00\u4E2A\u5730\u65B9\u3002</p><p>\u90A3\u4E3A\u5565\u4F1A\u51FA\u73B0\u8FD9\u79CD\u60C5\u51B5\uFF1F\u5176\u5B9E\u8FD9\u8FD8\u662F\u7531\u4E8E\u4F7F\u7528 Spring AOP \u4EE3\u7406\u9020\u6210\u7684\uFF0C\u56E0\u4E3A\u53EA\u6709\u5F53\u4E8B\u52A1\u65B9\u6CD5\u88AB\u5F53\u524D\u7C7B\u4EE5\u5916\u7684\u4EE3\u7801\u8C03\u7528\u65F6\uFF0C\u624D\u4F1A\u7531 Spring \u751F\u6210\u7684\u4EE3\u7406\u5BF9\u8C61\u6765\u7BA1\u7406\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code> <span class="token comment">//@Transactional</span>
     <span class="token annotation punctuation">@GetMapping</span><span class="token punctuation">(</span><span class="token string">&quot;/test&quot;</span><span class="token punctuation">)</span>
     <span class="token keyword">private</span> <span class="token class-name">Integer</span> <span class="token class-name">A</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span>
         <span class="token class-name">CityInfoDict</span> cityInfoDict <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">CityInfoDict</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
         cityInfoDict<span class="token punctuation">.</span><span class="token function">setCityName</span><span class="token punctuation">(</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
         <span class="token doc-comment comment">/**
          * B \u63D2\u5165\u5B57\u6BB5\u4E3A 3\u7684\u6570\u636E
          */</span>
         <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">insertB</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token doc-comment comment">/**
         * A \u63D2\u5165\u5B57\u6BB5\u4E3A 2\u7684\u6570\u636E
         */</span>
        <span class="token keyword">int</span> insert <span class="token operator">=</span> cityInfoDictMapper<span class="token punctuation">.</span><span class="token function">insert</span><span class="token punctuation">(</span>cityInfoDict<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">return</span> insert<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
    <span class="token keyword">public</span> <span class="token class-name">Integer</span> <span class="token function">insertB</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span>
        <span class="token class-name">CityInfoDict</span> cityInfoDict <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">CityInfoDict</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        cityInfoDict<span class="token punctuation">.</span><span class="token function">setCityName</span><span class="token punctuation">(</span><span class="token string">&quot;3&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        cityInfoDict<span class="token punctuation">.</span><span class="token function">setParentCityId</span><span class="token punctuation">(</span><span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

        <span class="token keyword">return</span> cityInfoDictMapper<span class="token punctuation">.</span><span class="token function">insert</span><span class="token punctuation">(</span>cityInfoDict<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u8FD9\u79CD\u60C5\u51B5\u662F\u6700\u5E38\u89C1\u7684\u4E00\u79CD@Transactional \u6CE8\u89E3\u5931\u6548\u573A\u666F</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span>
<span class="token keyword">private</span> <span class="token class-name">Integer</span> <span class="token class-name">A</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span>
    <span class="token keyword">int</span> insert <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
    <span class="token keyword">try</span> <span class="token punctuation">{</span>
        <span class="token class-name">CityInfoDict</span> cityInfoDict <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">CityInfoDict</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        cityInfoDict<span class="token punctuation">.</span><span class="token function">setCityName</span><span class="token punctuation">(</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        cityInfoDict<span class="token punctuation">.</span><span class="token function">setParentCityId</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token doc-comment comment">/**
         * A \u63D2\u5165\u5B57\u6BB5\u4E3A 2\u7684\u6570\u636E
         */</span>
        insert <span class="token operator">=</span> cityInfoDictMapper<span class="token punctuation">.</span><span class="token function">insert</span><span class="token punctuation">(</span>cityInfoDict<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token doc-comment comment">/**
         * B \u63D2\u5165\u5B57\u6BB5\u4E3A 3\u7684\u6570\u636E
        */</span>
        b<span class="token punctuation">.</span><span class="token function">insertB</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5982\u679C B \u65B9\u6CD5\u5185\u90E8\u629B\u4E86\u5F02\u5E38\uFF0C\u800C A \u65B9\u6CD5\u6B64\u65F6 try catch \u4E86 B \u65B9\u6CD5\u7684\u5F02\u5E38\uFF0C\u90A3\u8FD9\u4E2A\u4E8B\u52A1\u5C31\u4E0D\u80FD\u6B63\u5E38\u56DE\u6EDA\u4E86\uFF0C\u4F1A\u629B\u51FA\u5F02\u5E38\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name"><span class="token namespace">org<span class="token punctuation">.</span>springframework<span class="token punctuation">.</span>transaction<span class="token punctuation">.</span></span>UnexpectedRollbackException</span><span class="token operator">:</span> <span class="token class-name">Transaction</span> rolled back because it has been marked as rollback<span class="token operator">-</span>only
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="mvc" tabindex="-1"><a class="header-anchor" href="#mvc" aria-hidden="true">#</a> MVC</h2><h3 id="_28-spring-mvc-\u7684\u6838\u5FC3\u7EC4\u4EF6" tabindex="-1"><a class="header-anchor" href="#_28-spring-mvc-\u7684\u6838\u5FC3\u7EC4\u4EF6" aria-hidden="true">#</a> 28.Spring MVC \u7684\u6838\u5FC3\u7EC4\u4EF6\uFF1F</h3><ol><li><strong>DispatcherServlet</strong>\uFF1A\u524D\u7F6E\u63A7\u5236\u5668\uFF0C\u662F\u6574\u4E2A\u6D41\u7A0B\u63A7\u5236\u7684<strong>\u6838\u5FC3</strong>\uFF0C\u63A7\u5236\u5176\u4ED6\u7EC4\u4EF6\u7684\u6267\u884C\uFF0C\u8FDB\u884C\u7EDF\u4E00\u8C03\u5EA6\uFF0C\u964D\u4F4E\u7EC4\u4EF6\u4E4B\u95F4\u7684\u8026\u5408\u6027\uFF0C\u76F8\u5F53\u4E8E\u603B\u6307\u6325\u3002</li><li><strong>Handler</strong>\uFF1A\u5904\u7406\u5668\uFF0C\u5B8C\u6210\u5177\u4F53\u7684\u4E1A\u52A1\u903B\u8F91\uFF0C\u76F8\u5F53\u4E8E Servlet \u6216 Action\u3002</li><li><strong>HandlerMapping</strong>\uFF1ADispatcherServlet \u63A5\u6536\u5230\u8BF7\u6C42\u4E4B\u540E\uFF0C\u901A\u8FC7 HandlerMapping \u5C06\u4E0D\u540C\u7684\u8BF7\u6C42\u6620\u5C04\u5230\u4E0D\u540C\u7684 Handler\u3002</li><li><strong>HandlerInterceptor</strong>\uFF1A\u5904\u7406\u5668\u62E6\u622A\u5668\uFF0C\u662F\u4E00\u4E2A\u63A5\u53E3\uFF0C\u5982\u679C\u9700\u8981\u5B8C\u6210\u4E00\u4E9B\u62E6\u622A\u5904\u7406\uFF0C\u53EF\u4EE5\u5B9E\u73B0\u8BE5\u63A5\u53E3\u3002</li><li><strong>HandlerExecutionChain</strong>\uFF1A\u5904\u7406\u5668\u6267\u884C\u94FE\uFF0C\u5305\u62EC\u4E24\u90E8\u5206\u5185\u5BB9\uFF1AHandler \u548C HandlerInterceptor\uFF08\u7CFB\u7EDF\u4F1A\u6709\u4E00\u4E2A\u9ED8\u8BA4\u7684 HandlerInterceptor\uFF0C\u5982\u679C\u9700\u8981\u989D\u5916\u8BBE\u7F6E\u62E6\u622A\uFF0C\u53EF\u4EE5\u6DFB\u52A0\u62E6\u622A\u5668\uFF09\u3002</li><li><strong>HandlerAdapter</strong>\uFF1A\u5904\u7406\u5668\u9002\u914D\u5668\uFF0CHandler \u6267\u884C\u4E1A\u52A1\u65B9\u6CD5\u4E4B\u524D\uFF0C\u9700\u8981\u8FDB\u884C\u4E00\u7CFB\u5217\u7684\u64CD\u4F5C\uFF0C\u5305\u62EC\u8868\u5355\u6570\u636E\u7684\u9A8C\u8BC1\u3001\u6570\u636E\u7C7B\u578B\u7684\u8F6C\u6362\u3001\u5C06\u8868\u5355\u6570\u636E\u5C01\u88C5\u5230 JavaBean \u7B49\uFF0C\u8FD9\u4E9B\u64CD\u4F5C\u90FD\u662F\u7531 HandlerApater \u6765\u5B8C\u6210\uFF0C\u5F00\u53D1\u8005\u53EA\u9700\u5C06\u6CE8\u610F\u529B\u96C6\u4E2D\u4E1A\u52A1\u903B\u8F91\u7684\u5904\u7406\u4E0A\uFF0CDispatcherServlet \u901A\u8FC7 HandlerAdapter \u6267\u884C\u4E0D\u540C\u7684 Handler\u3002</li><li><strong>ModelAndView</strong>\uFF1A\u88C5\u8F7D\u4E86\u6A21\u578B\u6570\u636E\u548C\u89C6\u56FE\u4FE1\u606F\uFF0C\u4F5C\u4E3A Handler \u7684\u5904\u7406\u7ED3\u679C\uFF0C\u8FD4\u56DE\u7ED9 DispatcherServlet\u3002</li><li><strong>ViewResolver</strong>\uFF1A\u89C6\u56FE\u89E3\u6790\u5668\uFF0CDispatcheServlet \u901A\u8FC7\u5B83\u5C06\u903B\u8F91\u89C6\u56FE\u89E3\u6790\u4E3A\u7269\u7406\u89C6\u56FE\uFF0C\u6700\u7EC8\u5C06\u6E32\u67D3\u7ED3\u679C\u54CD\u5E94\u7ED9\u5BA2\u6237\u7AEF\u3002</li></ol><h3 id="_29-spring-mvc-\u7684\u5DE5\u4F5C\u6D41\u7A0B" tabindex="-1"><a class="header-anchor" href="#_29-spring-mvc-\u7684\u5DE5\u4F5C\u6D41\u7A0B" aria-hidden="true">#</a> 29.Spring MVC \u7684\u5DE5\u4F5C\u6D41\u7A0B\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-e29a122b-db07-48b8-8289-7251032e87a1.png" alt="Spring MVC\u7684\u5DE5\u4F5C\u6D41\u7A0B"></p><ol><li>\u5BA2\u6237\u7AEF\u5411\u670D\u52A1\u7AEF\u53D1\u9001\u4E00\u6B21\u8BF7\u6C42\uFF0C\u8FD9\u4E2A\u8BF7\u6C42\u4F1A\u5148\u5230\u524D\u7AEF\u63A7\u5236\u5668 DispatcherServlet(\u4E5F\u53EB\u4E2D\u592E\u63A7\u5236\u5668)\u3002</li><li>DispatcherServlet \u63A5\u6536\u5230\u8BF7\u6C42\u540E\u4F1A\u8C03\u7528 HandlerMapping \u5904\u7406\u5668\u6620\u5C04\u5668\u3002\u7531\u6B64\u5F97\u77E5\uFF0C\u8BE5\u8BF7\u6C42\u8BE5\u7531\u54EA\u4E2A Controller \u6765\u5904\u7406\uFF08\u5E76\u672A\u8C03\u7528 Controller\uFF0C\u53EA\u662F\u5F97\u77E5\uFF09</li><li>DispatcherServlet \u8C03\u7528 HandlerAdapter \u5904\u7406\u5668\u9002\u914D\u5668\uFF0C\u544A\u8BC9\u5904\u7406\u5668\u9002\u914D\u5668\u5E94\u8BE5\u8981\u53BB\u6267\u884C\u54EA\u4E2A Controller</li><li>HandlerAdapter \u5904\u7406\u5668\u9002\u914D\u5668\u53BB\u6267\u884C Controller \u5E76\u5F97\u5230 ModelAndView(\u6570\u636E\u548C\u89C6\u56FE)\uFF0C\u5E76\u5C42\u5C42\u8FD4\u56DE\u7ED9 DispatcherServlet</li><li>DispatcherServlet \u5C06 ModelAndView \u4EA4\u7ED9 ViewReslover \u89C6\u56FE\u89E3\u6790\u5668\u89E3\u6790\uFF0C\u7136\u540E\u8FD4\u56DE\u771F\u6B63\u7684\u89C6\u56FE\u3002</li><li>DispatcherServlet \u5C06\u6A21\u578B\u6570\u636E\u586B\u5145\u5230\u89C6\u56FE\u4E2D</li><li>DispatcherServlet \u5C06\u7ED3\u679C\u54CD\u5E94\u7ED9\u5BA2\u6237\u7AEF</li></ol><p><strong>Spring MVC</strong> \u867D\u7136\u6574\u4F53\u6D41\u7A0B\u590D\u6742\uFF0C\u4F46\u662F\u5B9E\u9645\u5F00\u53D1\u4E2D\u5F88\u7B80\u5355\uFF0C\u5927\u90E8\u5206\u7684\u7EC4\u4EF6\u4E0D\u9700\u8981\u5F00\u53D1\u4EBA\u5458\u521B\u5EFA\u548C\u7BA1\u7406\uFF0C\u53EA\u9700\u8981\u901A\u8FC7\u914D\u7F6E\u6587\u4EF6\u7684\u65B9\u5F0F\u5B8C\u6210\u914D\u7F6E\u5373\u53EF\uFF0C\u771F\u6B63\u9700\u8981\u5F00\u53D1\u4EBA\u5458\u8FDB\u884C\u5904\u7406\u7684\u53EA\u6709 <strong>Handler\uFF08Controller\uFF09</strong> \u3001<strong>View</strong> \u3001<strong>Model</strong>\u3002</p><p>\u5F53\u7136\u6211\u4EEC\u73B0\u5728\u5927\u90E8\u5206\u7684\u5F00\u53D1\u90FD\u662F\u524D\u540E\u7AEF\u5206\u79BB\uFF0CRestful \u98CE\u683C\u63A5\u53E3\uFF0C\u540E\u7AEF\u53EA\u9700\u8981\u8FD4\u56DE Json \u6570\u636E\u5C31\u884C\u4E86\u3002</p><h3 id="_30-springmvc-restful-\u98CE\u683C\u7684\u63A5\u53E3\u7684\u6D41\u7A0B\u662F\u4EC0\u4E48\u6837\u7684\u5462" tabindex="-1"><a class="header-anchor" href="#_30-springmvc-restful-\u98CE\u683C\u7684\u63A5\u53E3\u7684\u6D41\u7A0B\u662F\u4EC0\u4E48\u6837\u7684\u5462" aria-hidden="true">#</a> 30.SpringMVC Restful \u98CE\u683C\u7684\u63A5\u53E3\u7684\u6D41\u7A0B\u662F\u4EC0\u4E48\u6837\u7684\u5462\uFF1F</h3><p>PS:\u8FD9\u662F\u4E00\u9053\u5168\u65B0\u7684\u516B\u80A1\uFF0C\u6BD5\u7ADF ModelAndView \u8FD9\u79CD\u65B9\u5F0F\u5E94\u8BE5\u6CA1\u4EBA\u7528\u4E86\u5427\uFF1F\u73B0\u5728\u90FD\u662F\u524D\u540E\u7AEF\u5206\u79BB\u63A5\u53E3\uFF0C\u516B\u80A1\u4E5F\u8BE5\u66F4\u65B0\u6362\u4EE3\u4E86\u3002</p><p>\u6211\u4EEC\u90FD\u77E5\u9053 Restful \u63A5\u53E3\uFF0C\u54CD\u5E94\u683C\u5F0F\u662F json\uFF0C\u8FD9\u5C31\u7528\u5230\u4E86\u4E00\u4E2A\u5E38\u7528\u6CE8\u89E3\uFF1A<strong>@ResponseBody</strong></p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>    <span class="token annotation punctuation">@GetMapping</span><span class="token punctuation">(</span><span class="token string">&quot;/user&quot;</span><span class="token punctuation">)</span>
    <span class="token annotation punctuation">@ResponseBody</span>
    <span class="token keyword">public</span> <span class="token class-name">User</span> <span class="token function">user</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
        <span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">User</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span><span class="token string">&quot;\u5F20\u4E09&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u52A0\u5165\u4E86\u8FD9\u4E2A\u6CE8\u89E3\u540E\uFF0C\u6574\u4F53\u7684\u6D41\u7A0B\u4E0A\u548C\u4F7F\u7528 ModelAndView \u5927\u4F53\u4E0A\u76F8\u540C\uFF0C\u4F46\u662F\u7EC6\u8282\u4E0A\u6709\u4E00\u4E9B\u4E0D\u540C\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-2da963a0-5da9-4b3a-aafd-fd8dbc7e1807.png" alt="Spring MVC Restful\u8BF7\u6C42\u54CD\u5E94\u793A\u610F\u56FE"></p><ol><li><p>\u5BA2\u6237\u7AEF\u5411\u670D\u52A1\u7AEF\u53D1\u9001\u4E00\u6B21\u8BF7\u6C42\uFF0C\u8FD9\u4E2A\u8BF7\u6C42\u4F1A\u5148\u5230\u524D\u7AEF\u63A7\u5236\u5668 DispatcherServlet</p></li><li><p>DispatcherServlet \u63A5\u6536\u5230\u8BF7\u6C42\u540E\u4F1A\u8C03\u7528 HandlerMapping \u5904\u7406\u5668\u6620\u5C04\u5668\u3002\u7531\u6B64\u5F97\u77E5\uFF0C\u8BE5\u8BF7\u6C42\u8BE5\u7531\u54EA\u4E2A Controller \u6765\u5904\u7406</p></li><li><p>DispatcherServlet \u8C03\u7528 HandlerAdapter \u5904\u7406\u5668\u9002\u914D\u5668\uFF0C\u544A\u8BC9\u5904\u7406\u5668\u9002\u914D\u5668\u5E94\u8BE5\u8981\u53BB\u6267\u884C\u54EA\u4E2A Controller</p></li><li><p>Controller \u88AB\u5C01\u88C5\u6210\u4E86 ServletInvocableHandlerMethod\uFF0CHandlerAdapter \u5904\u7406\u5668\u9002\u914D\u5668\u53BB\u6267\u884C invokeAndHandle \u65B9\u6CD5\uFF0C\u5B8C\u6210\u5BF9 Controller \u7684\u8BF7\u6C42\u5904\u7406</p></li><li><p>HandlerAdapter \u6267\u884C\u5B8C\u5BF9 Controller \u7684\u8BF7\u6C42\uFF0C\u4F1A\u8C03\u7528 HandlerMethodReturnValueHandler \u53BB\u5904\u7406\u8FD4\u56DE\u503C\uFF0C\u4E3B\u8981\u7684\u8FC7\u7A0B\uFF1A</p><p>5.1. \u8C03\u7528 RequestResponseBodyMethodProcessor\uFF0C\u521B\u5EFA ServletServerHttpResponse\uFF08Spring \u5BF9\u539F\u751F ServerHttpResponse \u7684\u5C01\u88C5\uFF09\u5B9E\u4F8B</p><p>5.2.\u4F7F\u7528 HttpMessageConverter \u7684 write \u65B9\u6CD5\uFF0C\u5C06\u8FD4\u56DE\u503C\u5199\u5165 ServletServerHttpResponse \u7684 OutputStream \u8F93\u51FA\u6D41\u4E2D</p><p>5.3.\u5728\u5199\u5165\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u4F1A\u4F7F\u7528 JsonGenerator\uFF08\u9ED8\u8BA4\u4F7F\u7528 Jackson \u6846\u67B6\uFF09\u5BF9\u8FD4\u56DE\u503C\u8FDB\u884C Json \u5E8F\u5217\u5316</p></li><li><p>\u6267\u884C\u5B8C\u8BF7\u6C42\u540E\uFF0C\u8FD4\u56DE\u7684 ModealAndView \u4E3A null\uFF0CServletServerHttpResponse \u91CC\u4E5F\u5DF2\u7ECF\u5199\u5165\u4E86\u54CD\u5E94\uFF0C\u6240\u4EE5\u4E0D\u7528\u5173\u5FC3 View \u7684\u5904\u7406</p></li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="spring-boot" tabindex="-1"><a class="header-anchor" href="#spring-boot" aria-hidden="true">#</a> Spring Boot</h2><h3 id="_31-\u4ECB\u7ECD\u4E00\u4E0B-springboot-\u6709\u54EA\u4E9B\u4F18\u70B9" tabindex="-1"><a class="header-anchor" href="#_31-\u4ECB\u7ECD\u4E00\u4E0B-springboot-\u6709\u54EA\u4E9B\u4F18\u70B9" aria-hidden="true">#</a> 31.\u4ECB\u7ECD\u4E00\u4E0B SpringBoot\uFF0C\u6709\u54EA\u4E9B\u4F18\u70B9\uFF1F</h3><p>Spring Boot \u57FA\u4E8E Spring \u5F00\u53D1\uFF0CSpirng Boot \u672C\u8EAB\u5E76\u4E0D\u63D0\u4F9B Spring \u6846\u67B6\u7684\u6838\u5FC3\u7279\u6027\u4EE5\u53CA\u6269\u5C55\u529F\u80FD\uFF0C\u53EA\u662F\u7528\u4E8E\u5FEB\u901F\u3001\u654F\u6377\u5730\u5F00\u53D1\u65B0\u4E00\u4EE3\u57FA\u4E8E Spring \u6846\u67B6\u7684\u5E94\u7528\u7A0B\u5E8F\u3002\u5B83\u5E76\u4E0D\u662F\u7528\u6765\u66FF\u4EE3 Spring \u7684\u89E3\u51B3\u65B9\u6848\uFF0C\u800C\u662F\u548C Spring \u6846\u67B6\u7D27\u5BC6\u7ED3\u5408\u7528\u4E8E\u63D0\u5347 Spring \u5F00\u53D1\u8005\u4F53\u9A8C\u7684\u5DE5\u5177\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-d9164ee6-5c86-4313-8fd9-efb9acfa5f0b.png" alt="SpringBoot\u56FE\u6807"></p><p>Spring Boot \u4EE5<code>\u7EA6\u5B9A\u5927\u4E8E\u914D\u7F6E</code>\u6838\u5FC3\u601D\u60F3\u5F00\u5C55\u5DE5\u4F5C\uFF0C\u76F8\u6BD4 Spring \u5177\u6709\u5982\u4E0B\u4F18\u52BF\uFF1A</p><ol><li>Spring Boot \u53EF\u4EE5\u5FEB\u901F\u521B\u5EFA\u72EC\u7ACB\u7684 Spring \u5E94\u7528\u7A0B\u5E8F\u3002</li><li>Spring Boot \u5185\u5D4C\u4E86\u5982 Tomcat\uFF0CJetty \u548C Undertow \u8FD9\u6837\u7684\u5BB9\u5668\uFF0C\u4E5F\u5C31\u662F\u8BF4\u53EF\u4EE5\u76F4\u63A5\u8DD1\u8D77\u6765\uFF0C\u7528\u4E0D\u7740\u518D\u505A\u90E8\u7F72\u5DE5\u4F5C\u4E86\u3002</li><li>Spring Boot \u65E0\u9700\u518D\u50CF Spring \u4E00\u6837\u4F7F\u7528\u4E00\u5806\u7E41\u7410\u7684 xml \u6587\u4EF6\u914D\u7F6E\u3002</li><li>Spring Boot \u53EF\u4EE5\u81EA\u52A8\u914D\u7F6E(\u6838\u5FC3)Spring\u3002SpringBoot \u5C06\u539F\u6709\u7684 XML \u914D\u7F6E\u6539\u4E3A Java \u914D\u7F6E\uFF0C\u5C06 bean \u6CE8\u5165\u6539\u4E3A\u4F7F\u7528\u6CE8\u89E3\u6CE8\u5165\u7684\u65B9\u5F0F(@Autowire)\uFF0C\u5E76\u5C06\u591A\u4E2A xml\u3001properties \u914D\u7F6E\u6D53\u7F29\u5728\u4E00\u4E2A appliaction.yml \u914D\u7F6E\u6587\u4EF6\u4E2D\u3002</li><li>Spring Boot \u63D0\u4F9B\u4E86\u4E00\u4E9B\u73B0\u6709\u7684\u529F\u80FD\uFF0C\u5982\u91CF\u5EA6\u5DE5\u5177\uFF0C\u8868\u5355\u6570\u636E\u9A8C\u8BC1\u4EE5\u53CA\u4E00\u4E9B\u5916\u90E8\u914D\u7F6E\u8FD9\u6837\u7684\u4E00\u4E9B\u7B2C\u4E09\u65B9\u529F\u80FD\u3002</li><li>Spring Boot \u53EF\u4EE5\u5FEB\u901F\u6574\u5408\u5E38\u7528\u4F9D\u8D56\uFF08\u5F00\u53D1\u5E93\uFF0C\u4F8B\u5982 spring-webmvc\u3001jackson-json\u3001validation-api \u548C tomcat \u7B49\uFF09\uFF0C\u63D0\u4F9B\u7684 POM \u53EF\u4EE5\u7B80\u5316 Maven \u7684\u914D\u7F6E\u3002\u5F53\u6211\u4EEC\u5F15\u5165\u6838\u5FC3\u4F9D\u8D56\u65F6\uFF0CSpringBoot \u4F1A\u81EA\u5F15\u5165\u5176\u4ED6\u4F9D\u8D56\u3002</li></ol><h3 id="_32-springboot-\u81EA\u52A8\u914D\u7F6E\u539F\u7406\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_32-springboot-\u81EA\u52A8\u914D\u7F6E\u539F\u7406\u4E86\u89E3\u5417" aria-hidden="true">#</a> 32.SpringBoot \u81EA\u52A8\u914D\u7F6E\u539F\u7406\u4E86\u89E3\u5417\uFF1F</h3><p>SpringBoot \u5F00\u542F\u81EA\u52A8\u914D\u7F6E\u7684\u6CE8\u89E3\u662F<code>@EnableAutoConfiguration</code> \uFF0C\u542F\u52A8\u7C7B\u4E0A\u7684\u6CE8\u89E3<code>@SpringBootApplication</code>\u662F\u4E00\u4E2A\u590D\u5408\u6CE8\u89E3\uFF0C\u5305\u542B\u4E86@EnableAutoConfiguration\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-df77ee15-2ff0-4ec7-8e65-e4ebb8ba88f1.png" alt="SpringBoot\u81EA\u52A8\u914D\u7F6E\u539F\u7406"></p><ul><li><p><code>EnableAutoConfiguration</code> \u53EA\u662F\u4E00\u4E2A\u7B80\u5355\u7684\u6CE8\u89E3\uFF0C\u81EA\u52A8\u88C5\u914D\u6838\u5FC3\u529F\u80FD\u7684\u5B9E\u73B0\u5B9E\u9645\u662F\u901A\u8FC7 <code>AutoConfigurationImportSelector</code>\u7C7B</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@AutoConfigurationPackage</span> <span class="token comment">//\u5C06main\u540C\u7EA7\u7684\u5305\u4E0B\u7684\u6240\u6709\u7EC4\u4EF6\u6CE8\u518C\u5230\u5BB9\u5668\u4E2D</span>
<span class="token annotation punctuation">@Import</span><span class="token punctuation">(</span><span class="token punctuation">{</span><span class="token class-name">AutoConfigurationImportSelector</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token comment">//\u52A0\u8F7D\u81EA\u52A8\u88C5\u914D\u7C7B xxxAutoconfiguration</span>
<span class="token keyword">public</span> <span class="token annotation punctuation">@interface</span> <span class="token class-name">EnableAutoConfiguration</span> <span class="token punctuation">{</span>
    <span class="token class-name">String</span> ENABLED_OVERRIDE_PROPERTY <span class="token operator">=</span> <span class="token string">&quot;spring.boot.enableautoconfiguration&quot;</span><span class="token punctuation">;</span>

    <span class="token class-name">Class</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">[</span><span class="token punctuation">]</span> <span class="token function">exclude</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">default</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span>

    <span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> <span class="token function">excludeName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">default</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p><code>AutoConfigurationImportSelector</code>\u5B9E\u73B0\u4E86<code>ImportSelector</code>\u63A5\u53E3\uFF0C\u8FD9\u4E2A\u63A5\u53E3\u7684\u4F5C\u7528\u5C31\u662F\u6536\u96C6\u9700\u8981\u5BFC\u5165\u7684\u914D\u7F6E\u7C7B\uFF0C\u914D\u5408<code>@Import(\uFF09</code>\u5C31\u53EF\u4EE5\u5C06\u76F8\u5E94\u7684\u7C7B\u5BFC\u5165\u5230 Spring \u5BB9\u5668\u4E2D</p></li><li><p>\u83B7\u53D6\u6CE8\u5165\u7C7B\u7684\u65B9\u6CD5\u662F selectImports()\uFF0C\u5B83\u5B9E\u9645\u8C03\u7528\u7684\u662F<code>getAutoConfigurationEntry</code>\uFF0C\u8FD9\u4E2A\u65B9\u6CD5\u662F\u83B7\u53D6\u81EA\u52A8\u88C5\u914D\u7C7B\u7684\u5173\u952E\uFF0C\u4E3B\u8981\u6D41\u7A0B\u53EF\u4EE5\u5206\u4E3A\u8FD9\u4E48\u51E0\u6B65\uFF1A</p><ol><li>\u83B7\u53D6\u6CE8\u89E3\u7684\u5C5E\u6027\uFF0C\u7528\u4E8E\u540E\u9762\u7684\u6392\u9664</li><li><strong>\u83B7\u53D6\u6240\u6709\u9700\u8981\u81EA\u52A8\u88C5\u914D\u7684\u914D\u7F6E\u7C7B\u7684\u8DEF\u5F84</strong>\uFF1A\u8FD9\u4E00\u6B65\u662F\u6700\u5173\u952E\u7684\uFF0C\u4ECE META-INF/spring.factories \u83B7\u53D6\u81EA\u52A8\u914D\u7F6E\u7C7B\u7684\u8DEF\u5F84</li><li>\u53BB\u6389\u91CD\u590D\u7684\u914D\u7F6E\u7C7B\u548C\u9700\u8981\u6392\u9664\u7684\u91CD\u590D\u7C7B\uFF0C\u628A\u9700\u8981\u81EA\u52A8\u52A0\u8F7D\u7684\u914D\u7F6E\u7C7B\u7684\u8DEF\u5F84\u5B58\u50A8\u8D77\u6765</li></ol></li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>    <span class="token keyword">protected</span> <span class="token class-name">AutoConfigurationImportSelector<span class="token punctuation">.</span>AutoConfigurationEntry</span> <span class="token function">getAutoConfigurationEntry</span><span class="token punctuation">(</span><span class="token class-name">AnnotationMetadata</span> annotationMetadata<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span><span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">isEnabled</span><span class="token punctuation">(</span>annotationMetadata<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">return</span> EMPTY_ENTRY<span class="token punctuation">;</span>
        <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
            <span class="token comment">//1.\u83B7\u53D6\u5230\u6CE8\u89E3\u7684\u5C5E\u6027</span>
            <span class="token class-name">AnnotationAttributes</span> attributes <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getAttributes</span><span class="token punctuation">(</span>annotationMetadata<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token comment">//2.\u83B7\u53D6\u9700\u8981\u81EA\u52A8\u88C5\u914D\u7684\u6240\u6709\u914D\u7F6E\u7C7B\uFF0C\u8BFB\u53D6META-INF/spring.factories\uFF0C\u83B7\u53D6\u81EA\u52A8\u914D\u7F6E\u7C7B\u8DEF\u5F84</span>
            <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> configurations <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getCandidateConfigurations</span><span class="token punctuation">(</span>annotationMetadata<span class="token punctuation">,</span> attributes<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token comment">//3.1.\u79FB\u9664\u91CD\u590D\u7684\u914D\u7F6E</span>
            configurations <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">removeDuplicates</span><span class="token punctuation">(</span>configurations<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token comment">//3.2.\u5904\u7406\u9700\u8981\u6392\u9664\u7684\u914D\u7F6E</span>
            <span class="token class-name">Set</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> exclusions <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getExclusions</span><span class="token punctuation">(</span>annotationMetadata<span class="token punctuation">,</span> attributes<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">checkExcludedClasses</span><span class="token punctuation">(</span>configurations<span class="token punctuation">,</span> exclusions<span class="token punctuation">)</span><span class="token punctuation">;</span>
            configurations<span class="token punctuation">.</span><span class="token function">removeAll</span><span class="token punctuation">(</span>exclusions<span class="token punctuation">)</span><span class="token punctuation">;</span>
            configurations <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getConfigurationClassFilter</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>configurations<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">fireAutoConfigurationImportEvents</span><span class="token punctuation">(</span>configurations<span class="token punctuation">,</span> exclusions<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">AutoConfigurationImportSelector<span class="token punctuation">.</span>AutoConfigurationEntry</span><span class="token punctuation">(</span>configurations<span class="token punctuation">,</span> exclusions<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_33-\u5982\u4F55\u81EA\u5B9A\u4E49\u4E00\u4E2A-springboot-srarter" tabindex="-1"><a class="header-anchor" href="#_33-\u5982\u4F55\u81EA\u5B9A\u4E49\u4E00\u4E2A-springboot-srarter" aria-hidden="true">#</a> 33.\u5982\u4F55\u81EA\u5B9A\u4E49\u4E00\u4E2A SpringBoot Srarter?</h3><p>\u77E5\u9053\u4E86\u81EA\u52A8\u914D\u7F6E\u539F\u7406\uFF0C\u521B\u5EFA\u4E00\u4E2A\u81EA\u5B9A\u4E49 SpringBoot Starter \u4E5F\u5F88\u7B80\u5355\u3002</p><ol><li>\u521B\u5EFA\u4E00\u4E2A\u9879\u76EE\uFF0C\u547D\u540D\u4E3A demo-spring-boot-starter\uFF0C\u5F15\u5165 SpringBoot \u76F8\u5173\u4F9D\u8D56</li></ol><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>        <span class="token generics"><span class="token punctuation">&lt;</span>dependency<span class="token punctuation">&gt;</span></span>
            <span class="token generics"><span class="token punctuation">&lt;</span>groupId<span class="token punctuation">&gt;</span></span>org<span class="token punctuation">.</span>springframework<span class="token punctuation">.</span>boot<span class="token operator">&lt;</span><span class="token operator">/</span>groupId<span class="token operator">&gt;</span>
            <span class="token generics"><span class="token punctuation">&lt;</span>artifactId<span class="token punctuation">&gt;</span></span>spring<span class="token operator">-</span>boot<span class="token operator">-</span>starter<span class="token operator">&lt;</span><span class="token operator">/</span>artifactId<span class="token operator">&gt;</span>
        <span class="token operator">&lt;</span><span class="token operator">/</span>dependency<span class="token operator">&gt;</span>
        <span class="token generics"><span class="token punctuation">&lt;</span>dependency<span class="token punctuation">&gt;</span></span>
            <span class="token generics"><span class="token punctuation">&lt;</span>groupId<span class="token punctuation">&gt;</span></span>org<span class="token punctuation">.</span>springframework<span class="token punctuation">.</span>boot<span class="token operator">&lt;</span><span class="token operator">/</span>groupId<span class="token operator">&gt;</span>
            <span class="token generics"><span class="token punctuation">&lt;</span>artifactId<span class="token punctuation">&gt;</span></span>spring<span class="token operator">-</span>boot<span class="token operator">-</span>configuration<span class="token operator">-</span>processor<span class="token operator">&lt;</span><span class="token operator">/</span>artifactId<span class="token operator">&gt;</span>
            <span class="token generics"><span class="token punctuation">&lt;</span>optional<span class="token punctuation">&gt;</span></span><span class="token boolean">true</span><span class="token operator">&lt;</span><span class="token operator">/</span>optional<span class="token operator">&gt;</span>
        <span class="token operator">&lt;</span><span class="token operator">/</span>dependency<span class="token operator">&gt;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ol start="2"><li><p>\u7F16\u5199\u914D\u7F6E\u6587\u4EF6</p><p>\u8FD9\u91CC\u5B9A\u4E49\u4E86\u5C5E\u6027\u914D\u7F6E\u7684\u524D\u7F00</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@ConfigurationProperties</span><span class="token punctuation">(</span>prefix <span class="token operator">=</span> <span class="token string">&quot;hello&quot;</span><span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloProperties</span> <span class="token punctuation">{</span>

    <span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>

    <span class="token comment">//\u7701\u7565getter\u3001setter</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u81EA\u52A8\u88C5\u914D</p><p>\u521B\u5EFA\u81EA\u52A8\u914D\u7F6E\u7C7B HelloPropertiesConfigure</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Configuration</span>
<span class="token annotation punctuation">@EnableConfigurationProperties</span><span class="token punctuation">(</span><span class="token class-name">HelloProperties</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloPropertiesConfigure</span> <span class="token punctuation">{</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u914D\u7F6E\u81EA\u52A8\u7C7B</p><p>\u5728<code>/resources/META-INF/spring.factories</code>\u6587\u4EF6\u4E2D\u6DFB\u52A0\u81EA\u52A8\u914D\u7F6E\u7C7B\u8DEF\u5F84</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name"><span class="token namespace">org<span class="token punctuation">.</span>springframework<span class="token punctuation">.</span>boot<span class="token punctuation">.</span>autoconfigure<span class="token punctuation">.</span></span>EnableAutoConfiguration</span><span class="token operator">=</span>\\
  <span class="token class-name"><span class="token namespace">cn<span class="token punctuation">.</span>fighter3<span class="token punctuation">.</span>demo<span class="token punctuation">.</span>starter<span class="token punctuation">.</span>configure<span class="token punctuation">.</span></span>HelloPropertiesConfigure</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u6D4B\u8BD5</p><ul><li><p>\u521B\u5EFA\u4E00\u4E2A\u5DE5\u7A0B\uFF0C\u5F15\u5165\u81EA\u5B9A\u4E49 starter \u4F9D\u8D56</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>        <span class="token generics"><span class="token punctuation">&lt;</span>dependency<span class="token punctuation">&gt;</span></span>
            <span class="token generics"><span class="token punctuation">&lt;</span>groupId<span class="token punctuation">&gt;</span></span>cn<span class="token punctuation">.</span>fighter3<span class="token operator">&lt;</span><span class="token operator">/</span>groupId<span class="token operator">&gt;</span>
            <span class="token generics"><span class="token punctuation">&lt;</span>artifactId<span class="token punctuation">&gt;</span></span>demo<span class="token operator">-</span>spring<span class="token operator">-</span>boot<span class="token operator">-</span>starter<span class="token operator">&lt;</span><span class="token operator">/</span>artifactId<span class="token operator">&gt;</span>
            <span class="token generics"><span class="token punctuation">&lt;</span>version<span class="token punctuation">&gt;</span></span><span class="token number">0.0</span><span class="token number">.1</span><span class="token operator">-</span>SNAPSHOT<span class="token operator">&lt;</span><span class="token operator">/</span>version<span class="token operator">&gt;</span>
        <span class="token operator">&lt;</span><span class="token operator">/</span>dependency<span class="token operator">&gt;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u5728\u914D\u7F6E\u6587\u4EF6\u91CC\u6DFB\u52A0\u914D\u7F6E</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>hello.name=\u5F20\u4E09
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div></li><li><p>\u6D4B\u8BD5\u7C7B</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@RunWith</span><span class="token punctuation">(</span><span class="token class-name">SpringRunner</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span>
<span class="token annotation punctuation">@SpringBootTest</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloTest</span> <span class="token punctuation">{</span>
    <span class="token annotation punctuation">@Autowired</span>
    <span class="token class-name">HelloProperties</span> helloProperties<span class="token punctuation">;</span>

    <span class="token annotation punctuation">@Test</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">hello</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;\u4F60\u597D\uFF0C&quot;</span><span class="token operator">+</span>helloProperties<span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li></ul></li></ol><ul><li>\u8FD0\u884C\u7ED3\u679C</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-3ff3cc21-6a56-434b-a89e-d2b55d558bd6.png" alt="\u8FD0\u884C\u7ED3\u679C"></p><p>\u81F3\u6B64\uFF0C\u968F\u624B\u5199\u7684\u4E00\u4E2A\u81EA\u5B9A\u4E49 SpringBoot-Starter \u5C31\u5B8C\u6210\u4E86\uFF0C\u867D\u7136\u6BD4\u8F83\u7B80\u5355\uFF0C\u4F46\u662F\u5B8C\u6210\u4E86\u4E3B\u8981\u7684\u81EA\u52A8\u88C5\u914D\u7684\u80FD\u529B\u3002</p><h3 id="_34-springboot-\u542F\u52A8\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#_34-springboot-\u542F\u52A8\u539F\u7406" aria-hidden="true">#</a> 34.Springboot \u542F\u52A8\u539F\u7406\uFF1F</h3><p>SpringApplication \u8FD9\u4E2A\u7C7B\u4E3B\u8981\u505A\u4E86\u4EE5\u4E0B\u56DB\u4EF6\u4E8B\u60C5\uFF1A</p><ol><li>\u63A8\u65AD\u5E94\u7528\u7684\u7C7B\u578B\u662F\u666E\u901A\u7684\u9879\u76EE\u8FD8\u662F Web \u9879\u76EE</li><li>\u67E5\u627E\u5E76\u52A0\u8F7D\u6240\u6709\u53EF\u7528\u521D\u59CB\u5316\u5668 \uFF0C \u8BBE\u7F6E\u5230 initializers \u5C5E\u6027\u4E2D</li><li>\u627E\u51FA\u6240\u6709\u7684\u5E94\u7528\u7A0B\u5E8F\u76D1\u542C\u5668\uFF0C\u8BBE\u7F6E\u5230 listeners \u5C5E\u6027\u4E2D</li><li>\u63A8\u65AD\u5E76\u8BBE\u7F6E main \u65B9\u6CD5\u7684\u5B9A\u4E49\u7C7B\uFF0C\u627E\u5230\u8FD0\u884C\u7684\u4E3B\u7C7B</li></ol><p>SpringBoot \u542F\u52A8\u5927\u81F4\u6D41\u7A0B\u5982\u4E0B \uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-68744556-a1ba-4e1f-a092-1582875f0da6.png" alt="SpringBoot \u542F\u52A8\u5927\u81F4\u6D41\u7A0B-\u56FE\u7247\u6765\u6E90\u7F51\u7EDC"></p><h2 id="spring-cloud" tabindex="-1"><a class="header-anchor" href="#spring-cloud" aria-hidden="true">#</a> Spring Cloud</h2><h3 id="_35-\u5BF9-springcloud-\u4E86\u89E3\u591A\u5C11" tabindex="-1"><a class="header-anchor" href="#_35-\u5BF9-springcloud-\u4E86\u89E3\u591A\u5C11" aria-hidden="true">#</a> 35.\u5BF9 SpringCloud \u4E86\u89E3\u591A\u5C11\uFF1F</h3><p>SpringCloud \u662F Spring \u5B98\u65B9\u63A8\u51FA\u7684\u5FAE\u670D\u52A1\u6CBB\u7406\u6846\u67B6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-92ab53d5-f303-4fc5-bd26-e62cefe374b3.png" alt="Spring Cloud Netfilx\u6838\u5FC3\u7EC4\u4EF6-\u6765\u6E90\u53C2\u8003[2]"></p><blockquote><p><strong>\u4EC0\u4E48\u662F\u5FAE\u670D\u52A1\uFF1F</strong></p></blockquote><ol><li>2014 \u5E74 <strong>Martin Fowler</strong> \u63D0\u51FA\u7684\u4E00\u79CD\u65B0\u7684\u67B6\u6784\u5F62\u5F0F\u3002\u5FAE\u670D\u52A1\u67B6\u6784\u662F\u4E00\u79CD<strong>\u67B6\u6784\u6A21\u5F0F</strong>\uFF0C\u63D0\u5021\u5C06\u5355\u4E00\u5E94\u7528\u7A0B\u5E8F\u5212\u5206\u6210\u4E00\u7EC4\u5C0F\u7684\u670D\u52A1\uFF0C\u670D\u52A1\u4E4B\u95F4\u76F8\u4E92\u534F\u8C03\uFF0C\u4E92\u76F8\u914D\u5408\uFF0C\u4E3A\u7528\u6237\u63D0\u4F9B\u6700\u7EC8\u4EF7\u503C\u3002\u6BCF\u4E2A\u670D\u52A1\u8FD0\u884C\u5728\u5176\u72EC\u7ACB\u7684\u8FDB\u7A0B\u4E2D\uFF0C\u670D\u52A1\u4E0E\u670D\u52A1\u4E4B\u95F4\u91C7\u7528\u8F7B\u91CF\u7EA7\u7684\u901A\u4FE1\u673A\u5236(\u5982 HTTP \u6216 Dubbo)\u4E92\u76F8\u534F\u4F5C\uFF0C\u6BCF\u4E2A\u670D\u52A1\u90FD\u56F4\u7ED5\u7740\u5177\u4F53\u7684\u4E1A\u52A1\u8FDB\u884C\u6784\u5EFA\uFF0C\u5E76\u4E14\u80FD\u591F\u88AB\u72EC\u7ACB\u7684\u90E8\u7F72\u5230\u751F\u4EA7\u73AF\u5883\u4E2D\uFF0C\u53E6\u5916\uFF0C\u5E94\u5C3D\u91CF\u907F\u514D\u7EDF\u4E00\u7684\uFF0C\u96C6\u4E2D\u5F0F\u7684\u670D\u52A1\u7BA1\u7406\u673A\u5236\uFF0C\u5BF9\u5177\u4F53\u7684\u4E00\u4E2A\u670D\u52A1\u800C\u8A00\uFF0C\u5E94\u6839\u636E\u4E1A\u52A1\u4E0A\u4E0B\u6587\uFF0C\u9009\u62E9\u5408\u9002\u7684\u8BED\u8A00\u3001\u5DE5\u5177(\u5982 Maven)\u5BF9\u5176\u8FDB\u884C\u6784\u5EFA\u3002</li><li>\u5FAE\u670D\u52A1\u5316\u7684\u6838\u5FC3\u5C31\u662F\u5C06\u4F20\u7EDF\u7684\u4E00\u7AD9\u5F0F\u5E94\u7528\uFF0C\u6839\u636E\u4E1A\u52A1\u62C6\u5206\u6210\u4E00\u4E2A\u4E00\u4E2A\u7684\u670D\u52A1\uFF0C\u5F7B\u5E95\u5730\u53BB\u8026\u5408\uFF0C\u6BCF\u4E00\u4E2A\u5FAE\u670D\u52A1\u63D0\u4F9B\u5355\u4E2A\u4E1A\u52A1\u529F\u80FD\u7684\u670D\u52A1\uFF0C\u4E00\u4E2A\u670D\u52A1\u505A\u4E00\u4EF6\u4E8B\u60C5\uFF0C\u4ECE\u6280\u672F\u89D2\u5EA6\u770B\u5C31\u662F\u4E00\u79CD\u5C0F\u800C\u72EC\u7ACB\u7684\u5904\u7406\u8FC7\u7A0B\uFF0C\u7C7B\u4F3C\u8FDB\u7A0B\u7684\u6982\u5FF5\uFF0C\u80FD\u591F\u81EA\u884C\u5355\u72EC\u542F\u52A8\u6216\u9500\u6BC1\uFF0C\u62E5\u6709\u81EA\u5DF1\u72EC\u7ACB\u7684\u6570\u636E\u5E93\u3002</li></ol><blockquote><p><strong>\u5FAE\u670D\u52A1\u67B6\u6784\u4E3B\u8981\u8981\u89E3\u51B3\u54EA\u4E9B\u95EE\u9898\uFF1F</strong></p></blockquote><ol><li>\u670D\u52A1\u5F88\u591A\uFF0C\u5BA2\u6237\u7AEF\u600E\u4E48\u8BBF\u95EE\uFF0C\u5982\u4F55\u63D0\u4F9B\u5BF9\u5916\u7F51\u5173?</li><li>\u8FD9\u4E48\u591A\u670D\u52A1\uFF0C\u670D\u52A1\u4E4B\u95F4\u5982\u4F55\u901A\u4FE1? HTTP \u8FD8\u662F RPC?</li><li>\u8FD9\u4E48\u591A\u670D\u52A1\uFF0C\u5982\u4F55\u6CBB\u7406? \u670D\u52A1\u7684\u6CE8\u518C\u548C\u53D1\u73B0\u3002</li><li>\u670D\u52A1\u6302\u4E86\u600E\u4E48\u529E\uFF1F\u7194\u65AD\u673A\u5236\u3002</li></ol><blockquote><p><strong>\u6709\u54EA\u4E9B\u4E3B\u6D41\u5FAE\u670D\u52A1\u6846\u67B6\uFF1F</strong></p></blockquote><ol><li>Spring Cloud Netflix</li><li>Spring Cloud Alibaba</li><li>SpringBoot + Dubbo + ZooKeeper</li></ol><blockquote><p><strong>SpringCloud \u6709\u54EA\u4E9B\u6838\u5FC3\u7EC4\u4EF6\uFF1F</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-2b988a72-0739-4fed-b271-eaf12589444f.png" alt="SpringCloud"></p><p>PS:\u5FAE\u670D\u52A1\u540E\u9762\u6709\u673A\u4F1A\u518D\u6269\u5C55\uFF0C\u5176\u5B9E\u9762\u8BD5\u4E00\u822C\u90FD\u662F\u7ED3\u5408\u9879\u76EE\u53BB\u95EE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>`,121),x=n("\u56FE\u6587\u8BE6\u89E3 35 \u9053Spring\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),C={href:"https://mp.weixin.qq.com/s/EQge6DmgIqYITM3mAxkatg",target:"_blank",rel:"noopener noreferrer"},I=n("\u8F6C\u8F7D\u94FE\u63A5"),D=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),_={href:"https://mp.weixin.qq.com/s/Y17S85ntHm_MLTZMJdtjQQ",target:"_blank",rel:"noopener noreferrer"},O=n("\u539F\u6587\u94FE\u63A5"),M=n("\u3002");function T(F,R){const a=o("ExternalLinkIcon");return c(),i("div",null,[r,s("blockquote",null,[s("p",null,[u,s("a",d,[k,t(a)]),v,s("a",m,[b,t(a)]),g])]),f,s("p",null,[y,s("a",h,[w,t(a)])]),S,s("p",null,[j,s("a",B,[A,t(a)]),q]),P,s("blockquote",null,[s("p",null,[x,s("a",C,[I,t(a)]),D,s("a",_,[O,t(a)]),M])])])}var H=p(l,[["render",T],["__file","spring.html.vue"]]);export{H as default};