From a8893615c5a70726d21244ac36cda7cd09b82253 Mon Sep 17 00:00:00 2001
From: pengshiyu <1940607002@qq.com>
Date: Sun, 9 Oct 2022 22:56:46 +0800
Subject: [PATCH] fix

---
 blog/golang/golang-standard-time.md | 232 ++++++++++++++++++++++++++++
 blog/golang/index.md                |   3 +-
 2 files changed, 234 insertions(+), 1 deletion(-)
 create mode 100644 blog/golang/golang-standard-time.md

diff --git a/blog/golang/golang-standard-time.md b/blog/golang/golang-standard-time.md
new file mode 100644
index 0000000..e137567
--- /dev/null
+++ b/blog/golang/golang-standard-time.md
@@ -0,0 +1,232 @@
+# Golang标准库-time
+
+time包提供测量和显示时间
+
+## 获取时间
+
+示例
+
+```go
+package main
+
+import (
+    "fmt"
+    "time"
+)
+
+func main() {
+    // 获取当前时间
+    now := time.Now()
+    fmt.Printf("now: %v\n", now)
+    // now: 2022-10-09 22:26:46.28154 +0800 CST m=+0.000130816
+
+    // 年 月 日 时 分 秒
+    year := now.Year()
+    month := now.Month()
+    day := now.Day()
+    hour := now.Hour()
+    minute := now.Minute()
+    second := now.Second()
+
+    fmt.Printf("%d-%02d-%02d %02d:%02d:%02d\n", year, month, day, hour, minute, second)
+    // 2022-10-09 22:28:48
+
+    fmt.Printf("%T, %T, %T, %T, %T, %T, %T\n", now, year, month, day, hour, minute, second)
+    // time.Time, int, time.Month, int, int, int, int
+
+}
+
+```
+
+## 时间戳
+
+1970年1月1日 至当前时间的总毫秒数
+
+```go
+package main
+
+import (
+    "fmt"
+    "time"
+)
+
+func main() {
+    // 获取当前时间
+    now := time.Now()
+
+    // 毫秒时间戳
+    fmt.Printf("now: %T %v\n", now.Unix(), now.Unix())
+    // now: int64 1665325944
+
+    // 纳秒时间戳
+    fmt.Printf("now: %T %v\n", now.UnixNano(), now.UnixNano())
+    // now: int64 1665326004937102000
+}
+
+```
+
+## 时间格式和时间戳转换
+
+```go
+package main
+
+import (
+    "fmt"
+    "time"
+)
+
+func main() {
+    // 获取当前时间
+    now := time.Now()
+
+    // 时间格式获取时间戳
+    timestamp := now.Unix()
+    fmt.Printf("timestamp: %v\n", timestamp)
+    // timestamp: 1665326148
+
+    // 时间戳转为时间格式
+    t := time.Unix(timestamp, 0)
+    fmt.Printf("t: %v\n", t)
+    // t: 2022-10-09 22:35:48 +0800 CST
+}
+
+```
+
+## 操作时间
+
+常量枚举
+
+```go
+const (
+    Nanosecond  Duration = 1
+    Microsecond          = 1000 * Nanosecond
+    Millisecond          = 1000 * Microsecond
+    Second               = 1000 * Millisecond
+    Minute               = 60 * Second
+    Hour                 = 60 * Minute
+)
+```
+
+示例
+
+```go
+package main
+
+import (
+    "fmt"
+    "time"
+)
+
+func main() {
+    // 获取当前时间
+    now := time.Now()
+    fmt.Printf("now: %v\n", now)
+    // now: 2022-10-09 22:38:21.99582 +0800 CST m=+0.000247516
+
+    // 增加 3 分钟
+    t := now.Add(time.Minute * 3)
+    fmt.Printf("t: %v\n", t)
+    // t: 2022-10-09 22:41:21.99582 +0800 CST m=+180.000247516
+
+    // 时间差
+    diff := t.Sub(now)
+    fmt.Printf("diff: %v\n", diff)
+    // diff: 3m0s
+
+    // 时间比较 相等
+    ret1 := t.Equal(now)
+    fmt.Printf("ret1: %v\n", ret1)
+    // ret1: false
+
+    // 时间比较 之前
+    ret2 := t.Before(now)
+    fmt.Printf("ret2: %v\n", ret2)
+    // ret2: false
+
+    // 时间比较 之后
+    ret3 := t.After(now)
+    fmt.Printf("ret3: %v\n", ret3)
+    // ret3: true
+}
+
+```
+
+## 定时器
+
+```go
+package main
+
+import (
+    "fmt"
+    "time"
+)
+
+func main() {
+    // 每隔两秒执行一次
+    ticker := time.Tick(time.Second * 2)
+    for i := range ticker {
+        fmt.Printf("i: %v\n", i)
+    }
+
+    // i: 2022-10-09 22:45:37.026807 +0800 CST m=+2.000242470
+    // i: 2022-10-09 22:45:39.030351 +0800 CST m=+4.003789519
+    // i: 2022-10-09 22:45:41.03117 +0800 CST m=+6.004610715
+
+}
+
+```
+
+## 时间格式化
+
+golang诞生时间： 2006年1月2日 15点04分，记忆口诀：2006 12345
+
+```go
+package main
+
+import (
+    "fmt"
+    "time"
+)
+
+func main() {
+    now := time.Now()
+    fmt.Printf("now.Format(): %v\n", now.Format("2006-01-02 15:04:05"))
+    // now.Format(): 2022-10-09 22:49:20
+}
+
+```
+
+## 解析字符串格式的时间
+
+```go
+package main
+
+import (
+    "fmt"
+    "time"
+)
+
+func main() {
+    now := time.Now()
+    fmt.Printf("now: %v\n", now)
+    // now: 2022-10-09 22:54:22.004375 +0800 CST m=+0.000089638
+
+    // 加载时区
+    loc, err := time.LoadLocation("Asia/Shanghai")
+    if err != nil {
+        fmt.Printf("err: %v\n", err)
+        return
+    }
+
+    // 按照指定时区指定格式解析字符串格式的时间
+    t, err2 := time.ParseInLocation("2006-01-02 15:04:05", "2022-10-09 22:49:20", loc)
+    if err2 != nil {
+        fmt.Printf("err2: %v\n", err2)
+        return
+    }
+
+    fmt.Printf("t: %v\n", t)
+    // t: 2022-10-09 22:49:20 +0800 CST
+}
+
+```
diff --git a/blog/golang/index.md b/blog/golang/index.md
index 90f2d6e..7d61570 100644
--- a/blog/golang/index.md
+++ b/blog/golang/index.md
@@ -69,9 +69,10 @@
 - [Golang标准库-bytes](/blog/golang/golang-standard-bytes.md)
 - [Golang标准库-errors](/blog/golang/golang-standard-errors.md)
 - [Golang标准库-sort](/blog/golang/golang-standard-sort.md)
+- [Golang标准库-time](/blog/golang/golang-standard-time.md)
 
 https://www.bilibili.com/video/BV1ME411Y71o?p=27&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
 
 
 
-https://www.bilibili.com/video/BV1zR4y1t7Wj/?p=95&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
\ No newline at end of file
+https://www.bilibili.com/video/BV1zR4y1t7Wj/?p=96&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
\ No newline at end of file
-- 
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