Go时间格式化/解析实例

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Go支持通过基于模式的布局进行时间格式化和解析。这里是根据RFC3339格式化时间的一个基本示例,使用相应的布…

Go支持通过基于模式的布局进行时间格式化和解析。这里是根据RFC3339格式化时间的一个基本示例,使用相应的布局常量。

时间解析使用Format相同的布局值。

具体的 epoch 用法,可参考示例中的代码 –

所有的示例代码,都放在 F:workspgolang 目录下。安装Go编程环境请参考:

json.go的完整代码如下所示 –

package main    import "fmt"  import "time"    func main() {      p := fmt.Println        // Here's a basic example of formatting a time      // according to RFC3339, using the corresponding layout      // constant.      t := time.Now()      p(t.Format(time.RFC3339))        // Time parsing uses the same layout values as `Format`.      t1, e := time.Parse(          time.RFC3339,          "2012-11-01T22:08:41+00:00")      p(t1)        // `Format` and `Parse` use example-based layouts. Usually      // you'll use a constant from `time` for these layouts, but      // you can also supply custom layouts. Layouts must use the      // reference time `Mon Jan 2 15:04:05 MST 2006` to show the      // pattern with which to format/parse a given time/string.      // The example time must be exactly as shown: the year 2006,      // 15 for the hour, Monday for the day of the week, etc.      p(t.Format("3:04PM"))      p(t.Format("Mon Jan _2 15:04:05 2006"))      p(t.Format("2006-01-02T15:04:05.999999-07:00"))      form := "3 04 PM"      t2, e := time.Parse(form, "8 41 PM")      p(t2)        // For purely numeric representations you can also      // use standard string formatting with the extracted      // components of the time value.      fmt.Printf("%d-%02d-%02dT%02d:%02d:%02d-00:00n",          t.Year(), t.Month(), t.Day(),          t.Hour(), t.Minute(), t.Second())        // `Parse` will return an error on malformed input      // explaining the parsing problem.      ansic := "Mon Jan _2 15:04:05 2006"      _, e = time.Parse(ansic, "8:41PM")      p(e)  }  

执行上面代码,将得到以下输出结果 –

F:workspgolang>go run time-formatting-parsing.go  2017-01-21T09:22:42+08:00  2012-11-01 22:08:41 +0000 +0000  9:22AM  Sat Jan 21 09:22:42 2017  2017-01-21T09:22:42.809652+08:00  0000-01-01 20:41:00 +0000 UTC  2017-01-21T09:22:42-00:00  parsing time "8:41PM" as "Mon Jan _2 15:04:05 2006": cannot parse "8:41PM" as "Mon"  

贺, 贺朝

关于作者: 贺朝

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