Go 时间格式化与解析

Table of Contents

跟其他语言的设计不同(Python 等),Go 时间的格式化与解析都是通过 layout 参数来实现的。类似: Mon Jan 2 15:04:05 MST 2006

01/02 03:04:05PM '06 -0700 可以帮助记忆,某个字段使用某个值,是一种 约定 。两个函数:

1 所有的时间和日期选项

(用来书写 layout

Type	 => Option
--------------------------------------------------------------------
Year     => 06   2006
Month    => 01   1   Jan   January
Day	     => 02   2   _2   (width two, right justified)
Weekday	 => Mon   Monday
Hours    => 03   3   15
Minutes  => 04   4
Seconds  => 05   5
ms μs ns => .000   .000000   .000000000
ms μs ns => .999   .999999   .999999999   (trailing zeros removed)
am/pm    => PM   pm
Timezone => MST
Offset   => -0700   -07   -07:00   Z0700   Z07:00

2 常用的时间和日期格式

Layout	                   => Note
------------------------------------------------------
January 2 2006	           => Date
01/02/06
Jan-02-06
------------------------------------------------------
15:04:05	               => Time
3:04:05 PM
------------------------------------------------------
Jan _2 15:04:05	           => Timestamp
Jan _2 15:04:05.000000	      with microseconds
------------------------------------------------------
2006-01-02T15:04:05-0700   => ISO 8601
2006-01-02
15:04:05
------------------------------------------------------
02 Jan 06 15:04 MST	       => RFC 822
02 Jan 06 15:04 -0700	      with numeric zone
------------------------------------------------------
Mon, 02 Jan 2006 15:04:05 MST	=> RFC 1123
Mon, 02 Jan 2006 15:04:05 -0700	   with numeric zone
------------------------------------------------------

(这里可以理解成为大家的约定)

3 预定义的日期和时间戳 layouts

预定义的格式常量,可以直接拿来用( time 库中)。

ANSIC       = "Mon Jan _2 15:04:05 2006"
UnixDate    = "Mon Jan _2 15:04:05 MST 2006"
RubyDate    = "Mon Jan 02 15:04:05 -0700 2006"
RFC822      = "02 Jan 06 15:04 MST"
RFC822Z     = "02 Jan 06 15:04 -0700"
RFC850      = "Monday, 02-Jan-06 15:04:05 MST"
RFC1123     = "Mon, 02 Jan 2006 15:04:05 MST"
RFC1123Z    = "Mon, 02 Jan 2006 15:04:05 -0700"
RFC3339     = "2006-01-02T15:04:05Z07:00"
RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00"
Kitchen     = "3:04PM"
// Handy time stamps.
Stamp      = "Jan _2 15:04:05"
StampMilli = "Jan _2 15:04:05.000"
StampMicro = "Jan _2 15:04:05.000000"
StampNano  = "Jan _2 15:04:05.000000000"

总体来看,Go 的这种做法,反倒比 Python,JavaScript 等统一一些。

Date: 2019-01-18 11:07

Author: JerryZhang