首发于:http://blog.shajiquan.com/2015/12/golang-time-format/
今天有人在群里问:
问一个时间格式化问题:
fmt.Println(time.Now().Format("2006year 01month 02day"))
2015year 12month 18day
fmt.Println(time.Now().Format("2015year 01month 01day"))
181253year 12month 12day
为什么?
困扰好久
首先,这是一个很奇葩的问题。
其次,我,以及比我对 Golang 更了解的朋友,都掉过这个坑。我们曾在这个问题上,花了很多时间,最后发现是 Golang 自己的奇怪设定导致。尤其是,一段时间不用 time 包后,过段时间居然又忘了。
然后,怪我们没看文档,可是…
结论:年、月、日、时、分、秒,英文、数字,必须精确地限定到 golang 指定的时间原点:2006-01-02 15:04:05
示例:
package main
import (
"fmt"
"time"
)
func main() {
fmt.Println("hello ")
now := time.Now()
nowRight := now.Format("2006-01-02 15:04")
fmt.Println(nowRight)
nowWrong := now.Format("2006-01-03日错了 15:05 分错了")
fmt.Println(nowWrong)
fmt.Println(now.Format("Mon Jan _2 15:04:05 2006 年"))
fmt.Println("变态吧!")
}
附,格式化字符串模板:
const (
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" // RFC822 with numeric zone
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" // RFC1123 with numeric zone
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"
)