golang时间字符串和时间戳转换

1. 获取当前时间字符串和时间戳

package main

import (
"fmt"
"time"
)

func main() {
now := time.Now().UTC()
// 显示时间格式： UnixDate = "Mon Jan _2 15:04:05 MST 2006"
fmt.Printf("%s\n", now.Format(time.UnixDate))
// 显示时间戳
fmt.Printf("%ld\n", now.Unix())
// 显示时分:Kitchen = "3:04PM"
fmt.Printf("%s\n", now.Format("3:04PM"))
}

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"
)

2. 时间字符串解析成时间格式

package main

import (
"fmt"
"time"
)

func main() {
timeStr := "2018-01-01"
fmt.Println("timeStr:", timeStr)
t, _ := time.Parse("2006-01-02", timeStr)
fmt.Println(t.Format(time.UnixDate))
}

3. 获取当天零点时间戳

package main

import (
"fmt"
"time"
)

func main() {
timeStr := time.Now().Format("2006-01-02")
t, _ := time.Parse("2006-01-02", timeStr)
fmt.Println(t.Format(time.UnixDate))
//Unix返回早八点的时间戳，减去8个小时
timestamp := t.UTC().Unix() - 8*3600
fmt.Println("timestamp:", timestamp)
}

package main

import (
"fmt"
"time"
)

func main() {
now := time.Now()
t, _ := time.ParseInLocation("2006-01-02", now.Format("2006-01-02"), time.Local)
timestamp := t.Unix()
fmt.Println(timestamp)
}
/*
time.Local本地时区
var Local *Location = &localLoc
以及UTC时区
var UTC *Location = &utcLoc
还可以替换成指定时区
//func LoadLocation(name string) (*Location, error)
loc, _ := time.LoadLocation("Europe/Berlin")
If the name is "" or "UTC", LoadLocation returns UTC. If the name is "Local", LoadLocation returns Local.
*/

参考