减去时间.Go中时间的持续时间 [英] Subtracting time.Duration from time in Go

问题描述

我有一个从 time.Now()获得的 time.Time 值，我想获取另一个正好是1个月前的时间.

I have a time.Time value obtained from time.Now() and I want to get another time which is exactly 1 month ago.

我知道可以通过 time.Sub()(需要另一个 time.Time )进行减法，但这将导致 time.Duration ，而我反过来需要它.

I know subtracting is possible with time.Sub() (which wants another time.Time), but that will result in a time.Duration and I need it the other way around.

推荐答案

尝试添加日期:

package main

import (
    "fmt"
    "time"
)

func main() {
    now := time.Now()

    fmt.Println("now:", now)

    then := now.AddDate(0, -1, 0)

    fmt.Println("then:", then)
}

产生:

now: 2009-11-10 23:00:00 +0000 UTC
then: 2009-10-10 23:00:00 +0000 UTC

游乐场: http://play.golang.org/p/QChq02kisT

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