如何在Go中将时间偏移量转换为位置/时区 [英] How do you convert a time offset to a location/timezone in Go

问题描述

给出一个任意的时间偏移量，如何创建一个代表该时间偏移量的可用time.Location对象?

以下代码使用偏移量解析时间，但是fmt.Println(t.Location())随后返回no信息:

func main() {
    offset := "+1100"

    t, err := time.Parse("15:04 GMT-0700","15:06 GMT"+offset)
    if err != nil {
        fmt.Println("fail", err)
    }
    fmt.Println(t)
    fmt.Println(t.UTC())
    fmt.Println(t.Location())
}

游乐场: https://play.golang.org/p/j_E28qJ8Vgy

基本上我有一些带有时间偏移量的时间数据，但是没有位置数据，我想创建一个time.Location对象以确保记录GMT偏移量.然后能够输出相对于最终用户实际位置的时间偏移量.

解决方案

使用:

loc := time.FixedZone("UTC+11", +11*60*60)

然后设置到该位置:

t = t.In(loc)

尝试此:

package main

import (
    "fmt"
    "time"
)

func main() {
    loc := time.FixedZone("UTC+11", +11*60*60)

    t := time.Now()
    fmt.Println(t)
    fmt.Println(t.Location())

    t = t.In(loc)
    fmt.Println(t)
    fmt.Println(t.Location())

    fmt.Println(t.UTC())
    fmt.Println(t.Location())
}

输出:

2009-11-10 23:00:00 +0000 UTC m=+0.000000001
UTC
2009-11-11 10:00:00 +1100 UTC+11
UTC+11
2009-11-10 23:00:00 +0000 UTC
UTC+11

Given an arbitrary time offset, how does one go about creating a usable time.Location object that represents that time offset?

The following code parses a time using an offset, but fmt.Println(t.Location()) subsequently returns no information:

func main() {
    offset := "+1100"

    t, err := time.Parse("15:04 GMT-0700","15:06 GMT"+offset)
    if err != nil {
        fmt.Println("fail", err)
    }
    fmt.Println(t)
    fmt.Println(t.UTC())
    fmt.Println(t.Location())
}

Playground: https://play.golang.org/p/j_E28qJ8Vgy

Basically I have some time data with time offsets, but without location data, I want to create a time.Location object to ensure the GMT offset is recorded. And then be able to output the time relative to the end users actual location time offset.

解决方案

Use:

loc := time.FixedZone("UTC+11", +11*60*60)

Then set to this location:

t = t.In(loc)

Try this:

package main

import (
    "fmt"
    "time"
)

func main() {
    loc := time.FixedZone("UTC+11", +11*60*60)

    t := time.Now()
    fmt.Println(t)
    fmt.Println(t.Location())

    t = t.In(loc)
    fmt.Println(t)
    fmt.Println(t.Location())

    fmt.Println(t.UTC())
    fmt.Println(t.Location())
}

Output:

2009-11-10 23:00:00 +0000 UTC m=+0.000000001
UTC
2009-11-11 10:00:00 +1100 UTC+11
UTC+11
2009-11-10 23:00:00 +0000 UTC
UTC+11

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