duanming7961 2019-02-06 11:05
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如何在Go中构造time.Time与时区偏移

This is an example date from an Apache log:

[07/Mar/2004:16:47:46 -0800]

I have successfully parsed this into year(int), month(time.Month), day(int), hour(int), minute(int), second(int), and timezone(string).

How can I construct time.Time such that it includes the -0800 time zone offset?

This is what I have so far:

var nativeDate time.Time
nativeDate = time.Date(year, time.Month(month), day, hour, minute, second, 0, ????)

What should I use in place of ????? time.Local or time.UTC is not appropriate here.

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  • dqppv86022 2019-02-06 11:08
    关注

    You may use time.FixedZone() to construct a time.Location with a fixed offset.

    Example:

    loc := time.FixedZone("myzone", -8*3600)
    nativeDate := time.Date(2019, 2, 6, 0, 0, 0, 0, loc)
    fmt.Println(nativeDate)
    

    Output (try it on the Go Playground):

    2019-02-06 00:00:00 -0800 myzone
    

    If you have the zone offset as a string, you may use time.Parse() to parse it. Use a layout string that only contains the reference zone offset:

    t, err := time.Parse("-0700", "-0800")
    fmt.Println(t, err)
    

    This outputs (try it on the Go Playground):

    0000-01-01 00:00:00 -0800 -0800 <nil>
    

    As you can see, the result time.Time has a zone offset of -0800 hours.

    So our original example can also be written as:

    t, err := time.Parse("-0700", "-0800")
    if err != nil {
        panic(err)
    }
    
    nativeDate := time.Date(2019, 2, 6, 0, 0, 0, 0, t.Location())
    fmt.Println(nativeDate)
    

    Output (try it on the Go Playground):

    2019-02-06 00:00:00 -0800 -0800
    
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