Go supports time formatting and parsing via
pattern-based layouts.
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package main
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import (
"fmt"
"time"
)
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func main() {
p := fmt.Println
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Here’s a basic example of formatting a time
according to RFC3339, using the corresponding layout
constant.
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t := time.Now()
p(t.Format(time.RFC3339))
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Time parsing uses the same layout values as Format .
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t1, e := time.Parse(
time.RFC3339,
"2012-11-01T22:08:41+00:00")
p(t1)
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Format and Parse use example-based layouts. Usually
you’ll use a constant from time for these layouts, but
you can also supply custom layouts. Layouts must use the
reference time Mon Jan 2 15:04:05 MST 2006 to show the
pattern with which to format/parse a given time/string.
The example time must be exactly as shown: the year 2006,
15 for the hour, Monday for the day of the week, etc.
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p(t.Format("3:04PM"))
p(t.Format("Mon Jan _2 15:04:05 2006"))
p(t.Format("2006-01-02T15:04:05.999999-07:00"))
form := "3 04 PM"
t2, e := time.Parse(form, "8 41 PM")
p(t2)
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For purely numeric representations you can also
use standard string formatting with the extracted
components of the time value.
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fmt.Printf("%d-%02d-%02dT%02d:%02d:%02d-00:00\n",
t.Year(), t.Month(), t.Day(),
t.Hour(), t.Minute(), t.Second())
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Parse will return an error on malformed input
explaining the parsing problem.
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ansic := "Mon Jan _2 15:04:05 2006"
_, e = time.Parse(ansic, "8:41PM")
p(e)
}
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