go - 如何将以毫秒为单位的字符串时间(hh :mm:ss. xxx)转换为time.Time？

Question

基本上我有这样的时间作为一个字符串:

15:56:36.113

我想把它转换成time.Time。

根据我正在阅读的内容，在使用 time.Parse() 时我不能使用毫秒。

还有其他方法可以将我的字符串转换为 time.Time 吗？

Answer 1

Package time

Format Reference Time

A decimal point followed by one or more zeros represents a fractional second, printed to the given number of decimal places. A decimal point followed by one or more nines represents a fractional second, printed to the given number of decimal places, with trailing zeros removed. When parsing (only), the input may contain a fractional second field immediately after the seconds field, even if the layout does not signify its presence. In that case a decimal point followed by a maximal series of digits is parsed as a fractional second.

例如，

package main

import (
    "fmt"
    "time"
)

func main() {
    t, err := time.Parse("15:04:05", "15:56:36.113")
    if err != nil {
        fmt.Println(err)
    }
    fmt.Println(t)

    fmt.Println(t.Format("15:04:05.000"))

    h, m, s := t.Clock()
    ms := t.Nanosecond() / int(time.Millisecond)
    fmt.Printf("%02d:%02d:%02d.%03d\n", h, m, s, ms)
}

输出:

0000-01-01 15:56:36.113 +0000 UTC
15:56:36.113
15:56:36.113

注意:Time 类型的零值为 0000-01-01 00:00:00.000000000 UTC。