golang中日期操作之日期格式化及日期转换

timeNow := time.Now()
fmt.Println("yyyy-MM-dd HH:mm:ss" ,timeNow.Format("2006-01-02 15:04:05"))
// 打印： yyyy-MM-dd HH:mm:ss: 2022-05-11 14:24:19

fmt.Println("from 1970-01-01 to now seconds: ",int32(time.Now().Unix()))

year,month,day := timeNow.Date()
fmt.Println(year,month,day)
// 注意打印的是： 2022 May 11

timeLast := timeNow.AddDate(0,0,-1)
fmt.Println(timeLast.Format("2006-01-02 15:04:05"))

time2 := timeNow.Add(time.Duration(2000*time.Millisecond))
fmt.Println(time2.Format("2006-01-02 15:04:05"))

time2,err := time.Parse("2006-01-02 15:04:05","2022-05-11 15:04:05")
if err != nil {
	fmt.Println(err)
}
fmt.Println(time2.Format("2006-01-02 15:04:05"))

package main

import (
    "fmt"
    "time"
)

func main() {
    t := time.Now() // 获取当前时间
    fmt.Printf("当前时间:%v\n", t)
    fmt.Println("年", t.Year())
    fmt.Println("月", t.Month())
    fmt.Println("日", t.Day())
    fmt.Println("时", t.Hour())
    fmt.Println("分", t.Minute())
    fmt.Println("秒", t.Second())
}

const (
    Nanosecond  Duration = 1
    Microsecond          = 1000 * Nanosecond
    Millisecond          = 1000 * Microsecond
    Second               = 1000 * Millisecond
    Minute               = 60 * Second
    Hour                 = 60 * Minute
)