package main


import "time"
import "fmt"


//import "strconv"


func main() {
fmt.Println("time ===============:")
const base_format = "2006-01-02 15:04:05"
//獲取當前時間
nt := time.Now()
fmt.Printf("now datetime:%v\n", nt)


//延時年月日
adnt := nt.AddDate(1,2,3)
fmt.Printf("now adddate:%v\n", adnt)


//延時秒
ant := nt.Add(3600*1e9) //延時1小時=60*60 秒
fmt.Printf("now add:%v\n", ant)


//轉換為時間格式字串
str_time := nt.Format(base_format)
fmt.Printf("now time string:%v\n", str_time)


//時間字串轉換為日期格式
parse_str_time, _ := time.Parse(base_format, str_time)
fmt.Printf("string to datetime :%v\n", parse_str_time)


//時間戳 秒
timestamp := time.Now().Unix()
println("timestamp:", timestamp)
//時間戳 毫秒
msec := time.Now().UnixNano() / 1e6
println("timestamp msec:", msec)


float_ms := msec % timestamp
v := fmt.Sprintf("%.3f\n", float64(float_ms)/1000.0)
println("float msec:", v)


//時間戳轉日期格式
date_time := time.Unix(timestamp, 0)
fmt.Printf("timestamp to datetime:%v\n", date_time)


//時間字串轉時間戳
t, _ := time.Parse(base_format, "2018-01-18 01:01:01")
datetime_str_to_timestamp := t.Unix()
println("datetime_str_to_timestamp:", datetime_str_to_timestamp)
}