Golang 日期/時間包的使用詳解

// 構(gòu)建時區(qū)
var timeLocation *time.Location
timeLocation, _ = time.LoadLocation("")       //UTC
timeLocation, _ = time.LoadLocation("UTC")      //UTC
timeLocation, _ = time.LoadLocation("Local")     //Local
timeLocation, _ = time.LoadLocation("Asia/Shanghai") //使用時區(qū)碼

//golang的時間格式化pattern
var timeLayout = "2006-01-02 15:04:05"

// 獲取當(dāng)前時間對象
var timer time.Time
timer = time.Now()

// 為時間設(shè)定時區(qū) 可以通過 timer.Local()/timer.UTC() 快速設(shè)定時區(qū)
timer.In(timeLocation)

// 獲取當(dāng)前秒級時間戳
var curTimestamp int64
curTimestamp = timer.Unix()
println("current timestamp:" + strconv.FormatInt(curTimestamp, 10))

// 獲取當(dāng)前納秒及時間戳 1秒=1000毫秒=1000,000微妙=1000,000,000納秒
var curNanoTimestamp int64
curNanoTimestamp = timer.UnixNano()
println("current nano timestamp:" + strconv.FormatInt(curNanoTimestamp, 10))

// 獲取本地時間的時區(qū)/快速獲取時區(qū)時間/自定義格式
timeZone, _ := timer.Zone()
fmt.Printf("time zone: %s\n", timeZone)
fmt.Printf("time location: %s\n", timer.Location())
fmt.Printf("time in local zone: %s\n", timer.Local().String())
fmt.Printf("time in utc zone: %s\n", timer.UTC().String())
fmt.Printf("time: %s\n", timer.String())
fmt.Printf("time formatted: %s\n", timer.Format("2006-01-02 15:04:05"))

// 獲取當(dāng)前的年/月/日 時:分:秒 納秒
fmt.Printf("current year: %d\n", timer.Year())
fmt.Printf("current month: %d %s\n", timer.Month(), timer.Month()) //返回的Month對象
fmt.Printf("current day: %d\n", timer.Day())
fmt.Printf("current hour: %d\n", timer.Hour())
fmt.Printf("current minute: %d\n", timer.Minute())
fmt.Printf("current second: %d\n", timer.Second())
fmt.Printf("current nanosecond: %d\n", timer.Nanosecond())

// 獲取當(dāng)前時間/日期
curHour, curMinute, curSecond := timer.Clock()
fmt.Printf("current clock: %d:%02d:%02d\n", curHour, curMinute, curSecond)
curYear, curMonth, curDay := timer.Date()
fmt.Printf("current date: %d-%02d-%02d\n", curYear, curMonth, curDay)

// 已當(dāng)前時間為基增長年/月/日后的時間對象
timerAdded := timer.AddDate(1, 2, 3)
curYear, curMonth, curDay = timerAdded.Date()
fmt.Printf("current date: %d-%02d-%02d\n", curYear, curMonth, curDay)

// 以當(dāng)前時間為基增長N納秒后的時間對象 比如增長了一天
timeDuration, _ := time.ParseDuration("24h")
timerAdded = timer.Add(timeDuration)
// 計算兩個時間的差值 返回的是納秒 按需求自行計算其他單位
// Duration is type of int64 and nanoseconds
timeDuration = timerAdded.Sub(timer)
fmt.Printf("days duration between %s~%s: %d\n",
  timerAdded.Format(timeLayout),
  timer.Format(timeLayout),
  timeDuration/1000/1000/1000/24/60/60)

// 使用時間串獲取時間對象
timer, _ = time.Parse(timeLayout, "2018-08-08 08:08:08")
// 使用時間串獲取時間對象 并設(shè)定時區(qū)
timer, _ = time.ParseInLocation(timeLayout, "2018-08-08 08:08:08", timeLocation)
// 使用Unix時間戳構(gòu)建時間對象
timer = time.Unix(1552368806, 0) //2019-03-12 13:33:26的Unix時間戳
fmt.Println(timer.Format(timeLayout))

// 獲取當(dāng)前時間是本年第幾天 本周第幾天
fmt.Printf("year day: %d, week day: %d\n", timer.YearDay(), timer.Weekday())

// 使用表征字符串轉(zhuǎn)換時間跨度
timeDuration, _ = time.ParseDuration("300s")
fmt.Printf("nanosecond: %d\n", timeDuration)
timeDuration, _ = time.ParseDuration("300us")
fmt.Printf("nanosecond: %d\n", timeDuration)