dateTime := time.Now()
fmt.Println(dateTime)

year := time.Now().Year() //年

fmt.Println(year)

month := time.Now().Month() //月
fmt.Println(month)

day := time.Now().Day() //日
fmt.Println(day)

hour := time.Now().Hour() //小时
fmt.Println(hour)

minute := time.Now().Minute() //分钟
fmt.Println(minute)

second := time.Now().Second() //秒
fmt.Println(second)

nanosecond := time.Now().Nanosecond() //纳秒
fmt.Println(nanosecond)

timeUnix := time.Now().Unix()     //单位秒
timeUnixNano := time.Now().UnixNano() //单位纳秒
  
fmt.Println(timeUnix)
fmt.Println(timeUnixNano)

fmt.Println(time.Now().Format("2006-01-02 15:04:05"))

var timeUnix int64 = 1562555859
fmt.Println(time.Unix(timeUnix,0))

// 之后可以用Format 比如
fmt.Println(time.Unix(timeUnix, 0).Format("2006-01-02 15:04:05"))

t := time.Date(2014, 1, 7, 5, 50, 4, 0, time.Local).Unix()

fmt.Println(t)

currentTime := time.Now()
startTime := time.Date(currentTime.Year(), currentTime.Month(), currentTime.Day(), 0, 0, 0, 0, currentTime.Location())
fmt.Println(startTime)
fmt.Println(startTime.Format("2006/01/02 15:04:05"))

currentTime := time.Now()
endTime := time.Date(currentTime.Year(), currentTime.Month(), currentTime.Day(), 23, 59, 59, 0, currentTime.Location())
fmt.Println(endTime)
fmt.Println(endTime.Format("2006/01/02 15:04:05"))

m, _ := time.ParseDuration("-1m")
result := currentTime.Add(m)

fmt.Println(result)
fmt.Println(result.Format("2006/01/02 15:04:05"))

m, _ := time.ParseDuration("-1h")
result := currentTime.Add(m)
fmt.Println(result)
fmt.Println(result.Format("2006/01/02 15:04:05"))

m, _ := time.ParseDuration("1m")
result := currentTime.Add(m)

fmt.Println(result)
fmt.Println(result.Format("2006/01/02 15:04:05"))

m, _ := time.ParseDuration("1h")
result := currentTime.Add(m)
fmt.Println(result)
fmt.Println(result.Format("2006/01/02 15:04:05"))

afterTime, _ := time.ParseDuration("1h")
result := currentTime.Add(afterTime)

beforeTime, _ := time.ParseDuration("-1h")
result2 := currentTime.Add(beforeTime)

m := result.Sub(result2)
fmt.Printf("%v 分钟 \n", m.Minutes())

h := result.Sub(result2)
fmt.Printf("%v小时 \n", h.Hours())

d := result.Sub(result2)
fmt.Printf("%v 天\n", d.Hours()/24)

stringTime, _ := time.Parse("2006-01-02 15:04:05", "2019-12-12 12:00:00")
beforeOrAfter := stringTime.After(time.Now())

if true == beforeOrAfter {
  fmt.Println("2019-12-12 12:00:00在当前时间之后!")
} else {
  fmt.Println("2019-12-12 12:00:00在当前时间之前!")
}

startTime := time.Now()
time.Sleep(time.Second * 5)

fmt.Println("离现在过去了：", time.Since(startTime))