Go之time包用法 golangtime

Go之time包用法 time包提供了时间的显示和测量用的函数。日历的计算采用的是公历。
time 类型

type Time struct { // wall and ext encode the wall time seconds, wall time nanoseconds, // and optional monotonic clock reading in nanoseconds. // // From high to low bit position, wall encodes a 1-bit flag (hasMonotonic), // a 33-bit seconds field, and a 30-bit wall time nanoseconds field. // The nanoseconds field is in the range [0, 999999999]. // If the hasMonotonic bit is 0, then the 33-bit field must be zero // and the full signed 64-bit wall seconds since Jan 1 year 1 is stored in ext. // If the hasMonotonic bit is 1, then the 33-bit field holds a 33-bit // unsigned wall seconds since Jan 1 year 1885, and ext holds a // signed 64-bit monotonic clock reading, nanoseconds since process start. wall uint64 extint64// loc specifies the Location that should be used to // determine the minute, hour, month, day, and year // that correspond to this Time. // The nil location means UTC. // All UTC times are represented with loc==nil, never loc==&utcLoc. loc *Location }

time可以精确到纳秒
示例

package mainimport ( "fmt" "time" )func main() { t:=time.Now() fmt.Println(t)//获取当前时间2021-09-23 10:55:44.831571 +0800 CST m=+0.000090412 fmt.Println(t.Unix())//获取当前时间时间戳 1632366278 fmt.Println(t.UnixMilli())//获取当前时间毫秒 1632366278605 fmt.Println(t.UnixMicro())//获取当前时间微秒 1632366278605122 fmt.Println(t.UnixNano())//获取当前时间时纳秒 1632366278605122000 fmt.Println(t.Hour())//获取当前小时 10 fmt.Println(t.Day())//获取当前天 23 fmt.Println(t.Weekday())//获取当前周Thursday fmt.Println(t.ISOWeek())//获取当前周2021 38//格式化当前时间表示 fmt.Println(t.String())//字符型 fmt.Println(t.Format("2006-01-02 15:04:05"))//2021-09-23 11:12:42 fmt.Println(t.Format("2006-01-02"))//2021-09-23 fmt.Println(t.Format("15:04:05"))//11:12:42//指定时间戳转换 fmt.Println(time.Unix(1632366278, 0).Format("2006-01-02 15:04:05"))//2021-09-23 11:04:38 //指定时间转时间戳 tm2, _ := time.Parse("2006-01-02 15:04:05", "2021-09-23 11:04:38") fmt.Println( tm2.Unix())//1632395078//"2021-09-08T08:18:46+08:00" 转2021-09-08 08:18:46 t, _= time.Parse(time.RFC3339, "2021-09-08T08:18:46+08:00") fmt.Println(t.Format("2006-01-02 15:04:05")) //2021-09-07T17:01:34.182659088Z 转2021-09-07 17:01:34 t, _= time.Parse(time.RFC3339Nano, "2021-09-07T17:01:34.182659088Z") fmt.Println(t.Format("2006-01-02 15:04:05")) //其他格式类似可参考//ANSIC= "Mon Jan _2 15:04:05 2006" //UnixDate= "Mon Jan _2 15:04:05 MST 2006" //RubyDate= "Mon Jan 02 15:04:05 -0700 2006" //RFC822= "02 Jan 06 15:04 MST" //RFC822Z= "02 Jan 06 15:04 -0700" // 使用数字表示时区的RFC822 //RFC850= "Monday, 02-Jan-06 15:04:05 MST" //RFC1123= "Mon, 02 Jan 2006 15:04:05 MST" //RFC1123Z= "Mon, 02 Jan 2006 15:04:05 -0700" // 使用数字表示时区的RFC1123 //RFC3339= "2006-01-02T15:04:05Z07:00" //RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00" //Kitchen= "3:04PM" //// 方便的时间戳 //Stamp= "Jan _2 15:04:05" //StampMilli = "Jan _2 15:04:05.000" //StampMicro = "Jan _2 15:04:05.000000" //StampNano= "Jan _2 15:04:05.000000000"//设置时区 Location //默认UTC loc, _ := time.LoadLocation("") // 服务器设定的时区，一般为CST //loc, _ := time.LoadLocation("Local") //loc, _ := time.LoadLocation("Asia/Shanghai") t.In(loc).Format("2006-01-02 15:04:05"); //1.5s后 now := time.Now() tp, _ := time.ParseDuration("1.5s") fmt.Println(tp,tp.Truncate(1000), tp.Seconds(), tp.Nanoseconds()) m1 := now.Add(tp) fmt.Println(m1)//2021-09-23 14:30:42.006213 +0800 CST m=+1.500352171//1个小时前 tp, _ = time.ParseDuration("-1h")m1 = now.Add(tp) fmt.Println(m1)//2021-09-23 13:30:40.506213 +0800 CST m=-3599.999647829 //休眠时间 //time.Sleep(time.Duration(10) * time.Second)// func After(d Duration) <-chan Time非阻塞,可用于延迟 //time.After(time.Duration(10) * time.Second)// func Since(t Time) Duration 两个时间点的间隔 start := time.Now() fmt.Println(time.Since(start))// 等价于 Now().Sub(t)，可用来计算一段业务的消耗时间//func Until(t Time) Duration//等价于 t.Sub(Now())，t与当前时间的间隔time3 := "2021-03-20 08:50:29" time4 := "2021-03-20 08:50:29" //先把时间字符串格式化成相同的时间类型 t3, _ := time.Parse("2006-01-02 15:04:05", time3) t4, _ := time.Parse("2006-01-02 15:04:05", time4)fmt.Println(t3.Equal(t4)) //truenow = time.Now() //Ticker 类型包含一个 channel，有时我们会遇到每隔一段时间执行的业务(比如设置心跳时间等)，就可以用它来处理，这是一个重复的过程// 无法取消 //tick := time.Tick(1 * time.Minute) //for _ = range tick { //// do something //} //NewTicker返回一个新的Ticker，该Ticker包含一个通道字段，并会每隔时间段d就向该通道发送当时的时间。它会调整时间间隔或者丢弃tick信息以适应反应慢的接收者。如果d<=0会panic。关闭该Ticker可以释放相关资源。 // 可通过调用ticker.Stop取消 //创建一个周期性的定时器 //设置定时器为3秒 timer := time.NewTimer(3 * time.Second) fmt.Println("当前时间为:", time.Now())t = <-timer.C //从定时器拿数据 fmt.Println("当前时间为:", t) timer.Stop()//停止}

links 【Go之time包用法】https://studygolang.com/pkgdoc