go: time包

1.time.Time类型，用来表示时间

2.获取当前时间

now := time.Now()

now := time.Now().Day()

now := time.Now().Minute()

now := time.Now().Month()

now := time.Now().Year()

3.格式化

fmt.Printf("%02d%02d%02d %02d:%02d:%02d",now.Year()....)
now := time.Now() //获取当前时间
fmt.Printf(now.Format("02/1/2006 15:04"))

fmt.Printf(now.Format("2006/1/02 15:04"))

fmt.Printf(now.Format("2006/1/02"))

//格式化时要转化为的时间格式必须写 2006/1/02 15:04 即go的诞生时间

4.获取纳秒

time.Duration

5.一些常量

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

6.获取时间戳

time.Now().Unix() //获取当前时间戳
time.Now().UnixNano() //获取当前时间戳纳秒