目录
time.Sleep
time.Sleep可以实现延时执行
            
            
              Go
              
              
            
          
          func TestSleep(t *testing.T) {
	fmt.Println("start time:", time.Now().Format("2006-01-02 15:04:05.000"))
	time.Sleep(2 * time.Second)
	fmt.Println("end   time:", time.Now().Format("2006-01-02 15:04:05.000"))
}time.After
time.After也可以实现延迟执行。返回一个只读的time.Time类型的channel,读取到的是延迟后的当前时间
            
            
              Go
              
              
            
          
          func TestAfter(t *testing.T) {
	fmt.Println("start time:", time.Now().Format("2006-01-02 15:04:05.000"))
	var timer <-chan time.Time = time.After(2 * time.Second)
	now := <-timer
	fmt.Println("end   time:", now.Format("2006-01-02 15:04:05.000"))
}time.NewTimer
time.NewTimer可以实现延迟执行,并且还提供了重置延迟时间的接口实现定时器。timer.C返回的是一个只读的time.Time类型的channel,读取到的是延迟后的当前时间
            
            
              Go
              
              
            
          
          func TestTimer(t *testing.T) {
	fmt.Println("start time:", time.Now().Format("2006-01-02 15:04:05.000"))
	var timer *time.Timer = time.NewTimer(2 * time.Second)
	for now := range timer.C {
		timer.Reset(3 * time.Second)
		fmt.Println("now   time:", now.Format("2006-01-02 15:04:05.000"))
	}
}time.NewTicker
time.NewTicker直接实现了定时器。
            
            
              Go
              
              
            
          
          func TestTicker(t *testing.T) {
	fmt.Println("start time:", time.Now().Format("2006-01-02 15:04:05.000"))
	ticker := time.NewTicker(2 * time.Second)
	for now := range ticker.C {
		fmt.Println("now   time:", now.Format("2006-01-02 15:04:05.000"))
	}
}