go实现定时功能两种方法

1：timer

学习自：https://studygolang.com/articles/2479

timer1 := time.NewTimer(time.Second * 2)

//此处在等待channel中的信号，执行此段代码时会阻塞两秒

<-timer1.C

timer1 := time.NewTimer(time.Second * 2)

//此处在等待channel中的信号，执行此段代码时会阻塞两秒

<-timer1.C


ticker := time.NewTimer(time.Second)
for_ =range ticker.C{

}

或者

for {
    select {
    case <-timer.C:
    func()
    }
}

timer中：

type Ticker struct {
        C <-chan Time // The channel on which the ticks are delivered.
        r runtimeTimer
}
C只能读不能写
https://studygolang.com/articles/4565

2："github.com/robfig/cron"中的cron

package main

import (

"github.com/robfig/cron"

"log"

)

func main() {

i := 0

c := cron.New()

spec := "*/5 * * * * ?"

c.AddFunc(spec, func() {

i++

log.Println("cron running:", i)

})

c.AddFunc("@every 1h1m", func() {

i++

log.Println("cron running:", i)

})

c.Start()

}