如何在每天的特定时间运行作业？

Question

我想每天晚上9点打印出来。如何在 Go 中执行此操作？do my job以下是我到目前为止所得到的：timer := time.NewTimer(3 * time.Second)for {    now := time.Now()    next := now.Add(time.Hour * 24)    todayNine := time.Date(next.Year(), next.Month(), next.Day(), 9, 0, 0, 0, next.Location()).AddDate(0, 0, -1)    todayFifteen := time.Date(next.Year(), next.Month(), next.Day(), 15, 0, 0, 0, next.Location()).AddDate(0, 0, -1)    todayEnd := time.Date(next.Year(), next.Month(), next.Day(), 0, 0, 0, 0, next.Location()).AddDate(0, 0,  -1)    if now.Before(todayNine) {        timer.Reset(todayNine.Sub(now))    } else if now.Before(todayFifteen) {        timer.Reset(todayFifteen.Sub(now))    } else if now.Before(todayEnd) {        timer.Reset(todayEnd.Sub(now))    }    <- timer.C    fmt.Println("do my job")}

Answer 1

我会使用包。https://pkg.go.dev/github.com/robfig/croncron

文档中的示例：

c := cron.New()

c.AddFunc("0 30 * * * *", func() { fmt.Println("Every hour on the half hour") })

c.AddFunc("@hourly",      func() { fmt.Println("Every hour") })

c.AddFunc("@every 1h30m", func() { fmt.Println("Every hour thirty") })

c.Start()

..

// Funcs are invoked in their own goroutine, asynchronously.

...

// Funcs may also be added to a running Cron

c.AddFunc("@daily", func() { fmt.Println("Every day") })

..

// Inspect the cron job entries' next and previous run times.

inspect(c.Entries())

..

c.Stop()  // Stop the scheduler (does not stop any jobs already running).