Go语言实现简易命令行定时提醒程序的示例代码

package main

import (
	"flag"
	"fmt"
	"time"
)

func main() {
	// 定义命令行参数
	after := flag.Duration("after", 10*time.Second, "提醒时间，例如 10s、1m、2h")
	msg := flag.String("msg", "时间到啦！", "提醒内容")
	flag.Parse()

	fmt.Printf("⏳ 已设置提醒: %s 后提醒 -> %s\n", after.String(), *msg)

	// 使用定时器
	timer := time.NewTimer(*after)

	// 等待定时触发
	<-timer.C
	fmt.Printf("🔔 提醒: %s\n", *msg)
}

go run main.go -after=10s -msg="喝水提醒"

go run main.go -after=1m -msg="开会啦"

package main

import (
	"fmt"
	"time"
)

type Reminder struct {
	After time.Duration
	Msg   string
}

func main() {
	reminders := []Reminder{
		{After: 5 * time.Second, Msg: "喝水提醒"},
		{After: 10 * time.Second, Msg: "起身走动一下"},
		{After: 15 * time.Second, Msg: "开会啦"},
	}

	for _, r := range reminders {
		go func(r Reminder) {
			timer := time.NewTimer(r.After)
			<-timer.C
			fmt.Printf("🔔 提醒: %s\n", r.Msg)
		}(r)
	}

	// 阻塞主程序，否则会直接退出
	select {}
}