定时任务

启动页

package com.yunda.demo2;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;


@EnableScheduling  //开启定时任务
@EnableAsync  //开启异步
@SpringBootApplication
public class Demo2Application {

    public static void main(String[] args) {
        SpringApplication.run(Demo2Application.class, args);
    }

}

定时任务注解

package com.yunda.demo2.task;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

@Service
public class TaskC {
//秒 ，分 ，时 ，日 ，月  ，周
    @Scheduled(cron = "0 * * * * MON-SAT")  //定时任务注解，整分钟
@Scheduled(cron = "0,1,2,3 * * * * MON-SAT")  //定时任务注解，整分钟  逗号是枚举
@Scheduled(cron = "0-3 * * * * MON-SAT")  //定时任务注解，整分钟   -代表区间
@Scheduled(cron = "0/3 * * * * MON-SAT")  //定时任务注解，整分钟    /代表步长 ，每3秒执行一次
    public  void hello(){
        System.out.println("我啊是你的");
    };
}

异步

package com.yunda.demo2.task;

import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

@Service
public class Taskwang {

    @Async   //异步注解
    public void hello(){
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("王胜波ceLLL");
    }
}

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