013.JAVA定时任务注解开发

1.启动类 

package com.vue;

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

@EnableScheduling
@SpringBootApplication
public class Starter {
    public static void main(String[] args) {
        SpringApplication.run(Starter.class, args);
    }

}

2.定义类

package com.vue.timedtask;

import com.vue.dto.StudentInfo;
import com.vue.mapper.TestMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class TimeTask {

    @Autowired
    private TestMapper  testMapper;

    @Scheduled(cron = "*/5 * * * * ?")
    public void scheduledTask(){
        System.out.println("定时任务1");
    }
    @Scheduled(initialDelay = 1000 * 10,fixedRate = 1000 * 3)
    public void  scheduledTask2(){
        System.out.println("任务2执行时间："+System.currentTimeMillis());
        System.out.println("定时任务2");
        StudentInfo id = testMapper.findStudentById("二傻");
        System.out.println(id);
        try {
            Thread.sleep(2*1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("任务2结束时间："+System.currentTimeMillis());
    }

    @Scheduled(initialDelay = 1000 * 10,fixedRate = 1000 * 5)
    public void scheduledTask3(){
        System.out.println("任务3执行时间："+System.currentTimeMillis());
        System.out.println("定时任务3");
        StudentInfo id = testMapper.findStudentById("庸俗");
        System.out.println(id);
        try {
            Thread.sleep(2*1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("任务3结束任务："+System.currentTimeMillis());
    }

}

 运行结果