SpringBoot定时任务@Scheduled

1.SpringBoot使⽤用注解⽅方式开启定时任务

@SpringBootApplication
@ServletComponentScan
//启动类⾥里里⾯面 @EnableScheduling开启定时任务，⾃自动扫描
@EnableScheduling
public class Demo001Application {

    public static void main(String[] args) {
        SpringApplication.run(Demo001Application.class, args);
    }

}

package com.xiaobing.demo001.schedule;

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

import java.time.LocalDateTime;
//定时任务业务类 加注解 @Component被容器器扫描
@Component
public class TimingTask {

    //定时任务，5秒执行一次
    //@Scheduled(fixedRate = 5000)
    //cron 定时任务表达式 @Scheduled(cron="*/1 * * * * *") 表示每秒
    @Scheduled(cron="*/5 * * * * *")
    public void sum1() {
        //业务逻辑省略
        System.out.println("定时任务: " + LocalDateTime.now());
    }
}

启动项目:

crontab 在线工具参考:https://tool.lu/crontab/