springboot cron定时器

定时任务一个类

package com.example.main.cron;

import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
@Configuration      //1.主要用于标记配置类，兼备Component的效果。
@EnableScheduling   // 2.开启定时任务
public class CronTask {
    // Every hour on the hour
    @Scheduled(cron = "*/5 * * * * ?")
//    每隔5秒执行一次
    public void fiveSecond() {
        System.out.println("每隔5秒执行一次打印");
    }
}