1.在启动类上加上@EnableScheduling开启定时任务,具体的代码如下: 2.创建定时任务类 package com.yangjunbo.JPADemo.scheduled; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.stereotype.Component; import java.text....