Spring Boot 动态修改定时任务cron参数

动态修改定时任务cron参数

	不需要重启应用就可以动态的改变Cron表达式的值不能使用@Scheduled(cron = "${jobs.cron}")实现

动态定时任务类DynamicScheduledTask

package com.jege.spring.boot.task;import java.text.SimpleDateFormat;
import java.util.Date;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.Trigger;
import org.springframework.scheduling.TriggerContext;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;import com.jege.spring.boot.data.jpa.entity.User;
import com.jege.spring.boot.data.jpa.repository.UserRepository;/*** 动态修改定时任务cron参数*/
@Component
public class DynamicScheduledTask implements SchedulingConfigurer {private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");private static final String DEFAULT_CRON = "0/5 * * * * ?";private String cron = DEFAULT_CRON;@Autowiredprivate UserRepository userRepository;@Overridepublic void configureTasks(ScheduledTaskRegistrar taskRegistrar) {taskRegistrar.addTriggerTask(new Runnable() {@Overridepublic void run() {if (!cron.equals(DEFAULT_CRON)) {User user = new User("je_ge", 20);userRepository.save(user);}// 定时任务的业务逻辑System.out.println("动态修改定时任务cron参数，当前时间：" + dateFormat.format(new Date()));}}, new Trigger() {@Overridepublic Date nextExecutionTime(TriggerContext triggerContext) {// 定时任务触发，可修改定时任务的执行周期CronTrigger trigger = new CronTrigger(cron);Date nextExecDate = trigger.nextExecutionTime(triggerContext);return nextExecDate;}});}public void setCron(String cron) {this.cron = cron;}
}

启动类Application添加@EnableScheduling标注

@EnableScheduling

控制器UserController

@Autowired
DynamicScheduledTask dynamicScheduledTask;// 更新动态任务时间
@RequestMapping("/updateDynamicScheduledTask")
@ResponseBody
public AjaxResult updateDynamicScheduledTask() {dynamicScheduledTask.setCron("0/10 * * * * ?");return new AjaxResult().success();
}

user.jsp页面添加按钮方法

updateDynamicScheduledTask : function() {//动态修改定时任务$.get("/user/updateDynamicScheduledTask", function(data) {if (data.meta.success) {//动态修改定时任务成功$.messager.alert('成功提示', "请重新刷新数据，有插入新的数据", 'info');} else {$.messager.alert('错误提示', data.meta.message, 'error');}}, 'json');
}<a href="javascript:void(0)" class="easyui-linkbutton c8" iconCls="icon-search" data-url="updateDynamicScheduledTask">动态修改定时任务</a>