spring-task定时任务动态配置修改执行时间

来源：互联网发布：阿里云华南编辑：程序博客网时间：2024/06/05 19:38

因项目需要，几个定时任务需要人为动态设置执行时间，于是乎吧，就查阅相关资料，是可以动态设置的，废话不多说，直接上代码，一目了然。

package com.seckill.quartz;import org.springframework.scheduling.Trigger;import org.springframework.scheduling.TriggerContext;import org.springframework.scheduling.annotation.EnableScheduling;import org.springframework.scheduling.annotation.SchedulingConfigurer;import org.springframework.scheduling.config.ScheduledTaskRegistrar;import org.springframework.scheduling.support.CronTrigger;import org.springframework.stereotype.Component;import java.text.SimpleDateFormat;import java.util.Date;/** * Created by loup on 2017/11/11. */@Component@EnableSchedulingpublic class DynamicScheduledTask implements SchedulingConfigurer {    //时间表达式  每2秒执行一次    private String cron = "0/2 * * * * ?";    private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");    @Override    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {        scheduledTaskRegistrar.addTriggerTask(new Runnable() {            @Override            public void run() {                //任务逻辑                System.out.println("---------------start-------------------");                System.out.println("动态修改定时任务参数，时间表达式cron为：" + cron);                System.out.println("当前时间为：" + sdf.format(new Date()));                System.out.println("----------------end--------------------");            }        }, new Trigger() {            @Override            public Date nextExecutionTime(TriggerContext triggerContext) {                CronTrigger cronTrigger = new CronTrigger(cron);                Date nextExecDate = cronTrigger.nextExecutionTime(triggerContext);                return nextExecDate;            }        });    }    public void setCron(String cron) {        this.cron = cron;    }}

这个是定时任务调度执行器，采用的是注解的方式。首先要动态配置，要设置为@EnableScheduling，这是确保能够动态，然后实现SchedulingConfigurer，重写configureTasks方法，接下来就是这个的相关spring配置文件，要引入下面这个task，不然识别不了啊，配置文件就是这么简单

http://www.springframework.org/schema/task

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xmlns:task="http://www.springframework.org/schema/task"       xmlns:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/task        http://www.springframework.org/schema/task/spring-task.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">    <context:component-scan base-package="com.seckill.quartz"/>    <task:annotation-driven /></beans>

接下来就是写测试类，测试可不可行啊

package com.seckill.quartz;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import java.io.IOException;/** * Created by loup on 2017/11/11. */@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration({"classpath*:/conf/spring-quartz.xml"})public class QuartzTest {    @Autowired    private DynamicScheduledTask dynamicScheduledTask;    @Test    public void test1(){        try {            Thread.sleep(10000);        } catch (InterruptedException e) {            e.printStackTrace();        }        dynamicScheduledTask.setCron("0/10 * * * * ?");        try {            System.in.read();        } catch (IOException e) {            e.printStackTrace();        }    }}

运行测试类，查看结果，达到效果，亲测可用

阅读全文

0 0