Spring 定时执行任务

最新推荐文章于 2024-02-26 07:15:00 发布

转载最新推荐文章于 2024-02-26 07:15:00 发布 · 95 阅读

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原文链接：http://www.cnblogs.com/dongqiSilent/p/5170324.html

本文介绍了Spring框架中定时任务的配置方法及其实现过程。包括XML配置方式启动多个线程执行不同频率的任务，以及如何通过代码动态设置Cron表达式来调整任务执行周期。

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好不容易写了半天的文章竟然由于断网而丢失了，并未自动保存到草稿箱。只能简单的贴贴代码了。

<?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:util="http://www.springframework.org/schema/util"
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
        http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">  
    
     <context:annotation-config />
    <!-- spring扫描注解的配置    -->
    <context:component-scan base-package="com.dong.schedule" />
 	
 	<!--此处如果不配置的话，导致只有一个线程执行任务。  -->
    <task:annotation-driven executor="myExecutor" scheduler="myScheduler"/>
	<task:executor id="myExecutor" pool-size="5"/>
	<task:scheduler id="myScheduler" pool-size="10"/>
</beans>

package com.dong.schedule;

import java.util.Date;

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

@Component
public class ScheduleTask {
	
	 @Scheduled(cron="*/5 * * * * ?")
	    public void demoServiceMethod()
	    {
	        System.out.println("ScheduleTask   "+Thread.currentThread()+"   Method executed at every 5 seconds. Current time is :: "+ new Date());
	    }

	 @Scheduled(cron="*/3 * * * * ?")
	    public void sayHi()
	    {
	        System.out.println("ScheduleTask   "+Thread.currentThread()+"   Method executed at every 3 seconds. Current time is :: "+ new Date());
	    }
}

package com.dong.schedule;

import java.util.Date;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;


/***
 * 代码中动态设置cron表达式的方式。
 */
@Component
public class MyTask {
	@Autowired
	private ThreadPoolTaskScheduler myScheduler;
	
	public void run(){
		//此处可以动态设置
		myScheduler.schedule(new MySchedulerTask(), new CronTrigger("*/2 * * * * ?"));
	}
	
	private class MySchedulerTask implements Runnable{

		@Override
		public void run() {
			// TODO Auto-generated method stub
			 System.out.println("MyTask"+Thread.currentThread()+"   Method executed at every 2 seconds. Current time is :: "+ new Date());
		}
		
	}
	
	
	
}

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {
	public static void main(String[] args) {  
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");  
        MyTask myTask = (MyTask) context.getBean("myTask");
        myTask.run();
    }  
}

　　参考的资料 http://docs.spring.io/spring/docs/current/spring-framework-reference/html/scheduling.html

　　http://howtodoinjava.com/spring/spring-core/4-ways-to-schedule-tasks-in-spring-3-scheduled-example/

　　http://blog.youkuaiyun.com/lmj623565791/article/details/27109467

转载于:https://www.cnblogs.com/dongqiSilent/p/5170324.html