spring自带的定时任务功能，基于注解和xml配置

1、spring的配置文件

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p"
	xmlns:task="http://www.springframework.org/schema/task"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="
        http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
        http://www.springframework.org/schema/jee
        http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        http://www.springframework.org/schema/task
        http://www.springframework.org/schema/task/spring-task-3.0.xsd">

     <task:annotation-driven /> <!-- 定时器开关-->

     <bean id="myTaskXml" class="com.spring.task.MyTaskXml"></bean>

     <task:scheduled-tasks>
	 <!-- 这里表示的是每隔五秒执行一次 -->
	 <task:scheduled ref="myTaskXml" method="show" cron="*/5 * * * * ?" />
	 <task:scheduled ref="myTaskXml" method="print" cron="*/10 * * * * ?"/>
     </task:scheduled-tasks>

     <!-- 自动扫描的包名 -->
     <context:component-scan base-package="com.spring.task" />

</beans>

2、基于xml的定时器任务

package com.spring.task;  

/**
 * 基于xml的定时器
 * @author hj
 */
public class MyTaskXml {  

    public void show(){
        System.out.println("XMl:is show run");
    }  

    public void print(){
        System.out.println("XMl:print run");
    }
}

3、基于注解的定时器任务

    package com.spring.task;  

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

    /**
     * 基于注解的定时器
     * @author hj
     */
    @Component
    public class MyTaskAnnotation {  

        /**
         * 定时计算。每天凌晨 01:00 执行一次
         */
        @Scheduled(cron = "0 0 1 * * *")
        public void show(){
            System.out.println("Annotation：is show run");
        }  

        /**
         * 心跳更新。启动时执行一次，之后每隔2秒执行一次
         */
        @Scheduled(fixedRate = 1000*2)
        public void print(){
            System.out.println("Annotation：print run");
        }
    }  

4、测试

package com.spring.test;  

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

public class Main {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("spring-mvc.xml");
    }
}

运行结果：

Annotation：print run

Annotation：print run

Annotation：print run

XMl:print run

XMl:is show run

Annotation：print run

Annotation：print run

spring定时任务执行两次bug参考链接：http://nkliuliu.iteye.com/blog/816335

转载链接:http://blog.csdn.net/wxwzy738/article/details/25158787