在Spring3中使用注解(@Scheduled)创建计划任务源码

web.xml配置：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
  <display-name></display-name>    
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value> /WEB-INF/classes/applicationContext.xml</param-value>
  </context-param>
 
  <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

</web-app>

applicationContext.xml配置：
<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:task="http://www.springframework.org/schema/task"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
    http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context-2.5.xsd
    http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd"
    >
<context:component-scan base-package="com.zywang.spring.task" />
<task:executor id="executor" pool-size="5" />
<task:scheduler id="scheduler" pool-size="10" />
<task:annotation-driven executor="executor" scheduler="scheduler" />

</beans>

java代码：
package com.zywang.spring.task;

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

@Component
public class SpringTaskDemo {
    @Scheduled(fixedDelay = 5000)
    void doSomethingWithDelay() {
        System.out.println("I'm doing with delay now!");
    }
    
    @Scheduled(fixedRate = 5000)  
    void doSomethingWithRate(){  
        System.out.println("I'm doing with rate now!");  
    }  
      
    @Scheduled(cron = "0/5 * * * * *")  
    void doSomethingWith(){  
        System.out.println("I'm doing with cron now!");  
    }

}