spring task 定时任务实现

二、在web.xml中配置spring

<listener>
<description>Spring监听器</description>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

三、application配置监听器：
<?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: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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd" default-lazy-init="false">

<!-- 注解方式 -->
<context:annotation-config />
<context:component-scan base-package="com.test.task" />
<task:annotation-driven/>

<!-- XML方式 -->
<!-- <bean name="testTask" class="com.test.task.TestTask" lazy-init="false"></bean>
<task:scheduled-tasks>
<task:scheduled ref="testTask" method="print" cron="0/5 * * * * ?"/>
</task:scheduled-tasks> -->

</beans>四、实体类：
package com.test.task;

import java.text.DateFormat;
import java.util.Date;

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

@Component
public class TestTask {
@Scheduled(cron = "*/5 * * * * ?")
public void print(){
String time = DateFormat.getDateTimeInstance().format(new Date());
System.out.println("定时器触发打印"+time);
}
}