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一、引入spring相關jar包：

spring task 定時任務實現示例

二、在web.xml中配置spring

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									<listener>

									  <description>Spring監聽器</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、在applicationContext.xml中配置監聽器

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									<?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、編寫實體類

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									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("定時器觸發打印"+time);

									  }

									}