最简单spring task 定时任务实现

第一步：spring工程里导入spring所必要的jar包

第二步：在web.xml中追加配置

第三步：在applicationContext.xml中配置监听器

<?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">

    
    <!-- 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>

第四步：编写定时任务类

package jp.co.nttdata.tsr.app.cdb01;

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.getDateInstance().format(new Date());
		System.out.println("定时器触发打印"+time);
	}
}

第五步：启动tomcat，测试，OK，成功！