spring自带的定时任务功能，基于注解和xml配置

基于注解和xml的配置，可以分离出来单独使用。

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");
    }
}