spring3中使用注解方式实现定时器调度任务

2013-11-05 15:25:42

1首先在applicationContext.xml中引入

<!-- 
spring3.0注解定时器任务
xmlns:task="http://www.springframework.org/schema/task"
                   
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">
-->                    

2打开定时器开关

不使用注解时，<task:scheduled ref="taskTest" method="hello" cron="10/5 * * * * ?"/>

<task:scheduled ref = "实体类的beanid" method="方法名" cron="表达式">

<!-- 定时器开关 -->
　　
　　

    <task:annotation-driven/>

    <!-- cron="10/5 * * * * ?" 每分钟延迟10秒开始执行,5秒执行一次 
    <bean id = "taskTest" class="com.test.task.TaskTest"></bean>
    <task:scheduled-tasks>
        <task:scheduled ref="taskTest" method="say"   cron="10/5 * * * * ?"/>
        <task:scheduled ref="taskTest" method="hello" cron="10/5 * * * * ?"/>
    </task:scheduled-tasks>
    -->

3编写任务实例
使用注解时在类头部添加@Component 方法头部添加@Scheduled

package com.test.task;

import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class TaskTest {
    public void say(){
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("时间为："+ sdf.format(date));
    }
    
    public void hello(){
        System.out.println("HelloWorld");
    }
    
    @Scheduled(fixedDelay = 5000)  
    void doSomethingWithDelay(){  
        System.out.println("I'm doing with delay now!");  
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("基于注解的定时器启动,时间为："+ sdf.format(date));
    }  
      
    @Scheduled(fixedRate = 5000)  
    void doSomethingWithRate(){  
        System.out.println("I'm doing with rate now!");  
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("基于注解的定时器启动,时间为："+ sdf.format(date));
    }  
      
    @Scheduled(cron = "0/5 * * * * *")  
    void doSomethingWith(){  
        System.out.println("I'm doing with cron now!");  
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("基于注解的定时器启动,时间为："+ sdf.format(date));
    }  

}

常用cron 表达式：http://wenku.baidu.com/link?url=mbfyoa3VGn57euEd1jC-VKkrpimxZx7RSLs4VkF_ZCIDna2AnioEIbKnDJDtqfyHtG6X0-LGVcWFmgNQ_slujsISy5iHCRsHEj4UAnHnuXq