spring自带的定时任务功能，基于注解和xml配置

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的定时器任务

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");  
    }  
}

运行结果：
Annotation：print run
Annotation：print run
Annotation：print run
XMl:print run
XMl:is show run
Annotation：print run
Annotation：print run

spring定时任务执行两次bug参考链接：http://nkliuliu.iteye.com/blog/816335

转载链接:http://blog.csdn.net/wxwzy738/article/details/25158787