spring 定時任務

本文前提，確保自己的web項目可以正常運行，即spring基本依賴包本地齊全。

spring的定時任務有3種，一一驗證，親測可用。

一、Spring-Task

xml配置  (注意不要漏掉  xmlns:task="http://www.springframework.org/schema/task")

<?xml version="1.0" encoding="UTF-8"?>
<beans  xmlns="http://www.springframework.org/schema/beans" 	
		xmlns:task="http://www.springframework.org/schema/task"
		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
		xsi:schemaLocation="http://www.springframework.org/schema/beans
						   http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
						   http://www.springframework.org/schema/task 
					       http://www.springframework.org/schema/task/spring-task.xsd"
						   >
	
	<!-- Spring定時器註解開關-->  
    <task:annotation-driven />  
    
    <bean id="userTask" class="com.camelot.openplatform.usercenter.web.UserTask"/>
    
     <task:scheduled-tasks >  
        <task:scheduled ref="userTask" method="pringTask" cron="0/2 * * * * *"/>  
    </task:scheduled-tasks>  
</beans>

cron表達式見 http://www.blogjava.net/hao446tian/archive/2012/02/13/369872.html

pojo

package com.camelot.openplatform.usercenter.web;

public class UserTask {

	public void pringTask(){
		System.out.println("task:scheduled-tasks-----------------tests");
	}
	
}

二、Quartz  (需要添加quartz-2.2.0.jar)

<?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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
						   http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
	
	<!-- 要調用的工作類 -->
   <bean id="userTask" class="com.camelot.openplatform.usercenter.web.UserTask"/>
    <!-- 定義調用對象和調用對象的方法 -->
    <bean id="userTaskDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <!-- 調用的類 -->
        <property name="targetObject">
            <ref bean="userTask"/>
        </property>
        <!-- 調用類中的方法 -->
        <property name="targetMethod">
            <value>quartzTask</value>
        </property>
    </bean>
    <!-- 定義觸發時間 -->
    <bean id="userTaskTime" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
        <property name="jobDetail">
            <ref bean="userTaskDetail"/>
        </property>
        <!-- cron表達式 -->
        <property name="cronExpression">
            <value>0/5 * * * * ?</value>
        </property>
    </bean>
       
    <!-- 總管理類 如果將lazy-init='false'那麼容器啓動就會執行調度程序  -->

    <bean id="startQuertz" lazy-init="false" autowire="no" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="userTaskTime"/>
            </list>
        </property>
    </bean>
	
</beans>

pojo

package com.camelot.openplatform.usercenter.web;

public class UserTask {

	public void quartzTask(){
		System.out.println("quartz-tasks-----------------tests");
	}
}

三、註解方式

xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:task="http://www.springframework.org/schema/task" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
						   http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
						   http://www.springframework.org/schema/task
						   http://www.springframework.org/schema/task/spring-task.xsd">
	<!-- pool-size="1-4"，表示線程池活躍的線程數爲1，最大線程數爲4 -->
	<task:executor id="executor" pool-size="5" /> 
	<task:scheduler id="scheduler" pool-size="10" /> 
	<task:annotation-driven executor="executor" scheduler="scheduler" /> 
</beans>

pojo

package com.camelot.openplatform.usercenter.web;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component    
public class TaskJob {    
	@Scheduled(cron="0/5 * *  * * ? ")   //每5秒執行一次
    public void job1() {    
        System.out.println("TaskJob---任務進行中。。。\n");    
        System.out.println(Thread.currentThread().getName());
    }    
}   

注意，此種方式需要在主配置文件中加入，組件掃描，否則@comment掃描不到，定時任務不會執行

<context:component-scan base-package="com.camelot"/>

四、引用

方式一以及方式二，作者都是以 spring-task.xml文件單獨存放便於管理 通常在 spring-context.xml 中引入

<!-- 定時任務 -->
	<import resource="spring/spring-task.xml" />

附加：如果需要通過profile 控制定時任務是否執行(添加 <beans profile="userTask">)

<beans profile="userTask">
    <bean id="startQuertz" lazy-init="false" autowire="no" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="userTaskTime"/>
            </list>
        </property>
    </bean>
</beans>

同時 web.xml中需要添加

<context-param>
	  <param-name>spring.profiles.active</param-name>
	  <param-value>userTask</param-value>
  </context-param>

profile 的使用見:  http://stevex.blog.51cto.com/4300375/1348307/