使用spring+quartz配置多个定时任务

Spring被用在了越来越多的项目中, quartz也被公认为是比较好用的定时器设置工具, 在这里通过一个demo说明如何使用spring和quartz配置多个定时任务.

环境: eclipse + maven + spring 3.0.6.RELEASE版本 + quartz 1.8.6版本

一. 准备工作

项目目录结构截图:

需要引入的jar包, 这里是采用maven的dependency依赖; 如果没有使用maven, 可以对照着上面的jar包截图一一进行下载. 这里唯一需要注意的就是, 如果使用spring 3.1以下的版本, quartz就需要相应的2.0以下版本, 否则会导致 org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class [org.springframework.scheduling.quartz.CronTriggerBean] for bean with name 'cronTrigger_1' defined in file [E:\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\git-common\WEB-INF\classes\applicationContext.xml]: problem with class file or dependent class; nested exception isjava.lang.IncompatibleClassChangeError: class org.springframework.scheduling.quartz.CronTriggerBean has interface org.quartz.CronTrigger as super class 错误.

后续: 后来使用了spring 4.0.5.RELEASE版本+quartz 2.2.1版本, 还是报出了以上错误, 将quartz降低为1.8.6版本后, 问题消失...

<properties><springframework.version>3.0.6.RELEASE</springframework.version></properties><dependencies><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version><scope>provided</scope></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${springframework.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>${springframework.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>${springframework.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${springframework.version}</version></dependency><dependency><groupId>org.quartz-scheduler</groupId><artifactId>quartz</artifactId><version>1.8.6</version></dependency></dependencies>

二. 程序代码及配置代码

测试代码就简单的打印出一句话

package com.quartz.demo;import java.util.Date;public class Job1Demo {public void sayHello() {System.out.println(new Date() + " -> Hello, 我是任务 1");}}

package com.quartz.demo;import java.util.Date;public class Job2Demo {public void sayHello() {System.out.println(new Date() + " -> Hello, 我是任务 2");}}

Spring配置文件applicationContext.xml中配置了要注入的bean, 定时任务, 任务执行周期时间等

<?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:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beans     http://www.springframework.org/schema/beans/spring-beans.xsd    http://www.springframework.org/schema/context     http://www.springframework.org/schema/context/spring-context.xsd    http://www.springframework.org/schema/mvc    http://www.springframework.org/schema/mvc/spring-mvc.xsd"><!-- 任务1配置 --><bean name="job1" class="com.quartz.demo.Job1Demo"/><bean id="jobDetail_1" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"><!-- 执行的类 --><property name="targetObject"><ref bean="job1" /></property><!-- 类中的方法 --><property name="targetMethod"><value>sayHello</value></property></bean><bean id="cronTrigger_1" class="org.springframework.scheduling.quartz.CronTriggerBean"><property name="jobDetail"><ref bean="jobDetail_1" /></property><!-- 每一秒钟执行一次 --><property name="cronExpression"><value>0/1 * * * * ?</value></property></bean><!-- 任务2配置 --><bean name="job2" class="com.quartz.demo.Job2Demo"/><bean id="jobDetail_2" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"><property name="targetObject"><ref bean="job2" /></property><property name="targetMethod"><value>sayHello</value></property></bean><bean id="cronTrigger_2" class="org.springframework.scheduling.quartz.CronTriggerBean"><property name="jobDetail"><ref bean="jobDetail_2" /></property><property name="cronExpression"><value>0/1 * * * * ?</value></property></bean><!-- 总配置 --><bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean"><!-- 添加触发器 --><property name="triggers"><list><ref bean="cronTrigger_1" /><ref bean="cronTrigger_2" /></list></property></bean></beans>

web.xml, 在spring容器启动时读取加载applicationContext.xml配置文件

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app><display-name>Archetype Created Web Application</display-name><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:*.xml</param-value></context-param><!-- Spring 容器启动监听器 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener></web-app>

三. 执行结果

将web项目部署到tomcat等容器中, 启动后, 就可以看到定时器执行效果, 如下图所示