Quartz 框架快速入门（四）

Spring的scheduling.quartz包中对Quartz框架进行了封装，使得开发时不用写任何QuartSpring的代码就可以实现定时任务。Spring通过JobDetailBean，MethodInvokingJobDetailFactoryBean实现Job的定义。后者更加实用，只需指定要运行的类，和该类中要运行的方法即可，Spring将自动生成符合Quartz要求的JobDetail。

在上一篇文章《Quartz 框架快速入门（三）》中我们将示例迁移到Web环境下了，但使用的是Quartz的启动机制，这一篇中我们将让Web服务器启动Spring，通过Spring的配置文件来进行任务的调度

1,创建一个Web项目，加入spring.jar，quartz-1.6.0.jar，commons-collections.jar，jta.jar，commons-logging.jar这几个包.

2,创建一个类，在类中添加一个方法execute,我们将对这个方法进行定时调度.

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->packagecom.vista.quartz;

importjava.util.Date;

importorg.apache.commons.logging.Log;
importorg.apache.commons.logging.LogFactory;
importorg.quartz.JobExecutionContext;
importorg.quartz.JobExecutionException;

publicclassHelloWorld
{
privatestaticLoglogger=LogFactory.getLog(HelloWorld.class);//日志记录器
publicHelloWorld()
{
}
publicvoidexecute()
{
logger.info("KickyourassandFuckyourmother!-"+newDate());
}
}

2. Spring配置文件applicationContext.xml修改如下：

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> --><?xmlversion="1.0"encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

<!--要调用的工作类-->
<beanid="quartzJob"class="com.vista.quartz.HelloWorld"></bean>
<!--定义调用对象和调用对象的方法-->
<beanid="jobtask"class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<!--调用的类-->
<propertyname="targetObject">
<refbean="quartzJob"/>
</property>
<!--调用类中的方法-->
<propertyname="targetMethod">
<value>execute</value>
</property>
</bean>
<!--定义触发时间-->
<beanid="doTime"class="org.springframework.scheduling.quartz.CronTriggerBean">
<propertyname="jobDetail">
<refbean="jobtask"/>
</property>
<!--cron表达式-->
<propertyname="cronExpression">
<value>10,15,20,25,30,35,40,45,50,55****?</value>
</property>
</bean>
<!--总管理类如果将lazy-init='false'那么容器启动就会执行调度程序-->
<beanid="startQuertz"lazy-init="false"autowire="no"class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<propertyname="triggers">
<list>
<refbean="doTime"/>
</list>
</property>
</bean>
</beans>

3,先在控制台中对上面的代码进行测试，我们要做的只是加载Spring的配置文件就可以了，代码如下:

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->packagecom.vista.quartz;

importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;

publicclassTest
{
publicstaticvoidmain(String[]args)
{
System.out.println("Teststart.");
ApplicationContextcontext=newClassPathXmlApplicationContext("applicationContext.xml");
//如果配置文件中将startQuertzbean的lazy-init设置为false则不用实例化
//context.getBean("startQuertz");
System.out.print("Testend..");
}
}

4,然后将Web.xml修改如下，让tomcat在启动时去初始化Spring：

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> --><?xmlversion="1.0"encoding="UTF-8"?>
<web-appversion="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/classes/applicationContext.xml
</param-value>
</context-param>

<servlet>
<servlet-name>SpringContextServlet</servlet-name>
<servlet-class>org.springframework.web.context.ContextLoaderServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

5,最后启动Tomcat,测试结果如下图所示：