Quartz Framework Quick Start (iv)

The quartz framework is encapsulated in Spring's Scheduling.quartz package, making it possible to implement timed tasks without having to write any quartspring code at development time. Spring Methodinvokingjobdetailfactorybean Implementation of the JOB definition through Jobdetailbean. The latter is more practical, simply by specifying the classes to run and the methods to be run in the class, and Spring will automatically generate jobdetail that meet the Quartz requirements.

In the previous article, Quartz Framework QuickStart (c), we migrated the example to the Web environment, but we used the Quartz startup mechanism, in which we let the Web server start spring, which is scheduled for tasks through the spring configuration file.

1, create a Web project, join Spring.jar,quartz-1.6.0.jar,commons-collections.jar,jta.jar, Commons-logging.jar these packages.

2, create a class, add a method execute in the class, and we will schedule the method in a timed manner.
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--> package Com.vista.quartz;

Import Java.util.Date;

Import Org.apache.commons.logging.Log;
Import Org.apache.commons.logging.LogFactory;
Import Org.quartz.JobExecutionContext;
Import org.quartz.JobExecutionException;

public class HelloWorld
{
private static Log logger = Logfactory.getlog (HelloWorld. Class); Log Recorder
Public HelloWorld ()
{
}
public void Execute ()
{
Logger.info ("Kick your ass and fuck your -"+ new Date ());
}
}

2. The spring configuration file Applicationcontext.xml is modified as follows:

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-->;? XML version= "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/beans http://www.springframework.org/schema/beans/ Spring-beans-2.0.xsd ">

<!--the work class to invoke-->
< Bean id = "Quartzjob" class = "Com.vista.quartz.HelloWorld" ></bean >
<!--define methods for calling objects and calling objects-->
< Bean id = "Jobtask" class = "Org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean" >
Class--> called by <!--
< property name = "TargetObject" >
< ref bean = "Quartzjob"/>
</Property >
<!--calling methods in a class-->
< property name = "Targetmethod" >
< value > Execute </value >
</Property >
</Bean >
<!--define trigger time-->
< Bean id = "Dotime" class = "Org.springframework.scheduling.quartz.CronTriggerBean" >
< property name = "Jobdetail" >
< ref bean = "Jobtask"/>
</Property >
<!--cron expression-->
< property name = "Cronexpression" >
< value > 10,15,20,25,30,35,40,45,50,55 * * * *? </value >
</Property >
</Bean >
<!--general Management class if the lazy-init= ' false ' then the container starts and executes the scheduler-->
< Bean id = "Startquertz" Lazy-init = "false" Autowire = "no" class = "Org.springframework.scheduling.quartz.SchedulerF Actorybean ">
< property name = "Triggers" >
< list >
< ref bean = "Dotime"/>
</list >
</Property >
</Bean >
</Beans >

3, first in the console to test the above code, all we have to do is load the spring configuration file, the code is as follows:
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--> package Com.vista.quartz;

Import Org.springframework.context.ApplicationContext;
Import Org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test
{
public static void Main (string[] args)
{
System.out.println ("Test start.");
ApplicationContext context = new Classpathxmlapplicationcontext ("Applicationcontext.xml");
If you set the Startquertz Bean's lazy-init to false in the configuration file, do not instantiate
Context.getbean ("Startquertz");
System.out.print ("Test end..");
}
}

4, and then modify the Web.xml as follows so that Tomcat initializes spring at startup:
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-->;? XML version= "1.0" encoding= "UTF-8"?>
< Web-app Version = "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, and finally start Tomcat, the test results are shown in the following illustration: