QuartZ在Web中的使用

2012-08-09

QuartZ在Web中的应用1.下载Quartz，我下载的是1.8.5，将quartz-all-1.8.5拷贝到web项目的lib目录中。除此之外

QuartZ在Web中的应用

1.下载Quartz，我下载的是1.8.5，将quartz-all-1.8.5拷贝到web项目的lib目录中。除此之外还需要将以下

拷贝到web项目的lib目录中，不然会启动tomcat会产生如下错误：

#缺少log4j-1.2.14,slf4j-api-1.6.1,slf4j-log4j12-1.6.1java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory#缺少jta-1.1javax/transaction/UserTransaction at java.lang.Class.getDeclaredMethods0(Native Method)

2.新建一个任务类,需要实现Quartz的Job接口。

package me.hujun.demo.quartz;import java.util.Date;import org.quartz.Job;import org.quartz.JobExecutionContext;import org.quartz.JobExecutionException;public class MyJob implements Job {        @Override        public void execute(JobExecutionContext arg0) throws JobExecutionException {                System.out.println("Start MyJob at " + new Date());        }}

3.在src目录下新建quartz.properties,这个文件可以直接充quartz的jar包中拷贝。但需要加入两行新的内容,分别用来指定jobInitializer class和jobInitializer需要解析的配置文件路径（清单的最后两行配置）。

#============================================================================  # Configure Main Scheduler Properties    #============================================================================  org.quartz.scheduler.instanceName = TestScheduler  org.quartz.scheduler.instanceId = AUTO  #============================================================================  # Configure ThreadPool    #============================================================================  org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool  org.quartz.threadPool.threadCount = 3  org.quartz.threadPool.threadPriority = 5  #============================================================================  # Configure JobStore    #============================================================================  #org.quartz.jobStore.misfireThreshold = 60000  org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore  #============================================================================  # Configure Plugins   #============================================================================  #org.quartz.plugin.triggHistory.class = org.quartz.plugins.history.LoggingJobHistoryPlugin  #org.quartz.plugin.jobInitializer.class = org.quartz.plugins.xml.JobInitializationPlugin  #org.quartz.plugin.jobInitializer.fileNames = quartz_jobx.xml  #org.quartz.plugin.jobInitializer.overWriteExistingJobs = true  #org.quartz.plugin.jobInitializer.failOnFileNotFound = true  #org.quartz.plugin.jobInitializer.scanInterval = 10  #org.quartz.plugin.jobInitializer.wrapInUserTransaction =false    #org.quartz.plugin.jobInitializer.class = org.quartz.plugins.xml.JobInitializationPlugin  org.quartz.plugin.jobInitializer.class = org.quartz.plugins.xml.XMLSchedulingDataProcessorPlugin  #如果这里不指定，默认会读取WEB-INFO/CLASSES目录下的quartz_jobs.xml文件，名称不能改变  #如果有多个job xml文件，使用","隔开  org.quartz.plugin.jobInitializer.fileNames = quartz_jobs.xml  org.quartz.plugin.jobInitializer.failOnFileNotFound = true  org.quartz.plugin.shutdownhook.class = org.quartz.plugins.management.ShutdownHookPlugin  org.quartz.plugin.shutdownhook.cleanShutdown =true

4.编写quartz_job.xml（上述清单中org.quartz.plugin.jobInitializer.fileNames的值），配置job和trigger。<?xml version="1.0" encoding="UTF-8"?>
<job-scheduling-data xmlns="http://www.quartz-scheduler.org/xml/JobSchedulingData"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.quartz-scheduler.org/xml/JobSchedulingData http://www.quartz-scheduler.org/xml/job_scheduling_data_1_8.xsd"
version="1.8">
<schedule>
<job>
<name>my_job</name>
<group>DEFAULT</group>
<description>
this is HelloWorld......
</description>
<job-class>org.hzy.jobs.My_Job</job-class>
</job>
<trigger>
<cron>
<name>my_job_trigger</name>
<job-name>my_job</job-name>
<cron-expression>0/10 * * * * ?</cron-expression>
</cron>
</trigger>
</schedule>
</job-scheduling-data>
5.修改web.xml。

<servlet>                <servlet-name>quartz</servlet-name>                <servlet-class>org.quartz.ee.servlet.QuartzInitializerServlet</servlet-class>                <init-param>                        <param-name>config-file</param-name>                        <param-value>/quartz.properties</param-value>                </init-param>                <init-param>                        <param-name>shutdown-on-unload</param-name>                        <param-value>true</param-value>                </init-param>

<load-on-startup>1</load-on-startup>        </servlet>

或启用监听器QuartzInitializerListener

 <context-param>         <param-name>config-file</param-name>         <param-value>/some/path/my_quartz.properties</param-value>     </context-param>     <context-param>         <param-name>shutdown-on-unload</param-name>         <param-value>true</param-value>     </context-param>     <context-param>         <param-name>start-scheduler-on-load</param-name>         <param-value>true</param-value>     </context-param>          <listener>         <listener-class>             org.quartz.ee.servlet.QuartzInitializerListener         </listener-class>     </listener>

6.启动tomcat

热点排行

Web前端

QuartZ在Web中的使用