quartz调度框架在web中应用实例

quartz调度框架在web中应用实例

1. 在web.xml中配置 初始化quartz 相关servlet

<?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">
 
      <servlet>
            <servlet-name>QuartzInitializer</servlet-name>
            <display-name>Quartz Initializer Servlet</display-name>
            <servlet-class>org.quartz.ee.servlet.QuartzInitializerServlet</servlet-class>
            <load-on-startup>1</load-on-startup>
            <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>
            <init-param>
                <param-name>start-scheduler-on-load</param-name>
                <param-value>true</param-value>
            </init-param>
        </servlet> 
 
 
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

注意：其中配置参数为 /quartz.properties文件

2. 在 quartz.properties 中配置相关参数

如下

org.quartz.scheduler.instanceName = PushDBScheduler
org.quartz.scheduler.instanceId = one
org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount = 4
org.quartz.threadPool.threadPriority = 4  
org.quartz.plugin.jobInitializer.class = org.quartz.plugins.xml.JobInitializationPlugin
org.quartz.plugin.jobInitializer.fileName = quartz_job.xml

注意：org.quartz.plugin.jobInitializer.fileName=quartz_job.xml

3. 在quartz_job.xml中配置调度任务相关内容

<?xml version="1.0" encoding="UTF-8"?>
<quartz xmlns="http://www.quartzscheduler.org/ns/quartz"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.quartzscheduler.org/ns/quartz http://www.quartzscheduler.org/ns/quartz/job_scheduling_data_1_1.xsd"
 version="1.1">
<job>
<job-detail>
 <name>ScanItemsInDB</name>
 <group>Scanning</group>
 <job-class>com.artron.base.task.ScanDB</job-class>
  <job-data-map allows-transient-data="true">
  <entry>
   <key>testmode</key>
   <value>true</value>
  </entry> 
  </job-data-map> 
 </job-detail>
 <trigger>
 <cron>
<name>t1</name>   
<group> Scanning </group>  
<job-name>ScanItemsInDB</job-name>  
<job-group>Scanning</job-group>                   
<cron-expression>0/3 * * * * ?</cron-expression>  
</cron>
</trigger> 
</job>

<job>
<job-detail>
 <name>Mail</name>
 <group>MailScanning</group>
 <job-class>com.artron.base.task.MailJob</job-class>
  <job-data-map allows-transient-data="true">
  <entry>
   <key>ttt</key>
   <value>true</value>
  </entry> 
  </job-data-map> 
 </job-detail>
 <trigger>
 <cron>
<name>Mailt1</name>   
<group>MailScanning</group>  
<job-name>Mail</job-name>  
<job-group>MailScanning</job-group>                   
<cron-expression>0/3 * * * * ?</cron-expression>  
</cron>
</trigger> 
</job>

</quartz>

可以配置多个任务类。重复job节点即可

4. 编写 需要调度的任务类：

这里配置了两个类：

package com.artron.base.task;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class ScanDB implements Job {

 public ScanDB() {
 }

 public void execute(JobExecutionContext context)
   throws JobExecutionException {

  System.out.println("time:" + System.currentTimeMillis());

 }

}

 

package com.artron.base.task;

import java.util.Hashtable;
import java.util.Vector;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

import com.artron.base.db.DBBean;
import com.artron.base.log.LogException;
import com.artron.base.log.LogWriter;

public class MailJob implements Job {

 public MailJob() {
 }

 public void execute(JobExecutionContext context)
   throws JobExecutionException {
  
  System.out.println("time:"+System.currentTimeMillis());
  DBBean dbbean=new DBBean();
  
  String select_sql="select id from  t_yh where state=0 and rownum<20";

  try {
   Vector ids=dbbean.execute(select_sql);

   for (int i=0;i<ids.size();i++)
   {
    Hashtable h=(Hashtable)ids.elementAt(i);
    String id=(String)h.get("ID");
    String sql="update t_yh set state=1 where id="+id;
    dbbean.executeSql(sql);
    System.out.println("处理内容id:"+id);
   }
   
   if (ids.size()==0)
   {
    System.out.println("暂无任务内容");
   }
   
  } catch (Exception e1) {
   // TODO Auto-generated catch block
   e1.printStackTrace();
  }

 }
}

注意：lib包括quartz-1.6.6.jar ，common相关包，jta.jar包等。

然后启动tomcat就可以看到执行效果了。

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<?xml version='1.0' encoding='utf-8'?>
<quartz xmlns="http://www.quartzscheduler.org/ns/quartz"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.quartzscheduler.org/ns/quartz http://www.quartzscheduler.org/ns/quartz/job_scheduling_data_1_1.xsd"
 version="1.1">
 <job>
  <job-detail>
   <name>CollectJob</name>
   <group>CollectJobs</group>
   <job-class>com.xxx.CollectJob</job-class>
   <volatility>false</volatility>
   <durability>false</durability>
   <recover>false</recover>
  </job-detail>
  <trigger>
   <simple>
    <name>CollectTrigger</name>
    <group>DEFAULT</group>
    <job-name>CollectJob</job-name>
    <job-group>DEFAULT</job-group>
    <start-time>2008-11-30T10:00:00 AM</start-time>
    <!-- repeat indefinitely every day -->
    <repeat-count>-1</repeat-count>
    <repeat-interval>7200000</repeat-interval>
   </simple>
  </trigger>
 </job>
</quartz>