使用Listener实现Quartz任务调度的范例

转载自：
http://203.208.39.132/search?q=cache:3bY7UNm9RwgJ:jim19770812.blogspot.com/2009/05/listenerquartz.html+spring+quartz+%E5%81%9C%E6%AD%A2%E4%BB%BB%E5%8A%A1&cd=9&hl=zh-CN&ct=clnk&gl=cn&st_usg=ALhdy2-yK86lXbFxGKUryZ9CYsk9d15n6A

先前写过一篇使用Spring实现Quartz任务调度的范例《使用Spring实现Quartz任务调度的范例》

要是工程里不能使用spring的话，这种做法就不合适了，这种情况下可以使用Listener来实现Quartz任务调度。

QuartzServiceListener.java代码如下



package com.demo;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.apache.log4j.Logger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.Trigger;
import org.quartz.TriggerUtils;

public class QuartzServiceListener implements ServletContextListener {
private static Logger log = Logger.getLogger(QuartzServiceListener.class);
private static SchedulerFactory schedulerFactory = new org.quartz.impl.StdSchedulerFactory();
private static Scheduler scheduler;
@Override
public void contextDestroyed(ServletContextEvent event) {
  try {
   scheduler.shutdown();
   log.info("停止调度任务");
  } catch (SchedulerException e) {
   e.printStackTrace();
   log.error(e.getMessage(), e);
  }  
}

@Override
public void contextInitialized(ServletContextEvent event) {
  try{
   scheduler = schedulerFactory.getScheduler();
       JobDetail jobDetail = new JobDetail("name", Scheduler.DEFAULT_GROUP, MyJob.class);
       Trigger trigger = TriggerUtils.makeDailyTrigger("[每日自动分析调度任务]", 18, 07);
       scheduler.scheduleJob(jobDetail, trigger);
       scheduler.start();
       log.info(new StringBuilder("启动调度任务").append(trigger.getNextFireTime()));
  }catch(Exception e){
   e.printStackTrace();
   log.error(e.getMessage(), e);
  }
}
}


MyJob.java代码如下


package com.demo

import org.apache.log4j.Logger;

public class MyJob {
private static Logger log = Logger.getLogger(MyJob.class);
/**
  * 定时执行的任务
  */
public void execute() {
  log.info("准备执行调度");
  try{

  }finally{
   log.info("调度执行完成");
  }
}
}


最后别忘了在web.xml里加入这个QuartzServiceListener
web.xml


  <listener>
    <listener-class>com.gdw.scheduler.QuartzServiceListener</listener-class>
  </listener>