Java web 定时任务开发 Quartz

<servlet>
<servlet-name>bakmysql</servlet-name>
<servlet-class>com.ext.portlet.util.BakDbServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>

package com.ext.portlet.util;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;

import org.quartz.CronExpression;
import org.quartz.CronTrigger;
import org.quartz.Job;
import org.quartz.JobDetail;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.impl.StdSchedulerFactory;

import com.ext.portlet.baoxiao.job.BaoXiaoJob;

public class BakDbServlet extends HttpServlet{

@Override
public void init(ServletConfig config) throws ServletException {
super.init(config);

org.quartz.Scheduler scheduler = null;
SchedulerFactory schedulerFactory = new StdSchedulerFactory();
try {
scheduler = schedulerFactory.getScheduler();
Job job = new BaoXiaoJob();
JobDetail jobDetail = new JobDetail(
job.getClass().getName(), "DEFAULT",
job.getClass());
CronTrigger cronTrigger = new CronTrigger("cronTrigger100", "triggerGroup100");
try {
//CronExpression(秒,分,小时,日期,月份,星期,年[可选])
CronExpression cexp = new CronExpression("0 * * * * ?");
cronTrigger.setCronExpression(cexp);
} catch (Exception e) {
e.printStackTrace();
}
scheduler.scheduleJob(jobDetail, cronTrigger);
scheduler.start();
} catch (SchedulerException e1) {
e1.printStackTrace();
}

}
}

package com.ext.portlet.baoxiao.job;

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

public class BaoXiaoJob implements Job{

public void execute(JobExecutionContext arg0) throws JobExecutionException {
// 报销job
System.out.println("报销job");
}

}