定时timer

  package cn.com.xinli.timer;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

public class MyListener implements ServletContextListener {
 
  private Timer timer = null;

  public void contextInitialized(ServletContextEvent event) {
    timer = new Timer(true);
    //设置任务计划，启动和间隔时间
   
    //调度
    timer.schedule(new MyTaskDb(),   1000*60*60*12,    1000*60*60*24);
    timer.schedule(new MyTaskMail(), 1000*60*60*14, 1000*60*60*24);
   
  }

  public void contextDestroyed(ServletContextEvent event) {
    timer.cancel();
  }
 
}




package cn.com.xinli.timer;

import java.util.Date;
import java.util.TimerTask;
import cn.com.xinli.db.*;
public class MyTaskDb extends TimerTask {

  public void run() {
     System.out.println("------call at " + (new Date())+"-------");
     LoginList.getLoginList();
     LoginByZone.getLoginByZone();
     LoginByTime.getLoginByTime();
    // TODO 此处添加具体任务代码
  }

}




package cn.com.xinli.timer;

import java.util.Date;
import java.util.TimerTask;
import cn.com.xinli.db.*;
import cn.com.xinli.mail.Mail;
public class MyTaskMail extends TimerTask {

  public void run()
  {

  Mail m = new Mail();
  try
  {
      m.sendMail();
      System.out.println("---------邮件发送成功"+new Date()+"-----------");
  }
  catch (Exception e)
  {
    e.printStackTrace();
  }
  }

}



web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

  <listener>
      <listener-class>cn.com.xinli.timer.MyListener</listener-class>
  </listener>

</web-app>