项目启动定时任务

package com;

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
     timer.schedule(new MyTask(), 0, 1000);
   }

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






package com;

import java.util.Date;
import java.util.TimerTask;

public class MyTask extends TimerTask {

  public void run() {
    System.out.println("call at " + (new Date()));
  
  }

}




  <listener>
<listener-class>com.MyListener</listener-class>
</listener>