Tomcat中設置監聽類定時執行程序

首先建立一個監聽類：
 

    import   java.util.Timer;
     import   javax.servlet.ServletContextEvent;
     import   javax.servlet.ServletContextListener;


 public   class   TestListener   implements   ServletContextListener   {

          private   Timer   timer   =   null;

           public   void   contextInitialized(ServletContextEvent   event)   {
                  timer   =   new   Timer(true);
                  timer.schedule(new   TestTimer(),   0,   2000);//milliseconds
           }

           public   void   contextDestroyed(ServletContextEvent   event)   {

                  timer.cancel();
           }
   }
        </pre> 


 新建一個任務類 
  
   
  
 
  
      import   java.util.TimerTask;
       public   class   TestTimer   extends   TimerTask   {


         public   void   run()   {
                System.out.println("ssss");
         }
   }</pre> 


 配置xml信息 
  
 
  
        <listener>
            <listener-class> test.TestListener </listener-class>
        </listener>