配制监听器

 1、配制web.xml

<!-- 监听器 ******************************************************************************* -->
<listener>
	<listener-class>com.test.InitNews</listener-class>
</listener>
<!-- 监听器结束 ============================================================================ -->

 

2、创建监听类InitNews

package com.test;

import java.util.Timer;

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

public class InitNews implements ServletContextListener {

	
	public void contextDestroyed(ServletContextEvent sce) {
		// TODO Auto-generated method stub
		
	}

	public void contextInitialized(ServletContextEvent sce) {

		Timer timer = new Timer();
		
		timer.schedule(new News(sce), 1000,1*1000);		
	}

}

 

 3、具体功能类

package com.test;

import java.util.TimerTask;

import javax.servlet.ServletContextEvent;

public class News extends TimerTask {
	
	private ServletContextEvent sce;
	
	public News(ServletContextEvent sce)
	{
		this.sce = sce;
	}
	
	public void run()
	{
		System.out.println("监听器，每隔一秒钟显示一次！！");
	}

}