servletcontextdemo.java

这是用Java写的一个监听器的代码

package cn.mldn.lxh.listener ;

import javax.servlet.* ;

public class ServletContextDemo
	implements ServletContextListener,ServletContextAttributeListener
{
	private ServletContext application = null ;
	// 实现方法
	public void contextInitialized(ServletContextEvent sce)
	{
		this.application = sce.getServletContext() ;
		System.out.println("** 上下文初始化 ...") ;
		System.out.println("** 当前虚拟目录的绝对路径："+this.application.getRealPath("/")) ;
	}
	public void contextDestroyed(ServletContextEvent sce)
	{
		System.out.println("** 上下文销毁 ...") ;
	}

	public void attributeAdded(ServletContextAttributeEvent scab)
	{
		System.out.println("** 增加属性："+scab.getName()+" --> "+scab.getValue()) ;
	}
	public void attributeRemoved(ServletContextAttributeEvent scab)
	{
		System.out.println("** 删除属性："+scab.getName()+" --> "+scab.getValue()) ;
	}
	public void attributeReplaced(ServletContextAttributeEvent scab)
	{
		System.out.println("** 替换属性："+scab.getName()+" --> "+scab.getValue()) ;
	}
};

/*
  <listener>
	<listener-class>cn.mldn.lxh.listener.ServletContextDemo</listener-class>
  </listener>
*/