<table border=1 align="center"> <tr bgcolor="#F9AD00"> <th>Info Type</th><th>Value</th> </tr> <tr> <td>Your Accesses</td> <td><%=accessCount%></td> </tr> <tr> <td>Total Accesses</td> <td><%=totalAccessCount%></td> </tr> </table> </body></html>这个是Application的应用，显示结果为： Welcome,this is your First Visit Access Counts Info Type Value Your Accesses 1 Total Accesses 1 你自己看看吧
我也要一份 [email protected]
http://www.amazingcounters.com/=================================================================
角落里的理想
http://blog.csdn.net/zdsdiablo/
--------十分钟年华老去
=================================================================
* 编写以下SessionCounter.java
* 并编译为SessiionCounter.class
* 然后放到你的网站的classpath的
* SessionCount(自己建立此目录)下面
*/package SessionCount;
import javax.servlet.*;
import javax.servlet.http.*;public class SessionCounter implements HttpSessionListener {private static int activeSessions = 0;public void sessionCreated(HttpSessionEvent se) {
activeSessions++;
}public void sessionDestroyed(HttpSessionEvent se) {
if(activeSessions > 0)
activeSessions--;
}public static int getActiveSessions() {
return activeSessions;
}
}接着建立online.jsp文件用于显示在线人数
<%@ page import="SessionCount.SessionCounter" %>
在线：<%= SessionCounter.getActiveSessions() %>然后需要在你的网站的WEB-INF中建立web.xml
文件内容如下：
<!-- Web.xml -->
<?xml version="1.0" encoding="ISO-8859-1"?><!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/j2ee/dtds/web-app_2.3.dtd"><web-app><!-- Listeners -->
<listener>
<listener-class>
SessionCount.SessionCounter
</listener-class>
</listener></web-app>
<!--ShowApplication.jsp-->
<%@page import="java.util.*"%>
<html>
<head><title>Application Object Example</title></head>
<body bgcolor="white">
<%
Integer accessCount=(Integer)session.getAttribute("accessCount");
String heading=null;
if (accessCount==null){
accessCount=new Integer(1);
heading="Welcome,this is your First Visit";
}else{
accessCount=new Integer(accessCount.intValue()+1);
heading="Welcome,this is your Visit #"+accessCount;
}
session.setAttribute("accessCount",accessCount);
Integer totalAccessCount=(Integer)application.getAttribute("totalAccessCount");
if(totalAccessCount==null){
totalAccessCount=new Integer(1);
}else{
totalAccessCount=new Integer(totalAccessCount.intValue()+1);
}
application.setAttribute("totalAccessCount",totalAccessCount);
%> <h1 align=center><%=heading%></h1>
<h2 align=center>Access Counts</h2>
<table border=1 align="center">
<tr bgcolor="#F9AD00">
<th>Info Type</th><th>Value</th>
</tr>
<tr>
<td>Your Accesses</td>
<td><%=accessCount%></td>
</tr>
<tr>
<td>Total Accesses</td>
<td><%=totalAccessCount%></td>
</tr>
</table>
</body></html>这个是Application的应用，显示结果为：
Welcome,this is your First Visit
Access Counts
Info Type Value
Your Accesses 1
Total Accesses 1 你自己看看吧