Login.jsp文件：
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<!doctype html>
<html>
<head>
<!--声明当前页面的编码集：charset=gbk,gb2312(中文编码)，utf-8国际编码-->
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<!--当前页面的三要素-->
<title>多人聊天室 - 登录</title>
<meta name="Keywords" content="关键词,关键词">
<meta name="description" content="">
<!--css,js-->
<style type="text/css">
*{margin:0;padding:0;}
.text{width:200px;height:26px;line-height:26px;}
</style>
</head>
<body>
<h1>聊天室 - 登录</h1>
<form action="loadMes.jsp?action=login" method="post">
用户名：<input type="text" name="username" class="text"/> <br />
密 码：<input type="password" name="password" class="text"/><br /><br />
<input type="submit" value="登 录"/>
</form>
</body>
</html>
////////////////////////////////////////////////////////////
loadMes.jsp文件里：
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<jsp:useBean id="msgs" class="java.util.HashMap" scope="application"/>
<%
request.setCharacterEncoding("gbk");
String action = request.getParameter("action");
// 登录页面
if("login".equals(action)){
String username = request.getParameter("username");
String password = request.getParameter("password");
// 存储username到session对象里边
session.setAttribute("username", username);
String msg = "欢迎<span style='color:red;font-size:16px;font-weight:bold;'>" + username + "</span> 加入聊天室！ <br /><br />";
//System.out.println("开始："+msg);
msgs.put(username,msg);
response.sendRedirect("main.jsp");
}
// 消息展示页面
if("show".equals(action)){
// 展示聊天记录
String username = (String)session.getAttribute("username");
String msg = (String)msgs.get(username);
//System.out.println("展示聊天记录："+msg);
out.println("loadData.innerHTML=\""+msg+"\";");
}
// 消息输入
if("write".equals(action)){
String newMsg = request.getParameter("msg");
String userMsg = session.getAttribute("username") + " : " + newMsg;
System.out.println("发送新消息："+userMsg);
// 发送消息时，将所有的聊天室里边聊天记录进行叠加
Iterator it = msgs.keySet().iterator();
String username = null;
String msg = null;
while(it.hasNext()){
username = (String)it.next(); // 用户名
msg = (String)msgs.get(username); // 获取全局变量中的消息
msg = msg +"<br /><br />"+ userMsg;
msgs.put(username, msg);
}
response.sendRedirect("writerMes.jsp");
}
%>
/////////////////////////////////////////////////////////////////////
main.jsp文件：
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<!doctype html>
<html>
<head>
<!--声明当前页面的编码集：charset=gbk,gb2312(中文编码)，utf-8国际编码-->
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<!--当前页面的三要素-->
<title>多人聊天室 - 聊天室主窗体</title>
<meta name="Keywords" content="关键词,关键词">
<meta name="description" content="">
<!--css,js-->
<style type="text/css">
*{margin:0;padding:0;}
</style>
</head>
<frameset rows="*,100" border="0" >
<frame src="show.jsp"></frame>
<frame src="writerMes.jsp"></frame>
</frameset>
</html>
//////////////////////////////////////////////////////////////////
show.jsp文件里：
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<!doctype html>
<html>
<head>
<!--声明当前页面的编码集：charset=gbk,gb2312(中文编码)，utf-8国际编码-->
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<!--当前页面的三要素-->
<title>多人聊天室 - 消息展示页面</title>
<meta name="Keywords" content="关键词,关键词">
<meta name="description" content="">
<meta http-equiv="refresh" content="1"/>
<!--css,js-->
<style type="text/css">
*{margin:0;padding:0;}
body{background:#CC9999;}
</style>
<script type="text/javascript">
function LoadMsg(){
var url = "loadMes.jsp?action=show";
loadTime.src = url;
}
</script>
<script type="text/javascript" id="loadTime"></script>
</head>
<body onLoad="javascript:LoadMsg();">
<span id="loadData">正在加载数据，请稍后喔 ..........</span>
</body>
</html>
///////////////////////////////////////////////////////////////////
writeMesjsp文件里：
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<!doctype html>
<html>
<head>
<!--声明当前页面的编码集：charset=gbk,gb2312(中文编码)，utf-8国际编码-->
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<!--当前页面的三要素-->
<title>多人聊天室 - 消息的输入页面</title>
<meta name="Keywords" content="关键词,关键词">
<meta name="description" content="">
<!--css,js-->
<style type="text/css">
*{margin:0;padding:0;}
body{background:#CC99FF;}
.msg{height:26px;line-height:26px;}
.sub{width:100px;height:30px;}
</style>
</head>
<body>
<form action="loadMes.jsp?action=write" method="post">
<%=session.getAttribute("username") %>：<input type="text" name="msg" size="60" class="msg" autofocus x-webkit-speech/>
<input type="submit" value="发 送" class="sub"/>
</form>
</body>
</html>
///////////////////////////////////////////////////////////////////
index.jsp文件里：
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
This is my JSP page. <br>
</body>
</html>
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