jsp聊天程序

w_j123 2009-03-23 03:32:52

我是刚学jsp的老师让用jsp做一个简单的聊天程序请高手给点指点谢谢喽

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w_j123 2009-03-23

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非常感谢啊应该可以用自动刷新吧像refresh应该可以自动刷新的 O(∩_∩)O哈哈~

hoojo 2009-03-23

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main.jsp

<frameset rows="85%,*">

	

	

	<frameset cols="80%,*">		

			

			

			<frame src="message.jsp" name="message" />			

		

			<frame src="userList.jsp" name="userList">		

		

		

	</frameset>

	

	<frame src="sendMessage.jsp" name="sendMessage" />

	

</frameset>

<noframes></noframes>



message.jsp

<%

	request.setCharacterEncoding("gbk");

	List messageList = (List) application.getAttribute("messageList");

	String message = request.getParameter("message");

	Users user = (Users) session.getAttribute("user");



	if (messageList == null || messageList.size() == 0) {

		messageList = new ArrayList();

		application.setAttribute("messageList",messageList);

	}

	if (message != null && !"".equals(message)) {

		messageList.add("<img src='../image/iboy.gif' /> <font color='blue'>"+user.getUserName() + " <b>说：</b></font><br />         "

		+ message);

	}

%>

<table width="100%" border="0" align="left" cellpadding="0"

	cellspacing="0">

	

	<%

			for (int i = 0; i < messageList.size(); i++) {

			String userName = (String) messageList.get(i);

			

	%>





	<tr align="left">

		<td height="20" class="p16"><%=userName%></td>

	</tr>

	

	<%

		

		}

	%>

</table>



registerManage.jsp

<%

	String userName = request.getParameter("userName");

	String password = request.getParameter("password");

	String param = request.getParameter("param");//获取param参数，用以判断用户操作是注册还是登录



	UserDao userDao = new UserDao();

	//判断用户输入信息是否为空

	if (param == null || userName == null || password == null) {

		response.sendRedirect("register.jsp");

	} else if (param != null && "login".equals(param)) {  //登录操作

		//根据用户名和密码查询数据库

		Users user = userDao.findUsers(userName, password);

		if (user != null) {		//判断当前用户是否存在	

			//如果用户存在，把当前用户名保存到application中的List集合内

			List userList = (List) application.getAttribute("users");

			if (userList == null || userList.size() == 0) {  //针对第一个登录用户的操作

				userList = new ArrayList();

				userList.add(userName);

			} else {   //针对其他用户的操作

				boolean bool = true;

				for (int i = 0; i < userList.size(); i++) {

		

					if (userName.equals(userList.get(i).toString())) {

						bool = false;

						break;

					}

				}

				if (bool)

					userList.add(userName);

			}

			//把当前用户的信息保存到session中

			session.setAttribute("user", user);

			application.setAttribute("users", userList);

			response.sendRedirect("main.jsp");

		} else{   //如果用户不存在，给出提示后，返回到网站首页

			//response.sendRedirect("register.jsp");

			out

			.print("<script type='text/javascript'>alert('用户名或密码错误，请重新登录。');location.replace('index.jsp');</script>");

		}

	} else {  //注册操作

		int count = userDao.insertUser(userName, password,0);

		if (count > 0) {

			out

			.print("<script type='text/javascript'>alert('注册成功，请登录。');location.replace('index.jsp');</script>");

		} else {

			out

			.print("<script type='text/javascript'>alert('注册失败，请重新注册。');history.go(-1);</script>");

		}

	}

%>



sendManage.jsp

<script type="text/javascript">

		function checkSend(){		

			if(document.send.msg.value==""){

				alert("不能发送空信息。");

				return false;

			}else{

				document.send.message.value=document.send.msg.value;

				document.send.msg.value="";

				return true;

			}

			 

		}

	</script>

  </head>

  

  <body>

  <form action="message.jsp" method="post" name="send" onSubmit="return checkSend()" target="message">

  <input type="hidden" name="message" value="" />

  <p align="center">

  	请输入发送信息：

   	<input type="text" name="msg" size="30" />      

   	<input type="submit" value="发送" />

   	</p>

   	</form>

  </body>



userList.jsp

<%

	

	List userList = (List) application.getAttribute("users");

	// Users user=(Users) session.getAttribute("users");

%>



<html>

<head>



<title>message</title>



<meta http-equiv="pragma" content="no-cache">

<meta http-equiv="cache-control" content="no-cache">

<meta http-equiv="refresh" content="3">

<link rel="stylesheet" type="text/css" href="styles.css">

</head>



<body onload="scroll(0,9999)">

<table width="100%" border="0" align="left" cellpadding="0"

	cellspacing="0" bordercolor="#EBEBEB">

	<%

			for (int i = 0; i < userList.size(); i++) {

			String userName = (String) userList.get(i);

			

	%>





	<tr align="left">

		<td height="20"class="p16"><img src="../image/iboy.gif" /> <%=userName%></td>

	</tr>	

	<%		

		}

	%>

</table>