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分享JSP做聊天室程序，调试出错？请高手指点！！！
下面是聊天室初始化程序，但编译不能通过，JSP引擎是weblogic6.1：
<%@page contentType="text/html;charset=gb2312"%>
<%@page import="java.util.*"%>
<html>
<head>
<title>初始化聊天室</title>
</head>
<body>
<%
//init the chat msg
Vector chatMsgVector=new Vector();
chatMsgVector.addElement("<font color='red' size='2'>欢迎来到聊天室!</font><br>");
//the following code are used to init the welcome msg
getServletContext().setAttribute("msg",chatMsgVector);
//init the user list
Vector chat_user=new Vector();
//medet is the opertor
chat_user.addElement("medet");
getServletContext().setAttribute("user_list",chat_user);
%>
</body>
</html>
出现的问题（节选一部分）：
F:\bea\wlserver6.1\config\itcenter\applications\DefaultWebApp\WEB-INF\_tmp_war_lover_lover_DefaultWebApp\jsp_servlet\_chat\__init_chat.java:97: cannot resolve symbol
probably occurred due to an error in /chat/init_chat.jsp line 13:
getServletContext().setAttribute("msg",chatMsgVector);
Full compiler error(s):
F:\bea\wlserver6.1\config\itcenter\applications\DefaultWebApp\WEB-INF\_tmp_war_lover_lover_DefaultWebApp\jsp_servlet\_chat\__init_chat.java:97: cannot resolve symbol
symbol : method getServletContext ()
location: class jsp_servlet._chat.__init_chat
getServletContext().setAttribute("msg",chatMsgVector); //[ /chat/init_chat.jsp; Line: 13]
请问问题出在哪里？谢谢！
<%@page contentType="text/html;charset=gb2312"%>
<%@page import="java.util.*"%>
<html>
<head>
<title>初始化聊天室</title>
</head>
<body>
<%
//init the chat msg
Vector chatMsgVector=new Vector();
chatMsgVector.addElement("<font color='red' size='2'>欢迎来到聊天室!</font><br>");
//the following code are used to init the welcome msg
getServletContext().setAttribute("msg",chatMsgVector);
//init the user list
Vector chat_user=new Vector();
//medet is the opertor
chat_user.addElement("medet");
getServletContext().setAttribute("user_list",chat_user);
%>
</body>
</html>
出现的问题（节选一部分）：
F:\bea\wlserver6.1\config\itcenter\applications\DefaultWebApp\WEB-INF\_tmp_war_lover_lover_DefaultWebApp\jsp_servlet\_chat\__init_chat.java:97: cannot resolve symbol
probably occurred due to an error in /chat/init_chat.jsp line 13:
getServletContext().setAttribute("msg",chatMsgVector);
Full compiler error(s):
F:\bea\wlserver6.1\config\itcenter\applications\DefaultWebApp\WEB-INF\_tmp_war_lover_lover_DefaultWebApp\jsp_servlet\_chat\__init_chat.java:97: cannot resolve symbol
symbol : method getServletContext ()
location: class jsp_servlet._chat.__init_chat
getServletContext().setAttribute("msg",chatMsgVector); //[ /chat/init_chat.jsp; Line: 13]
请问问题出在哪里？谢谢！
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