首頁猿問一點(diǎn)擊登錄按鈕就報錯了，代碼如下，...

一點(diǎn)擊登錄按鈕就報錯了，代碼如下，麻煩大神幫忙指導(dǎo)

Java WebApp

慕萊塢8031794 2016-05-15 14:24:50

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%><%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">? </head>??? <body>? ? <div id="container"><div class="logo"><a href="#"><img src="asserts/logo.png" alt="" /></a></div><div id="box"><form action="dologin.jsp" method="post"><p class="main"><label>用戶名: </label><input type="text" name="username" value="" >?<label>密碼: </label><input type="password" name="password" value=""></p><p class="space"><input type="submit" value="登錄" ></p></form></div></div>? </body></html><%@ page language="java" import="java.util.*"contentType="text/html; charset=utf-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";String username=" ";String password=" ";request.setCharacterEncoding("utf-8");//防止中文亂碼username=request.getParameter("username");password=request.getParameter("password");//用戶和密碼都等于admin時，登錄成功if(username.equals("admin")&&password.equals("admin")){session.setAttribute("loginUser", username);request.getRequestDispatcher("login_success.jsp").forward(request, response);}else{response.sendRedirect("login_failure.jsp");}%><%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%><%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">? </head>??? <body>? ? <div id="container"><div class="logo"><a href="#"><img src="asserts/logo.png" alt="" /></a></div><div id="box"><%?? ? String loginUser = "";? ? if(session.getAttribute("loginUser")!=null)? ? {? ? ? ?loginUser = session.getAttribute("loginUser").toString();? ? }?%>? ? 歡迎您<font color="red"><%=loginUser%></font>,登錄成功！</div></div>? </body></html><%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%><%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">? </head>??? <body>? ? <div id="container"><div class="logo"><a href="#"><img src="asserts/logo.png" alt="" /></a></div><div id="box">登錄失敗，請檢查用戶名或密碼。<br><a href="login.jsp">返回</a></div></div>? </body></html>下面是錯誤提示：

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