请高手指教 jsp登录问题
程序代码：Login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
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>
</head>
<body>
<form action="Loginaction.jsp" method="post">
用户名：<input type="text" name="username"><br>
密码：<input type="password" name="pwd"><br>
教师：<input type="radio" name="flag" value="manager">
学生：<input type="radio" name="flag" value="user"><br>
<input type="submit" value="提交">
</form>
<a href="Register.jsp">注册</a>
</body>
</html>
Loginaction.jsp
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%@ page import="java.sql.*" %>
<%@ page import="DB.UtilDb" %>
<%@ page import="beans.User"%>
<%@ page import="DAO.isLogin"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%
String username=request.getParameter("username");
String pwd=request.getParameter("pwd");
String Loginflag=request.getParameter("flag");
System.out.print(Loginflag);
if((!Loginflag.equalsIgnoreCase("user"))&&(!Loginflag.equalsIgnoreCase("manager")))
{
out.print("请选择登录对象");
out.println("<meta http-equiv='refresh' content='2;url=Login.jsp'> ");
}
User use=new User();
use.setUsername(username);
use.setPwd(pwd);
if(isLogin.Login(use,Loginflag))
{
session.setAttribute("admin",Loginflag);
out.print("登录成功");
out.println("<meta http-equiv='refresh' content='2;url=Main.jsp'> ");
}
else
{
out.print("用户名或者密码错误");
out.println("<meta http-equiv='refresh' content='2;url=Login.jsp'> ");
}
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Loginaction.jsp</title>
</head>
<body>
<br>
</body>
</html>
loginaction 老是提示错误 if((!Loginflag.equalsIgnoreCase("user"))&&(!Loginflag.equalsIgnoreCase("manager")))请高手指教
