為什么跳轉不到login_success.jsp頁面？
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
String username="";
String password="";
request.setCharacterEncoding("UTF-8");
username=request.getParameter("username");
password=request.getParameter("password");
//如果用戶名和密碼都等于admin，則登錄成功；
if("admin".equals(username) && "admin".equals(password))
{
? session.setAttribute("loginUser",username);
? request.getRequestDispatcher("login_success.jsp").forward(request, response);
}else{
? response.sendRedirect("login_failure.jsp");//如果登錄名或密碼錯誤，則登錄失??；
}
%>
2018-12-11
login.jsp頁面的代碼：
<%@ 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>imooc-login</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>
? ?<div id="container">
? ? ? <div class="logo">
? ? ? ? ?<a href="dologin.jsp"><img src="assets/006.jpg" alt="" /></a>
? ? ? </div>
? ? ? <div id="box">
? ? ? ? ?<form action="dologin.jsp" method="post">
? ? ? ? ?<p class="main">
? ? ? ? ? ? ?<label>用戶名:</label>
? ? ? ? ? ? ?<input name="username" value="" />
? ? ? ? ? ? ?<label>密碼：</label>
? ? ? ? ? ? ?<input type="password" name="passsword" />
? ? ? ? ?</p>
? ? ? ? ?<p class="space">
? ? ? ? ? ? <input type="submit" value="登錄" class="login" style=""/>
? ? ? ? ?</p>
? ? ? ? ?</form>
? ? ? </div>
? ?</div>
? </body>
</html>
login_success.jsp
<%@ page language="java" import="java.util.*" pageEncoding="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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
? </head>
??
? <body>
? ?<div id="container">
? ? ? <div class="logo">
? ? ? ? ?<a href="dologin.jsp"><img src="assets/006.jpg" 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>，登陸成功！
? ? ? </div>
? ?</div>
? </body>
</html>
login_failure.jsp
<%@ page language="java" import="java.util.*" pageEncoding="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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
? </head>
??
? <body>
? ?<div id="container">
? ? ? <div class="logo">
? ? ? ? ?<img src="assets/006.jpg" alt="" />
? ? ? </div>
? ? ? <div id="box">
? ? ? ? ?登陸失?。≌垯z查用戶名或密碼！<br/>
? ? ? ? ?<a href="login.jsp">返回登錄</a>
? ? ? </div>
? ?</div>
? </body>
</html>
這些就是所有頁面的代碼了
2018-12-11
你最好吧別的頁面的代碼，也發上來。