制作登錄界面,登錄成功后把用戶名放在session里,在第3個頁面讀取session顯示用戶名


<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登錄界面</title>
</head>
<body>
<form action="denglu2.jsp" method="post">
用戶名<input type="text"  name="username"/>
<br>
密碼&nbsp&nbsp&nbsp&nbsp <input type="password" name="password"/>
<br>
<input type="submit" value="登錄"/>
</form>
</body>
</html>
                         <%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>接收界面</title>
</head>
<body>
<%
String un=new String(request.getParameter("username").getBytes("ISO-8859-1"),"UTF-8");
session.setAttribute("zhanghao",un);
String pw=request.getParameter("password");
session.setAttribute("mima", pw);
%>

</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>顯示界面</title>
</head>
<body>
<%
String zh=session.getAttribute("zhanghao").toString();
String mm=session.getAttribute("mima").toString();
%>您的賬號是:
<%out.print(zh); %>
<br>您的密碼是:
<%
out.print(mm);
%>
</body>
</html>


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