jsp第5次作业

login.jsp界面：

<%@ 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>Insert title here</title>
</head>
<body>
        <form action="dologin.jsp" method = "post">
            
            姓名：<input type="text" name="uname"/><br/>
            密码：<input type="password" name="upwd"/><br/>
            <input type="submit" value="登录"/><br/>
        </form>
</body>
</html>

dologin.jsp界面：

<%@page import="javax.websocket.Session"%>
<%@page import="java.nio.channels.SeekableByteChannel"%>
<%@ 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>Insert title here</title>
</head>
<body>
        <% 
            request.setCharacterEncoding("utf-8");
            String name =request.getParameter("uname");
            String pwd = request.getParameter("upwd");
            if(name.equals("zs")&&pwd.equals("123")){
                session.setAttribute("uname", name);
                session.setAttribute("upwd", pwd);
                request.getRequestDispatcher("Welcome.jsp").forward(request, response);
            }else{
                response.sendRedirect("login.jsp");
            }
        
        
        %>
</body>
</html>

Welcome.jsp界面：

<%@ 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>Insert title here</title>
</head>
<body>
        欢迎您：
        <%
            String name = (String)session.getAttribute("uname");
            out.print(name);
        %>
</body>
</html>

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原文地址：https://www.cnblogs.com/hyonf/p/14641695.html