首页手记 Java遇见HTML---JSP篇（阶段项目-实现用户登录）

Java遇见HTML---JSP篇（阶段项目-实现用户登录）

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Java

登录页面

<%--
Created by IntelliJ IDEA.
User: hp
Date: 2016/11/29
Time: 18:38
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" errorPage="login-failure.jsp" %>
<html>
<head>
<title>登录</title>
</head>
<body>
<div>
<form method="post" action="dologin.jsp">
用户名：<input type="text" id="username" name="username"><br>
密码：<input type="password" id="pwd" name="pwd"><br>
<input type="submit" value="登录">
</form>
</div>
</body>
</html>

- 逻辑处理页面

<%--
Created by IntelliJ IDEA.
User: hp
Date: 2016/11/29
Time: 18:56
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
String username = request.getParameter("username");
String pwd = request.getParameter("pwd");
if (username.equals("admin")&&pwd.equals("admin")){
session.setAttribute("username", username);
session.setAttribute("pwd", pwd);
request.getRequestDispatcher("login-success.jsp").forward(request,response);
}else {
response.sendRedirect("login-failure.jsp");
}
%>

- 登录成功页面

<%@ page import="java.util.Enumeration" %><%--
Created by IntelliJ IDEA.
User: hp
Date: 2016/11/29
Time: 18:43
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>登陆成功</h1>
<%
String username = "";
String pwd = "";
if (session.getAttribute("username") != null){
username=session.getAttribute("username").toString();
}
if (session.getAttribute("pwd")!=null){
pwd = session.getAttribute("pwd").toString();
}
%>
用户名：<%=username%>
密码：<%=pwd%>
</body>
</html>


- 登录失败页面

<%--
Created by IntelliJ IDEA.
User: hp
Date: 2016/11/29
Time: 18:44
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isErrorPage="true" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>密码错误</h1>
<a href="login.jsp">返回登录</a>
</body>
</html>