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使用JSP实现简单的用户登录注册页面示例代码解析

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

实验要求：

将实验2中的系统用户登录和注册页面改为JSP页面，并部署自己的Web应用于Tomcat服务器中

具体要求：

完成登录JSP页面设计和注册页面设计

在登录页面表单中使用request对象获取用户信息，建立新的JSP页面完成登录验证（用户名和密码自己指定即可）。

验证结果显示（如登录成功/用户名密码错误，可以使用JavaScript，也可以使用新的JSP页面）。

在注册页面表单中使用request对象获取用户注册信息（注册项目由自己指定），在新的JSP页面显示用户注册信息，并提示注册成功。

代码

登录页面index.html

<!DOCTYPE html>
<html lang="zh-CN">
<head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>jsp作业</title>
 <link href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="stylesheet">
</head>
<body>
<nav class="navbar navbar-default">
 <div class="container-fluid">
  <div class="navbar-header">
   <a class="navbar-brand" href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</a>
  </div>
  <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
   <ul class="nav navbar-nav navbar-right">
    <li><a href="login.jsp" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >登录</a></li>
   </ul>
  </div>
 </div>
</nav>
<div class="container">
 <div class="jumbotron">
  <h1>Hello, world!</h1>
  <p>这是一个jsp作业</p>
 </div>
</div>
</body>
</html>

登录页面login.jsp

<%@ page contentType="text/html; charset=utf-8" language="java"%>
<html lang="zh-CN">
<head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>登录</title>
 <link href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="stylesheet">
</head>
<body>
<nav class="navbar navbar-default">
 <div class="container-fluid">
  <div class="navbar-header">
   <a class="navbar-brand" href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</a>
  </div>
  <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
   <ul class="nav navbar-nav navbar-right">
    <li><a href="login.jsp" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >登录</a></li>
   </ul>
  </div>
 </div>
</nav>
<div class="container">
 <div class="row">
  <div class="col-md-4">

  </div>
  <div class="col-md-4">
   <form class="form-signin" method="post" action="login-check.jsp">
    <h2 class="form-signin-heading">登录到jsp作业</h2>
    <label for="">用户名</label>
    <input type="text" name="username" id="username" class="form-control" placeholder="请输入用户名" required autofocus><br>
    <label for="">密码</label>
    <input type="password" name="password" id="password" class="form-control" placeholder="请输入密码" required>
    <div class="checkbox">
     <label>
      <input type="checkbox" value="remember-me" checked="checked"> 记住密码
     </label>
    </div>
    <button type="submit" class="btn btn-primary" id="btn-login">登录</button>
    <a href="reg.jsp" rel="external nofollow" rel="external nofollow" class="btn btn-default">注册</a>
   </form>
  </div>
  <div class="col-md-4">
  </div>
 </div>
</body>
</html>

登录结果页面login-check.jsp

<%@ page contentType="text/html; charset=utf-8" language="java"%>
<html lang="zh-CN">
<head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>登录</title>
 <link href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="stylesheet">
</head>
<body>
<nav class="navbar navbar-default">
 <div class="container-fluid">
  <div class="navbar-header">
   <a class="navbar-brand" href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</a>
  </div>
  <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
   <ul class="nav navbar-nav navbar-right">
    <li><a href="login.jsp" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >登录</a></li>
   </ul>
  </div>
 </div>
</nav>
<div class="container">
 <div class="row">
  <div class="col-md-4">

  </div>
  <div class="col-md-4">
   <form class="form-signin" method="post" action="login-check.jsp">
    <h2 class="form-signin-heading">登录到jsp作业</h2>
    <label for="">用户名</label>
    <input type="text" name="username" id="username" class="form-control" placeholder="请输入用户名" required autofocus><br>
    <label for="">密码</label>
    <input type="password" name="password" id="password" class="form-control" placeholder="请输入密码" required>
    <div class="checkbox">
     <label>
      <input type="checkbox" value="remember-me" checked="checked"> 记住密码
     </label>
    </div>
    <button type="submit" class="btn btn-primary" id="btn-login">登录</button>
    <a href="reg.jsp" rel="external nofollow" rel="external nofollow" class="btn btn-default">注册</a>
   </form>
  </div>
  <div class="col-md-4">
  </div>
 </div>
</body>
</html>

注册页面reg.jsp

<%@ page contentType="text/html; charset=utf-8" language="java"%>
<html lang="zh-CN">
<head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>注册</title>
 <link href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="stylesheet">
</head>
<body>
<nav class="navbar navbar-default">
 <div class="container-fluid">
  <div class="navbar-header">
   <a class="navbar-brand" href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</a>
  </div>
  <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
   <ul class="nav navbar-nav navbar-right">
    <li><a href="login.jsp" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >登录</a></li>
   </ul>
  </div>
 </div>
</nav>
<div class="container">
 <div class="row">
  <div class="col-md-4">
  </div>
  <div class="col-md-4">

   <form class="form-signin" action="reg-submit.jsp" method="post">
    <h2 class="form-signin-heading">注册到jsp作业</h2>
    <div id="info">

    </div>
    <label for="">用户名</label>
    <input type="text" name="username" id="username" class="form-control" placeholder="请输入用户名" required autofocus><br>
    <label for="">密码</label>
    <input type="password" name="password" id="password" class="form-control" placeholder="请输入密码" required><br>
    <label for="">重复密码</label>
    <input type="password" name="password2" id="password2" class="form-control" placeholder="请再次输入密码" required maxLength="16"><br>
    <button type="submit" class="btn btn-primary" id="btn-reg">注册</button>
    <a href="login.jsp" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="btn btn-default" id="btn-reg">返回登录</a>
   </form>
  </div>
  <div class="col-md-4">
  </div>
 </div>
</body>
</html>

注册结果页面reg-submit.jsp

<%@ page contentType="text/html; charset=utf-8" language="java"%>
<html lang="zh-CN">
<head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>结果</title>
 <link href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="stylesheet">
</head>
<body>
<nav class="navbar navbar-default">
 <div class="container-fluid">
  <div class="navbar-header">
   <a class="navbar-brand" href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</a>
  </div>
  <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
   <ul class="nav navbar-nav navbar-right">
    <li><a href="login.jsp" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >登录</a></li>
   </ul>
  </div>
 </div>
</nav>
<div class="container">
 <% String username = request.getParameter("username");
 String password = request.getParameter("password"); 
 String password2 = request.getParameter("password2"); 
 %>
 <%
 if(password.equals(password2)){
  out.println("<div class='alert alert-success' role='alert'>注册成功</div>");
  out.println("<ul class='list-group'>");
  out.println("<li class='list-group-item'>用户名：" + username + "</li>");
  out.println("<li class='list-group-item'>密码：" + password + "</li>");
  out.println("</ul>");
 }
 else{
  out.println("<div class='alert alert-danger' role='alert'>两次密码输入不一致，请重新输入</div>");
 }
 %>
 <!-- <%=username %>
 <%=password %>
 <%=password2 %> -->
</div>

效果





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