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使用JSP實現(xiàn)簡單的用戶登錄注冊頁面示例代碼解析

 更新時間：2020年08月05日 16:53:15   作者：Hades_Dev  
這篇文章主要介紹了使用JSP實現(xiàn)簡單的用戶登錄注冊頁面示例代碼解析，文中通過示例代碼介紹的非常詳細，對大家的學(xué)習或者工作具有一定的參考學(xué)習價值，需要的朋友們下面隨著小編來一起學(xué)習學(xué)習吧

實驗要求：

將實驗2中的系統(tǒng)用戶登錄和注冊頁面改為JSP頁面，并部署自己的Web應(yīng)用于Tomcat服務(wù)器中

具體要求：

完成登錄JSP頁面設(shè)計和注冊頁面設(shè)計

在登錄頁面表單中使用request對象獲取用戶信息，建立新的JSP頁面完成登錄驗證（用戶名和密碼自己指定即可）。

驗證結(jié)果顯示（如登錄成功/用戶名密碼錯誤，可以使用JavaScript，也可以使用新的JSP頁面）。

在注冊頁面表單中使用request對象獲取用戶注冊信息（注冊項目由自己指定），在新的JSP頁面顯示用戶注冊信息，并提示注冊成功。

代碼

登錄頁面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作業(yè)</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作業(yè)</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" >登錄</a></li>
   </ul>
  </div>
 </div>
</nav>
<div class="container">
 <div class="jumbotron">
  <h1>Hello, world!</h1>
  <p>這是一個jsp作業(yè)</p>
 </div>
</div>
</body>
</html>

登錄頁面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>登錄</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作業(yè)</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" >登錄</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">登錄到j(luò)sp作業(yè)</h2>
    <label for="">用戶名</label>
    <input type="text" name="username" id="username" class="form-control" placeholder="請輸入用戶名" required autofocus><br>
    <label for="">密碼</label>
    <input type="password" name="password" id="password" class="form-control" placeholder="請輸入密碼" required>
    <div class="checkbox">
     <label>
      <input type="checkbox" value="remember-me" checked="checked"> 記住密碼
     </label>
    </div>
    <button type="submit" class="btn btn-primary" id="btn-login">登錄</button>
    <a href="reg.jsp" rel="external nofollow" rel="external nofollow" class="btn btn-default">注冊</a>
   </form>
  </div>
  <div class="col-md-4">
  </div>
 </div>
</body>
</html>

登錄結(jié)果頁面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>登錄</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作業(yè)</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" >登錄</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">登錄到j(luò)sp作業(yè)</h2>
    <label for="">用戶名</label>
    <input type="text" name="username" id="username" class="form-control" placeholder="請輸入用戶名" required autofocus><br>
    <label for="">密碼</label>
    <input type="password" name="password" id="password" class="form-control" placeholder="請輸入密碼" required>
    <div class="checkbox">
     <label>
      <input type="checkbox" value="remember-me" checked="checked"> 記住密碼
     </label>
    </div>
    <button type="submit" class="btn btn-primary" id="btn-login">登錄</button>
    <a href="reg.jsp" rel="external nofollow" rel="external nofollow" class="btn btn-default">注冊</a>
   </form>
  </div>
  <div class="col-md-4">
  </div>
 </div>
</body>
</html>

注冊頁面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>注冊</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作業(yè)</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" >登錄</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">注冊到j(luò)sp作業(yè)</h2>
    <div id="info">

    </div>
    <label for="">用戶名</label>
    <input type="text" name="username" id="username" class="form-control" placeholder="請輸入用戶名" required autofocus><br>
    <label for="">密碼</label>
    <input type="password" name="password" id="password" class="form-control" placeholder="請輸入密碼" required><br>
    <label for="">重復(fù)密碼</label>
    <input type="password" name="password2" id="password2" class="form-control" placeholder="請再次輸入密碼" required maxLength="16"><br>
    <button type="submit" class="btn btn-primary" id="btn-reg">注冊</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">返回登錄</a>
   </form>
  </div>
  <div class="col-md-4">
  </div>
 </div>
</body>
</html>

注冊結(jié)果頁面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>結(jié)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作業(yè)</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" >登錄</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'>注冊成功</div>");
  out.println("<ul class='list-group'>");
  out.println("<li class='list-group-item'>用戶名：" + username + "</li>");
  out.println("<li class='list-group-item'>密碼：" + password + "</li>");
  out.println("</ul>");
 }
 else{
  out.println("<div class='alert alert-danger' role='alert'>兩次密碼輸入不一致，請重新輸入</div>");
 }
 %>
 <!-- <%=username %>
 <%=password %>
 <%=password2 %> -->
</div>

效果

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這里寫圖片描述

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這里寫圖片描述

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