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使用JSP實現簡單的用戶登錄注冊頁面示例代碼解析
瀏覽：224日期：2022-06-08 09:41:05
實驗要求：
將實驗2中的系統用戶登錄和注冊頁面改為JSP頁面，并部署自己的Web應用于Tomcat服務器中
具體要求：
完成登錄JSP頁面設計和注冊頁面設計
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</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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作業</a> </div> <div id="bs-example-navbar-collapse-1"> <ul> <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> <div> <h1>Hello, world!</h1> <p>這是一個jsp作業</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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作業</a> </div> <div id="bs-example-navbar-collapse-1"> <ul> <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> <div> <div> </div> <div> <form method="post" action="login-check.jsp"> <h2>登錄到jsp作業</h2> <label for="">用戶名</label> <input type="text" name="username" id="username" placeholder="請輸入用戶名" required autofocus><br> <label for="">密碼</label> <input type="password" name="password" id="password" placeholder="請輸入密碼" required> <div> <label> <input type="checkbox" value="remember-me" checked="checked"> 記住密碼 </label> </div> <button type="submit" id="btn-login">登錄</button> <a href="reg.jsp" rel="external nofollow" rel="external nofollow">注冊</a> </form> </div> <div> </div> </div></body></html>
登錄結果頁面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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作業</a> </div> <div id="bs-example-navbar-collapse-1"> <ul> <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> <div> <div> </div> <div> <form method="post" action="login-check.jsp"> <h2>登錄到jsp作業</h2> <label for="">用戶名</label> <input type="text" name="username" id="username" placeholder="請輸入用戶名" required autofocus><br> <label for="">密碼</label> <input type="password" name="password" id="password" placeholder="請輸入密碼" required> <div> <label> <input type="checkbox" value="remember-me" checked="checked"> 記住密碼 </label> </div> <button type="submit" id="btn-login">登錄</button> <a href="reg.jsp" rel="external nofollow" rel="external nofollow">注冊</a> </form> </div> <div> </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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作業</a> </div> <div id="bs-example-navbar-collapse-1"> <ul> <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> <div> <div> </div> <div> <form action="reg-submit.jsp" method="post"> <h2>注冊到jsp作業</h2> <div id="info"> </div> <label for="">用戶名</label> <input type="text" name="username" id="username" placeholder="請輸入用戶名" required autofocus><br> <label for="">密碼</label> <input type="password" name="password" id="password" placeholder="請輸入密碼" required><br> <label for="">重復密碼</label> <input type="password" name="password2" id="password2" placeholder="請再次輸入密碼" required maxLength="16"><br> <button type="submit" 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" id="btn-reg">返回登錄</a> </form> </div> <div> </div> </div></body></html>
注冊結果頁面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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作業</a> </div> <div id="bs-example-navbar-collapse-1"> <ul> <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> <% 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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