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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
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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</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" >登录</a></li> </ul> </div> </div></nav><div> <div> <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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</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" >登录</a></li> </ul> </div> </div></nav><div> <div> <div> </div> <div> <form method="post" action="login-check.jsp"> <h2>登录到jsp作业</h2> <label for="">用户名</label> <input type="text" name="username" id="username" placeholder="请输入用户名" required autofocus><br> <label for="">密码</label> <input type="password" name="password" id="password" placeholder="请输入密码" required> <div> <label> <input type="checkbox" value="remember-me" checked="checked"> 记住密码 </label> </div> <button type="submit" id="btn-login">登录</button> <a href="reg.jsp" rel="external nofollow" rel="external nofollow">注册</a> </form> </div> <div> </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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</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" >登录</a></li> </ul> </div> </div></nav><div> <div> <div> </div> <div> <form method="post" action="login-check.jsp"> <h2>登录到jsp作业</h2> <label for="">用户名</label> <input type="text" name="username" id="username" placeholder="请输入用户名" required autofocus><br> <label for="">密码</label> <input type="password" name="password" id="password" placeholder="请输入密码" required> <div> <label> <input type="checkbox" value="remember-me" checked="checked"> 记住密码 </label> </div> <button type="submit" id="btn-login">登录</button> <a href="reg.jsp" rel="external nofollow" rel="external nofollow">注册</a> </form> </div> <div> </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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</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" >登录</a></li> </ul> </div> </div></nav><div> <div> <div> </div> <div> <form action="reg-submit.jsp" method="post"> <h2>注册到jsp作业</h2> <div id="info"> </div> <label for="">用户名</label> <input type="text" name="username" id="username" placeholder="请输入用户名" required autofocus><br> <label for="">密码</label> <input type="password" name="password" id="password" placeholder="请输入密码" required><br> <label for="">重复密码</label> <input type="password" name="password2" id="password2" placeholder="请再次输入密码" required maxLength="16"><br> <button type="submit" 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" id="btn-reg">返回登录</a> </form> </div> <div> </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> <div> <div> <a href="./" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jsp作业</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" >登录</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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