Servlet(4):一個簡單的註冊頁面
阿新 • • 發佈:2020-07-19
一. 註冊要求
1. 一個註冊頁面
- username (文字框)
- password:密碼 (密碼框)
- passwordYes :再次輸入密碼(密碼框)
- hobby (多選框)
- sex (單選框)
- info (文字域)
2. servlet處理註冊資訊,判斷兩次密碼是否相同
- 相同則跳到成功頁面
- 不同則註冊失敗,重定向到註冊頁面
3. 成功頁面
- 顯示登陸成功的使用者名稱,密碼,愛好,性別和資訊;
- 顯示一個登出按鈕
4. 如果登出後,或者沒登入,不能直接進入成功頁面,跳轉到失敗介面
二. 具體操作步驟
1:在index.jsp(首頁)寫一個超連結,讓跳轉到註冊介面
2:寫好註冊介面後,提交給ServeltRegister處理
3:跳轉到ServletRegister註冊介面,把使用者訊息放進session中,並判斷輸入的密碼是否正確
4:如果密碼成功,跳轉到成功介面,並在成功介面顯示使用者填寫的資訊
5:在成功頁面設定登出按鈕,按下注銷按鈕後,跳轉到ServletOut登出介面
6:當用戶訊息登出後,讓其回到成功頁面,然後提示使用者未註冊或者已登出,請先註冊
7:在提示頁面設定註冊按鈕,讓其重新註冊,回到註冊頁面
8:如果密碼輸出錯誤,讓其回到註冊頁面,並用彈框提醒
三. 程式碼
1:首頁 index.jsp
<html>
<head>
<title> 首頁</title>
<style>
body{
margin: 0 auto;
text-align: center;
}
</style>
</head>
<body>
<h1>首頁</h1>
<hr>
<a href="${pageContext.request.contextPath}/register.jsp">註冊</a>
</body>
</html>
2:註冊頁 register.jsp
<html>
<head>
<title>註冊</title>
<script>
var status = '${sessionScope.pwdFail}';
if (status=='yes'){
alert("兩次密碼輸入不一樣,請重新輸入")
}
</script>
</head>
<body>
<h1>註冊</h1>
<form action="${pageContext.request.contextPath}/Register" method="post">
<p>使用者名稱: <input type="text" name="username" required ></p>
<p>密碼:<input type="password" name="password1" required></p>
<p>確認密碼:<input type="password" name="password2" required></p>
<p>愛好:
<input type="checkbox" name="hobby" value="movie">電影
<input type="checkbox" name="hobby" value="TV">電視
<input type="checkbox" name="hobby" value="music">音樂
</p>
<p>性別:
<input type="radio" name="sex" value="boy">男
<input type="radio" name="sex" value="girl">女
</p>
<p>個人簡介:
<textarea name="info"></textarea>
</p>
<p>
<input type="submit">
<input type="reset">
</p>
</form>
</body>
</html>
3:成功頁 success.jsp
<html>
<head>
<title>註冊成功</title>
<%
HttpSession session1 = request.getSession();
if(session1.getAttribute("username")==null){
request.getRequestDispatcher("loss.jsp").forward(request,response);
}
%>
</head>
<body>
<h1>註冊成功!</h1>
<%--通過sessionScope得到資訊--%>
<p> 使用者名稱:${sessionScope.username}</p>
<p> 密碼:${sessionScope.password1}</p>
<p> 性別:${sessionScope.sex}</p>
<p> 愛好:${sessionScope.hobbies}</p>
<p> 簡介:${sessionScope.info}</p>
<a href="${pageContext.request.contextPath}/Out">登出</a>
</body>
</html>
4:提示頁 loss.jsp
<html>
<head>
<title>失敗</title>
</head>
<body>
<h1>
沒有session資訊,未註冊或者已登出,請先註冊
</h1>
<a href="${pageContext.request.contextPath}/register.jsp">註冊</a>
</body>
</html>
5:web.xml
<servlet>
<servlet-name>ServletRegister</servlet-name>
<servlet-class>com.sunzhen.ServletRegister</servlet-class>
</servlet>
<servlet>
<servlet-name>ServletOut</servlet-name>
<servlet-class>com.sunzhen.ServletOut</servlet-class>
</servlet>
<span class="hljs-tag"><<span class="hljs-name">servlet-mapping</span>></span>
<span class="hljs-tag"><<span class="hljs-name">servlet-name</span>></span>ServletOut<span class="hljs-tag"></<span class="hljs-name">servlet-name</span>></span>
<span class="hljs-tag"><<span class="hljs-name">url-pattern</span>></span>/Out<span class="hljs-tag"></<span class="hljs-name">url-pattern</span>></span>
<span class="hljs-tag"></<span class="hljs-name">servlet-mapping</span>></span>
<span class="hljs-tag"><<span class="hljs-name">servlet-mapping</span>></span>
<span class="hljs-tag"><<span class="hljs-name">servlet-name</span>></span>ServletRegister<span class="hljs-tag"></<span class="hljs-name">servlet-name</span>></span>
<span class="hljs-tag"><<span class="hljs-name">url-pattern</span>></span>/Register<span class="hljs-tag"></<span class="hljs-name">url-pattern</span>></span>
<span class="hljs-tag"></<span class="hljs-name">servlet-mapping</span>></span>
6:註冊 ServletRegister
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
<span class="hljs-comment">//獲得使用者提交的資料</span>
<span class="hljs-built_in">String</span> username = request.getParameter(<span class="hljs-string">"username"</span>);
<span class="hljs-built_in">String</span> password1 = request.getParameter(<span class="hljs-string">"password1"</span>);
<span class="hljs-built_in">String</span> password2 = request.getParameter(<span class="hljs-string">"password2"</span>);
<span class="hljs-built_in">String</span> sex = request.getParameter(<span class="hljs-string">"sex"</span>);
<span class="hljs-built_in">String</span> info = request.getParameter(<span class="hljs-string">"info"</span>);
<span class="hljs-built_in">String</span>[] hobbies = request.getParameterValues(<span class="hljs-string">"hobby"</span>);
<span class="hljs-keyword">if</span>(password1.equals(password2)){
<span class="hljs-comment">//把使用者訊息放進session中</span>
HttpSession session = request.getSession();
session.setAttribute(<span class="hljs-string">"username"</span>,username);
session.setAttribute(<span class="hljs-string">"password1"</span>,password1);
session.setAttribute(<span class="hljs-string">"sex"</span>,sex);
session.setAttribute(<span class="hljs-string">"info"</span>,info);
session.setAttribute(<span class="hljs-string">" hobbies"</span>, Arrays.toString(hobbies));
response.sendRedirect(<span class="hljs-string">"success.jsp"</span>);
<span class="hljs-comment">//request.getRequestDispatcher("success.jsp").forward(request,response);</span>
}<span class="hljs-keyword">else</span> {
request.getSession().setAttribute(<span class="hljs-string">"pwdFail"</span>,<span class="hljs-string">"yes"</span>);
response.sendRedirect(<span class="hljs-string">"register.jsp"</span>);
}
7:登出 ServletOut
HttpSession session = request.getSession();
//登出session或者移除session中的資料
session.removeAttribute("username");
session.removeAttribute("password1");
session.removeAttribute("sex");
session.removeAttribute("hobbies");
session.removeAttribute("info");
response.sendRedirect(<span class="hljs-string">"success.jsp"</span>);