jsp登入驗證 - tw511教學網

題目要求

編寫JSP頁面login1.jsp、server.jsp 和loginSuccessjsp.在頁面login 1.jsp 中輸入使用者名稱和密碼，單擊「提交」按鈕將輸入的資訊提交給頁面server.jsp。在server.jsp頁面中進行登入驗證:如果輸入正確(使用者名稱為「zhangsan",密碼為「123」，提示「成功登入，3秒鐘後進入loginSuccess.jsp頁面」;如果輸入不正確，重新定向到login 1.jsp 頁面。執行login 1.jsp 頁面。

頁面執行效果如圖所示：
在這裡插入圖片描述

登入頁面login1.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登入頁面</title>
</head>
<body>
<form action="server.jsp">

		姓名：<input type="text" name="userName" value="">
		<br>
		密碼：<input type="password" name="pwd" value="">
		<br>
			<input type="submit" value="提交">

</form>
</body>
</html>

登入中……server.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登入中……</title>
</head>
<body>
<%
	String username=request.getParameter("userName");
	String password=request.getParameter("pwd");
	if("zhangsan".equals(username)&&"123".equals(password)){
		out.print("成功登陸,3秒後進入loginSuccess.jsp頁面");
		response.setHeader("refresh", "3;url=loginSuccess.jsp");		
	}else{
		out.print("賬號或密碼錯誤,2秒後回到login1.jsp頁面");
		response.setHeader("refresh", "2;url=login_1.jsp");		
	}
	
%>
</body>
</html>

loginSuccess.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登陸成功</title>
</head>
<body>
	<font color="green" align="center">歡迎張三登入成功！</font>
</body>
</html>