JSP实现登陆页面(表单提交、连接数据库、实现页面跳转)

JSP实现登陆页面(表单提交、连接数据库、实现页面跳转)1.数据库设计2.主页面展示3.代码展示：index.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Tra

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白芷加茯苓

37941人浏览 · 2020-07-16 15:59:04

白芷加茯苓 · 2020-07-16 15:59:04 发布

JSP实现登陆页面(表单提交、连接数据库、实现页面跳转)

1.数据库设计

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2.主页面展示

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3.代码展示：

index.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>登陆页面</title>
	<link rel="stylesheet" type="text/css" href="css/style.css" />
	<link rel="stylesheet" href="https://cdn.staticfile.org/font-awesome/4.7.0/css/font-awesome.css">
</head>
<body>
	<div id="bigBox">
			<h1>LOGIN</h1>
			<div class="inputBox">
				<form action="check.jsp" method="post">
					<div class="inputText">
						<i class="fa fa-user-circle" style="color: whitesmoke;"></i>
						<input type="text" placeholder="手机号或邮箱" name="username"/>
					</div>
					<div class="inputText">
						<i class="fa fa-key" style="color: whitesmoke;"></i>
						<input type="password" placeholder="密码" name="password"/>
					</div>
					<input type="submit" class="inputButton" value="LOGIN" />
				</form>
			</div>
		</div>
</body>
</html>

登录页面对应的CSS文件

body{
	margin: 0;
	padding: 0;
	background-image: url(../img/国漫.jpg);
	background-repeat: no-repeat;
}
a{
	color: #666;
	text-decoration: none;
}
#bigBox
{
	margin: 0 auto;
	margin-top: 100px;
	padding: 20px 50px;
	background-color: #000000;
	width: 500px;
	height: 400px;
	border-radius: 20px;
	text-align: center;
	background-image: linear-gradient(60deg, #29323c 0%, #485563 100%);
}
#bigBox h1
{
	font-size: 40px;
	color: floralwhite;
}
#bigBox .inputBox
{
	margin-top: 35px;
}
#bigBox .inputBox .inputText
{
	margin-top: 20px;
}
#bigBox .inputBox .inputText input
{
	border: 0;
	padding: 10px 10px;
	border-bottom: 1px solid white;
	background-color: #00000000;
	color: white;
	width: 200px;
	height: 40px;
	font-size: 20px;
}
#bigBox .inputBox .inputText i
{
	color: white;
}
#bigBox .inputBox .inputButton
{
	border: 0;
	width: 200px;
	height: 50px;
	color: white;
	margin-top: 55px;
	border-radius:20px;
	background-image: linear-gradient(to right, #b8cbb8 0%, #b8cbb8 0%,#b465da 0%, #cf6cc9 33%, #ee609c 66%, #ee609c 100%);
}

check.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"  %>
<!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>Insert title here</title>
</head>
<body>
	<%
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		
		Connection connection = null;
		Statement statement = null;
		ResultSet rs = null;
		
		
		try {
			// 导入驱动，加载具体的驱动类
			Class.forName("com.mysql.jdbc.Driver");
			
			//与数据库建立连接
			connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/test01", "root", "root");
			statement = connection.createStatement();
			//发送sql语句，执行
			String sql = "select count(*) from login where username = '"+username+"' and password = '"+password+"'  ";
			rs = statement.executeQuery(sql);
			//处理结果
			int count = -1;
			if (rs.next()) {
				count = rs.getInt(1);
			}
			if (count > 0) {
				request.getRequestDispatcher("success.jsp").forward(request, response);
			}else {
				request.getRequestDispatcher("error.jsp").forward(request, response);
			}
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}finally {
				try {
					if(rs != null) rs.close();
					if(statement != null) statement.close();
					if(connection != null) connection.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
		}
	%>
</body>
</html>

success.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>登陆成功</title>
	<link rel="stylesheet" href="https://cdn.staticfile.org/font-awesome/4.7.0/css/font-awesome.css">
	<link rel="stylesheet" type="text/css" href="css/style.css" />
</head>
<body>
	<div id="main">
		<i class="fa fa-diamond fa-5x" style="color: #ed9db2; size: 50;"></i>
		<h3 style="display: inline-block; ">登陆成功！！</h3>
	</div>
</body>
</html>

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error.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>登陆失败</title>
	<link rel="stylesheet" href="https://cdn.staticfile.org/font-awesome/4.7.0/css/font-awesome.css">
	<link rel="stylesheet" type="text/css" href="css/style.css" />
</head>
<body>
	<div id="main">
		<i class="fa fa-exclamation-triangle fa-5x" style="color: darkgrey; size: 50;"></i>
		<h3 style="display: inline-block; ">登陆失败，请重新检查用户名或密码是否正确！！</h3>
	</div>
</body>
</html>