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 Transitional//EN" "/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="/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" "/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" "/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="/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>
error.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "/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="/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>
