百度云链接: https://pan.baidu.com/s/1hBiWGxmzSoCFPu4bHhbApg 提取码: x222
一：用户名登录
相关代码：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>登录页面</title> <link rel="stylesheet" type="text/css" href="CSS/style.css"> <script type="text/javascript" src="js/login.js"></script> </head> <body> <div id="page"> <div id="page_head"> <div id="logo"> <img src="img/login_logo.png"> </div> </div> <div id="page_body"> <div id="login"> <div id="loginTitle"><b>账号登录</b></div> <div id="tip">请填写用户名</div> <form action="MyServlet" method="post" onsubmit="return fnLogin()"> <div id="tt" style="position:absolute; height:40px; left:30px; top:60px;"><b>用户登录</b></div> <div class="textitem1"> <input style="320px;height:30px" id="input_user" name="input_user" type="text" placeholder="用户名"> </div> <div class="textitem2"> <input style="320px;height:30px" id="input_password" name="input_password" type="password" placeholder="密码"> </div> <div style="position: absolute; left:30px; top:220px; 320px"> <span style="color:red;float:left">学生选择@stu.swpu.edu.cn</span> <a href="#" style="float: right;">忘记密码</a> </div> <div style="position: absolute; left:30px; top:260px; 320px"> <input id="subbtn" onclick="fnLogin()" style="float:right;background:url(img/login_btn.jpg);" class="btn" type="submit" value="登 录" /> </div> </form> </div> </div> <div id="page_foot"> 西南石油大学 </div> </div> </body> </html> HTML
package com.swpu; import java.io.IOException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * implementation class check */ @WebServlet("/MyServlet") public class MyServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public MyServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub request.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); String userName = request.getParameter("input_user"); String passWord = request.getParameter("input_password"); /*response.getWriter().write("用户名：" + userName); response.getWriter().write("</br>"); response.getWriter().write("密码：" + userPass);*/ try { // 加载驱动程序 Class.forName("com.mysql.jdbc.Driver"); // URL指向要访问的数据库名test String url = "jdbc:mysql://127.0.0.1:3306/login"; // MySQL配置时的用户名 String user = "root"; // MySQL配置时的密码 String password = "as471147112"; // 连续数据库 Connection connection = DriverManager.getConnection(url, user, password); if(!connection.isClosed()) System.out.println("Succeeded connecting to the Database!"); // statement用来执行SQL语句 Statement statement = connection.createStatement(); // 要执行的SQL语句 String sql = "SELECT * FROM USER WHERE userName = '" + userName + "' AND passWord = " + passWord; // 执行SQL语句并返回结果集 ResultSet rs = statement.executeQuery(sql); if(!rs.next()){ response.getWriter().write("用户名或密码错误"); } else{ response.getWriter().write("用户名：" + rs.getString(1)); response.getWriter().write("</br>"); response.getWriter().write("密码：" + rs.getInt(2)); } // 关闭结果集 rs.close(); // 关闭连接 connection.close(); } catch(ClassNotFoundException e) { System.out.println("Sorry,can`t find the Driver!"); e.printStackTrace(); } catch(SQLException e) { e.printStackTrace(); } catch(Exception e) { e.printStackTrace(); } } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } } Servlet