login.jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>register</title> <style type="text/css" ></style> </head> <body> <form action="success1.jsp" method="post"> 用户名：<input type="text" name="uname"><br> 密 码：<input type="password" name="upwd"><br> 验证码： <input type="text" name="code_text" size="3" /> <img src="image/yzm.jpeg" id="img_src" width=80 heighe=40/> <a href="image/date.jpg">换一张</a> <br> <input type="submit" value="提交"> </form> </body> </html> success.jsp <%@page import="java.sql.ResultSet"%> <%@page import="java.sql.PreparedStatement"%> <%@page import="java.sql.DriverManager"%> <%@page import="java.sql.Connection"%> <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8" import=" javax.servlet.http.HttpSession" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <% request.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=utf-8"); response.setCharacterEncoding("UTF-8"); HttpSession s = request.getSession(); String username = request.getParameter("uname"); String password1 = request.getParameter("upwd"); Class clazz = Class.forName("com.mysql.jdbc.Driver"); // 2.提供另外三个连接的基本信息 String url = "jdbc:mysql://localhost:3306/school"; String user = "root"; String password = "root"; Connection conn = DriverManager.getConnection(url, user, password); PreparedStatement ps = conn.prepareStatement("select uname,upwd from user where uname = ? and upwd = ?"); ps.setString(1, username); ps.setString(2, password1); ResultSet rs = ps.executeQuery(); if(rs.next()){ session.setAttribute("username", username); session.setAttribute("password", password1); response.sendRedirect("success1.jsp"); }else{ response.sendRedirect("login.jsp"); } %> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Insert title here</title> </head> <body> </body> </html> success1.jsp <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8" import=" javas.servlet.http.HttpSession" %> <!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> <% HttpSession s = request.getSession(); String username = s.getAttribute("uname").toString(); String password = s.getAttribute("upwd").toString(); %> 用户名 ： <%=username %><br/> 密码 ： <%=password %> </body> </html>
