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>