定义一个Users类
package srever; public class Users { private String username; private String password; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } } 定义一个UserDao类package srever; //用户的业务逻辑类 public class UsersDAO { //用户登录方法 public boolean usersLogin(Users u) { if("admin".equals(u.getUsername())&&"admin".equals(u.getPassword())) { return true; } else { return false; } } } 定义一个login的jsp页面<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%> <% request.setCharacterEncoding("utf-8"); %> <jsp:useBean id="loginUser" class="srever.Users" scope="page"/> <jsp:useBean id="userDAO" class="srever.UsersDAO" scope="page"/> <jsp:setProperty property="*" name="loginUser"/> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; //如果用户和密码都等于admin,则登录成功 if(userDAO.usersLogin(loginUser)) { session.setAttribute("loginUser", loginUser.getUsername()); request.getRequestDispatcher("login_success.jsp").forward(request, response); } else { response.sendRedirect("login_failure.jsp"); } %> 定义一个dologin的jsp页面<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; String username =""; String password =""; request.setCharacterEncoding("utf-8");//防止中文乱码 username = request.getParameter("username"); password = request.getParameter("password"); //如果用户和密码都等于admin,则登录成功 if("admin".equals(username)&&"admin".equals(password)) { session.setAttribute("loginUser", username); request.getRequestDispatcher("login_success.jsp").forward(request, response); } else { response.sendRedirect("login_failure.jsp"); } %> 定义一个登录成功的页面login_success<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <html> <head> <!-- Page title --> <title>imooc - Login</title> <!-- End of Page title --> <!-- Libraries --> <link type="text/css" href="css/login.css" rel="stylesheet" /> <link type="text/css" href="css/smoothness/jquery-ui-1.7.2.custom.html" rel="stylesheet" /> <script type="text/javascript" src="js/jquery-1.3.2.min.js"></script> <script type="text/javascript" src="js/easyTooltip.js"></script> <script type="text/javascript" src="js/jquery-ui-1.7.2.custom.min.js"></script> <!-- End of Libraries --> </head> <body> <div id="container"> <div class="logo"> <a href="#"><img src="assets/logo.png" alt="" /></a> </div> <div id="box"> <% String loginUser = ""; if(session.getAttribute("loginUser")!=null) { loginUser = session.getAttribute("loginUser").toString(); } %> 欢迎您<font color="red"><%=loginUser%></font>,登录成功！ </div> </div> </body> </html>
