package Entity; public class User { public User(String id, String userName, String password, String phone, String email, String address) { super(); this.id = id; this.userName = userName; this.password = password; this.phone = phone; this.email = email; this.address = address; } private String id; private String userName; private String password; private String phone; private String email; private String address; public String getId() { return id; } public void setId(String id) { this.id = id; } 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; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } } 

 package Service; import java.security.MessageDigest; import java.util.UUID; import Dao.UserDao; import Entity.User; public class UserService extends UserDao{ public void AddUser(User user) { user.setId(GetUId()); user.setPassword(MD5Encode(user.getPassword())); Add(user); } public User ValidateLogin(String name,String password) { User user = Validate(name,MD5Encode(password)); return user; } //自动给用户生成编号 public static String GetUId() { UUID uid = UUID.randomUUID(); String id = uid.toString(); id = id.replace("-", ""); return id; } //给用户密码进行MD5加密 public static String MD5Encode(String str) { StringBuffer code = new StringBuffer(); MessageDigest md5 = null; try { md5 = MessageDigest.getInstance("MD5"); } catch(Exception ex) { ex.printStackTrace(); } char[] charArr = str.toCharArray(); byte[] byteArr = new byte[charArr.length]; for(int i = 0;i 

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>   
 

 package Action; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import Entity.User; import Service.UserService; /** * Servlet implementation class RegisterServlet */ @WebServlet("/RegisterServlet") public class RegisterServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public RegisterServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String name = request.getParameter("name"); String password = request.getParameter("password"); String phone = request.getParameter("phone"); String email = request.getParameter("email"); String address = request.getParameter("address"); User user = new User("",name,password,phone,email,address); UserService userService = new UserService(); try { userService.AddUser(user); request.setAttribute("message", "注册成功"); request.getRequestDispatcher("/message.jsp").forward(request, response); } catch(Exception ex) { ex.printStackTrace(); } } } 

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>    

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>   
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 package Action; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import Entity.User; import Service.UserService; /** * Servlet implementation class LoginServlet */ @WebServlet(description = "处理登陆事项", urlPatterns = { "/LoginServlet" }) public class LoginServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public LoginServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String username = request.getParameter("username"); String password = request.getParameter("password"); UserService service = new UserService(); User user = service.ValidateLogin(username, password); if(user == null){ request.setAttribute("message", "登陆失败"); request.getRequestDispatcher("/message.jsp").forward(request, response); return; } request.getSession().setAttribute("user", user); request.getRequestDispatcher("/client/head.jsp").forward(request, response); } }