JavaWeb 网上书店 注册和登陆功能案例详解

JavaWeb 网上书店 注册和登陆功能案例详解

本文实例讲述了javaWeb 网上书店 注册和登陆功能。分享给大家供大家参考，具体如下：

工具：Eclipse + Navicat

源码地址：https://github.com/Sunjinhang/JavaWeb

用户实体：简简单单的六个属性，编号、姓名、密码、电话、邮箱、地址。

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;

}

}

用户实现登陆注册的一些方法：包含注册、登陆、密码MD5加密、编号随机生成

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 < charArr.length; i++) {

byteArr[i] = (byte)charArr[i];

}

byte[] md5Arr = md5.digest(byteArr);

for(int i = 0;i < md5Arr.length; i++) {

int value = (int)md5Arr[i] & 0xff;

if(value < 16)

{

code.append("0");

}

code.append(Integer.toHexString(value));

}

return code.toString();

}

}

注册功能实现：

静态页面：

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

代码：

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();

}

}

}

登陆功能实现：

静态页面：

index.jsp

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

head.jsp

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

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

首页

查看购物车

查看订单

用户名：

密码：

欢迎您：${user.getUserName() } 注销

代码：

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);

}

}

最终实现的效果：

主界面

注册界面：

登陆成功界面

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