开发者学堂课程【Java Web项目实战2：图书商城：用户模块的相关类创建】学习笔记，与课程紧密联系，让用户快速学习知识。
课程地址：https://developer.aliyun.com/learning/course/35
用户模块的相关类创建
1. domain:User
2. dao: UserDao
3. service: UserDao
4. web.servlet:Userservlet
一：User
1．package cn.itcast.bookstore.user.domain;
2．/**
3．*User的领域对象
4．*@author cxf
5．*
6．*/
7．public class User {
8．/*
9．对应数据库表
10．*/
11．private String uid;//主键
12．private String username;//用户名
13．private String password;//密码
14．private String email；//邮箱
15．private String code;//激活码
16．private boolean state;//状态（已激活和未激活）
二：UserDao
1. package cn.itcast.bookstore.user.dao;
2. /**
3. *User持久层
4. *@author cxf
5. *
6. */
7. public class UserDao {
8. private QueryRunner qr = new TxQueryRunner();
9. }
三：UserService
1. package cn.itcast.bookstore.user.service;
2. import cn.itcast.bookstore.user.dao.UserDao;
3. /**
4. *User业务层
5. *@author cxf
6. *
7. */
8. public class UserService {
9. private UserDao userDao = new UserDao();
10. }
四：Userservlet
1. package cn.itcast.bookstore.user.web.servlet;
2. import cn.itcast.bookstore.user.service.Userservice;
3. import cn.itcast.servlet.Baseservlet;
4. /**
5. *User表述层
6. */
7. public class UserServlet extends BaseServlet {
8. private UserService userService = new UserService();
9. }
