一.项目功能结构

1.功能

2.实体

3.对应sql语句

CREATE DATABASE shop;

use shop;

create table user(

id int(11) primary key auto_increment,

username varchar(100),

password varchar(100),

nickname varchar(100),

type int(5)

);

INSERT INTO user VALUES (null,'admin','7946521','管理员',1);

CREATE TABLE address(

id INT(10) PRIMARY KEY AUTO_INCREMENT,

name VARCHAR(255),

phone VARCHAR(100),

postcode VARCHAR(100),

user_id INT(10),

CONSTRAINT FOREIGN KEY (user_id) REFERENCES user(id)

);

INSERT INTO address VALUES (NULL ,'安徽阜阳','1234567890','236000','1');

SELECT t1.*,t2.* FROM address t1 LEFT JOIN user t2 ON t1.user_id = t2.id where t1.user_id =1 ;

create table orders(

id int(11) primary key auto_increment,

buy_date datetime,

pay_date datetime,

confirm_date datetime,

status int(5),

user_id int(11),

address_id int(11),

CONSTRAINT FOREIGN KEY(user_id) REFERENCES user(id),

CONSTRAINT FOREIGN KEY(address_id) REFERENCES address(id)

);

create table category(

id int(11) primary key auto_increment,

name varchar(100)

);

create table goods(

id int(11) primary key auto_increment,

name varchar(100),

price double,

intro text,

img varchar(100),

stock int(10),

c_id int(10),

CONSTRAINT FOREIGN KEY(c_id) REFERENCES category(id)

);

create table goods_orders(

id int(11) primary key auto_increment,

goods_id int(10),

orders_id int(10),

CONSTRAINT FOREIGN KEY(goods_id) REFERENCES goods(id),

CONSTRAINT FOREIGN KEY(orders_id) REFERENCES orders(id)

);

二.项目准备

1.实体类实现

分别建立dao,filter,model,util的包,并在model中实现实体类,这里以User.java为例.

注意对于数据库中外键,比如adress表中有外键user_id,那么在Adress.java中就可以直接给个User对象,在取adress表的时候就把user一并取出来.

User.java

package com.model;

import java.util.List;

/**

* Created by nl101 on 2016/2/22.

*/

public class User {

private int id;//id

private String username;

private String password;

private String nickname;//昵称

private int type;//1表示管理员,2表示注册用户

private List