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<Address> addresses; public List<Address> getAddresses() { return addresses; } public void setAddresses(List<Address> addresses) { this.addresses = addresses; } public int getId() { return id; } public void setId(int 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 getNickname() { return nickname; } public void setNickname(String nickname) { this.nickname = nickname; } public int getType() { return type; } public void setType(int type) { this.type = type; } }

Adress.java

package com.model; /** * Created by nl101 on 2016/2/22. */ public class Address { private int id; private String name; private String phone; private String postcode; //直接给user对象,来代替user_id private User user; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public String getPostcode() { return postcode; } public void setPostcode(String postcode) { this.postcode = postcode; } public User getUser() { return user; } public void setUser(User user) { this.user = user; } }

2.分页框架准备

分页主要是写pager.java和SystemContext.java以及SystemFilter.java三个类.

完整建立后如下

本文是项目实战的第一篇，之后还有更新，希望大家不要错过。