说明：该篇博客是博主一字一码编写的，实属不易，请尊重原创，谢谢大家！
目录
一丶项目介绍
1.叙述
博主闲暇之余花了10个小时写的小程序，对于python操作数据库不太会的同学，很值得学习参考
通过python与mysql数据库的交互来模拟京东商城，代码逻辑就是对商品进行添加，修改，查询，以及删除操作，非常简单。
2.项目环境
操作系统：Linux（ubuntu）
IDE：PyCharm2018
数据库：MySQL
Python版本：3.5
二丶效果展示
说明：博主这里只是展示了查询功能中的单个商品信息查询，当查询商品不存在时，则会提示用户
运行程序----选择1商品查询功能----选择0查询单个商品信息----显示查询到几条数据----显示详情数据----显示查询功能菜单----选择4返回主功能菜单----跳转到主功能菜单
*******欢迎来到京东商城(主功能菜单)*******
1.商品查询功能
2.商品添加功能
3.商品修改功能
4.商品删除功能
5.退出程序
请选择功能序号：1
*******欢迎来到京东商城(查询功能)*******
0.查询单个商品信息
1.查询所有的商品信息
2.查询商品分类信息
3.查询所有的品牌分类信息
4.返回主功能菜单
请选择查询功能序号：0
请输入要查找商品名字：x
一共查询到5条记录
(2, 'x550cc 15.6英寸笔记本', 5, 2, Decimal('2799.000'), b'\x01', b'\x00')
(3, 'x240 超极本', 7, 7, Decimal('4880.000'), b'\x01', b'\x00')
(12, 'at7-7414lp 台式电脑 linux ）', 1, 3, Decimal('3699.000'), b'\x01', b'\x00')
(18, 'x3250 m4机架式服务器', 3, 1, Decimal('6888.000'), b'\x01', b'\x00')
(21, '华硕 ROG玩家国度GFX72 17英寸游戏 笔记本', 4, 2, Decimal('32998.000'), b'\x01', b'\x00')
*******欢迎来到京东商城(查询功能)*******
0.查询单个商品信息
1.查询所有的商品信息
2.查询商品分类信息
3.查询所有的品牌分类信息
4.返回主功能菜单
请选择查询功能序号：4
*******欢迎来到京东商城(主功能菜单)*******
1.商品查询功能
2.商品添加功能
3.商品修改功能
4.商品删除功能
5.退出程序
请选择功能序号：5
程序正在退出，请稍候....
Process finished with exit code 0三丶数据准备
1.创建数据库jing_dong
create database jing_dong charset = utf8;2.在jing_dong数据库中创建goods表
create table goods(
id int unsigned primary key auto_increment not null,
name varchar(150) not null,
cate_id int(10) unsigned not null,
brand_id int(10) unsigned not null,
price decimal(10,3) not null default 0,
is_show bit not null default 1,
is_saleoff bit not null default 0
);3.向goods商品信息表中插入以下数据
说明：其实除了goods商品信息表以外，还有goods_ctaes商品分类表以及goods_brands商品品牌表，在goods表中的cate_id以及brand_id都是指向这两张表中的主键id，因为博主在这里只是针对goods商品信息表进行增删改查，所以这里不需要用到那两张表
insert into goods values(0,'r510vc 15.6英寸笔记本',5,2,'3399',default,default);
insert into goods values(0,'y400n 14.0英寸笔记本电脑',5,7,'4999',default,default);
insert into goods values(0,'g150th 15.6英寸游戏本',4,9,'8499',default,default);
insert into goods values(0,'x550cc 15.6英寸笔记本',5,2,'2799',default,default);
insert into goods values(0,'x240 超极本',7,7,'4880',default,default);
insert into goods values(0,'u330p 13.3英寸超极本',7,7,'4299',default,default);
insert into goods values(0,'svp13226scb 触控超极本',7,6,'7999',default,default);
insert into goods values(0,'ipad mini 7.9英寸平板电脑',2,8,'1998',default,default);
insert into goods values(0,'ipad air 9.7英寸平板电脑',2,8,'3388',default,default);
insert into goods values(0,'ipad mini 配备 retina 显示屏',2,8,'2788',default,default);
insert into goods values(0,'ideacentre c340 20英寸一体电脑 ',1,7,'3499',default,default);
insert into goods values(0,'vostro 3800-r1206 台式电脑',1,5,'2899',default,default);
insert into goods values(0,'imac me086ch/a 21.5英寸一体电脑',1,8,'9188',default,default);
insert into goods values(0,'at7-7414lp 台式电脑 linux ）',1,3,'3699',default,default);
insert into goods values(0,'z220sff f4f06pa工作站',3,4,'4288',default,default);
insert into goods values(0,'poweredge ii服务器',3,5,'5388',default,default);
insert into goods values(0,'mac pro专业级台式电脑',3,8,'28888',default,default);
insert into goods values(0,'hmz-t3w 头戴显示设备',6,6,'6999',default,default);
insert into goods values(0,'商务双肩背包',6,6,'99',default,default);
insert into goods values(0,'x3250 m4机架式服务器',3,1,'6888',default,default);
insert into goods values(0,'商务双肩背包',6,6,'99',default,default);四丶代码实现
1.业务逻辑分为三层，第一层负责显示主功能菜单，第二层分为（增删改查）功能菜单，第三层详细功能实现
2.代码块说明：
class JD：具体业务代码逻辑实现，完成连接本地数据库，对数据库中的goods表数据进行增删改查业务操作
class Menu：功能界面选项打印显示
def select_main：查询功能主业务逻辑
def add_main：增加功能主业务逻辑
def update_main：修改功能主业务逻辑
def delete_main：删除功能主业务逻辑
def main：主功能业务逻辑
3.main方法代码实现
def main():
"""主功能菜单"""
while True:
Menu.print_main_menu()
num = input("请选择功能序号：")
if num == "1":
select_main()
elif num == "2":
add_main()
elif num == "3":
update_main()
elif num == "4":
delete_main()
elif num == "5":
JD().close_database()
print("程序正在退出，请稍候....")
time.sleep(2)
break
else:
print("您的输入不正确，请重新输入！")
4.select_main方法代码实现
def select_main():
"""查询商品信息功能"""
while True:
Menu.print_select_menu()
num = input("请选择查询功能序号：")
if num == "0":
find_name = input("请输入要查找商品名字：")
find_name = "%" + find_name + "%"
result, count = JD().select_single_good(find_name)
if result is not None:
print("一共查询到%s条记录" % count)
for res in result:
print(res)
else:
print("对不起！您输入的商品不存在...")
elif num == "1":
temps, count = JD().select_all_goods()
print("一共查询到%s个商品" % count)
for temp in temps:
print(temp)
elif num == "2":
result, count = JD().select_goods_class()
print("一共查询到%s类商品" % count)
print(result)
elif num == "3":
result, count = JD().select_goods_logo()
print("一共查询到有%s种品牌" % count)
print(result)
elif num == "4":
break
else:
print("输入不正确，请重新输入!")5.add_main方法代码实现
def add_main():
"""添加商品信息功能"""
while True:
Menu.print_add_menu()
num = input("请选择增加功能序号：")
if num == "1":
good_name = input("请输入商品名字：")
while True:
Menu.print_goods_cates()
good_cate = input("请选择商品分类：")
if good_cate in("1", "2", "3", "4", "5", "6", "7", "8", "9", "10"):
good_cate = int(good_cate)
break
else:
print("输入不正确，请重新输入！")
while True:
Menu.print_goods_brands()
good_brand = input("请选择商品品牌：")
if good_brand in("1", "2", "3", "4", "5", "6", "7", "8", "9"):
good_brand = int(good_brand)
break
else:
print("输入不正确，请重新输入！")
good_price = float(input("请输入商品价格："))
JD().add_single_good(good_name, good_cate, good_brand, good_price)
elif num == "2":
break
else:
print("输入错误，请重新输入！")6.update_main方法代码实现
def update_main():
"""修改商品信息功能"""
while True:
Menu.print_update_menu()
num = input("请选择修改功能序号：")
if num == "1":
ids = list()
for data in JD().get_goods_ids():
for id in data:
ids.append(id)
good_id_name = input("请输入要修改商品的编号或名字：")
try:
if int(good_id_name) in ids:
# 表示输入了正确的商品编号
JD().update_single_good(0, good_id_name) # 0表示用户输入的是商品编号,否则表示商品名字
else:
while True:
new_id = input("您输入的商品编号不存在，请重新输入：")
if int(new_id) in ids:
break
JD().update_single_good(0, new_id)
except Exception as e:
JD().update_single_good(e, good_id_name)
elif num == "2":
break
else:
print("输入错误，请重新输入！")7.delete_main方法代码实现
def delete_main():
"""删除商品信息功能"""
while True:
Menu.print_delete_menu()
num = input("请选择删除功能序号：")
if num == "1":
ids = list()
for data in JD().get_goods_ids():
for id in data:
ids.append(id)
print("所有商品信息如下：")
for good in JD().get_goods_id_name():
print(good)
while True:
good_id = input("请输入要删除的商品编号：")
try:
if int(good_id) in ids:
JD().delete_single_good(good_id)
break
else:
print("您输入的商品编号不存在，请重新输入：")
except Exception as e:
print("非法输入", e)
elif num == "2":
temps, count = JD().select_all_goods()
print("一共有%s种商品信息" % count)
for temp in temps:
print(temp)
num = input("1.点错了 2.继续删除：")
if num == "1":
break
elif num == "2":
s = input("数据删除后将无法恢复，确认请输入y：").lower()
if s == "y":
JD().delete_all_goods()
else:
print("输入错误，操作取消中....")
time.sleep(1)
break
elif num == "3":
break
else:
print("输入错误，请重新输入！")8.Menu类代码实现
class Menu(object):
"""界面信息打印显示"""
@staticmethod
def print_main_menu():
print(
"""
*******欢迎来到京东商城(主功能菜单)*******
1.商品查询功能
2.商品添加功能
3.商品修改功能
4.商品删除功能
5.退出程序
"""
)
@staticmethod
def print_select_menu():
print(
"""
*******欢迎来到京东商城(查询功能)*******
0.查询单个商品信息
1.查询所有的商品信息
2.查询商品分类信息
3.查询所有的品牌分类信息
4.返回主功能菜单
"""
)
@staticmethod
def print_add_menu():
print(
"""
*******欢迎来到京东商城(增加功能)*******
1.添加商品信息
2.返回主功能菜单
"""
)
@staticmethod
def print_update_menu():
print(
"""
*******欢迎来到京东商城(修改功能)*******
1.修改单个商品信息
2.返回主功能菜单
"""
)
@staticmethod
def print_delete_menu():
print(
"""
*******欢迎来到京东商城(删除功能)*******
1.删除单个商品信息
2.删除所有的商品信息
3.返回主功能菜单
"""
)
@staticmethod
def print_goods_cates():
print(
"""
******商品分类******
1.台式机
2.平板电脑
3.服务器/工作站
4.游戏本
5.笔记本
6.笔记本配件
7.超级本
8.硬盘
9.光盘
10.显示器
"""
)
@staticmethod
def print_goods_brands():
print(
"""
******商品品牌******
1.ibm
2.华硕
3.宏碁
4.惠普
5.戴尔
6.索尼
7.联想
8.苹果
9.雷神
"""
)
9.JD类代码实现
class JD(object):
def __init__(self):
"""初始化 连接数据库"""
self.conn = connect(host="localhost",
port=3306,
user="root",
password="mysql",
database="jing_dong",
charset="utf8"
)
self.cursors = self.conn.cursor()
def select_single_good(self, find_name):
"""查询单个商品信息"""
count = self.cursors.execute("select * from goods where name like '%s'" % find_name)
if count != 0:
return self.cursors.fetchall(), count
else:
return None
def select_all_goods(self):
"""查询所有商品信息"""
count = self.cursors.execute("select * from goods")
return self.cursors.fetchall(), count
def select_goods_class(self):
"""查询商品分类"""
count = self.cursors.execute("select name from goods_cates")
return self.cursors.fetchall(), count
def select_goods_logo(self):
"""查询商品品牌"""
count = self.cursors.execute("select name from goods_brands")
return self.cursors.fetchall(), count
def add_single_good(self, name, cate, brand, price):
"""添加单个商品信息"""
# sql = ("insert into goods(name,cate_id,brand_id,price)values(%s,%d,%d,%s) " % (name, cate, brand, price))
count = self.cursors.execute("insert into goods (name,cate_id,brand_id,price) values ('%s',%d,%d,%f) " % (name, cate, brand, price))
if count == 1:
print("添加商品信息成功....")
self.conn.commit()
self.cursors.execute("select * from goods where name = '%s'" % name)
print(self.cursors.fetchone())
else:
print("添加商品信息失败....")
# self.cursors.execute("insert into goods()")
def get_goods_ids(self):
"""获取所有商品的id编号"""
self.cursors.execute("select id from goods")
return self.cursors.fetchall()
def get_goods_id_name(self):
"""获取所有商品的编号以名称"""
self.cursors.execute("select id,name from goods order by id")
return self.cursors.fetchall()
@staticmethod
def get_user_update_data():
"""获取用户修改的商品信息"""
flag = True # 设置开关 当用户输入的商品信息项不存在时则为False
data = dict()
index = list()
while True:
print("1.商品名称 2.商品分类 3.商品品牌 4.商品价格")
user_choose = input("请选择要修改的商品信息项：")
if not len(user_choose) > 4 or len(user_choose) < 1:
break
for i in user_choose:
if i == "1":
u_name = input("请输入修改后的商品名称：")
data["name"] = u_name
index.append(i)
elif i == "2":
Menu.print_goods_cates()
try:
u_cate = int(input("请输入修改后的商品分类编号:"))
data["cate_id"] = u_cate
index.append(i)
except Exception as e:
print("您输入的商品分类编号错误", e)
return
elif i == "3":
Menu.print_goods_brands()
try:
u_brand = int(input("请输入修改后的商品品牌编号："))
data["brand_id"] = u_brand
index.append(i)
except Exception as e:
print("您输入的商品品牌编号错误", e)
return
elif i == "4":
try:
u_price = float(input("请输入修改后的商品价格："))
data["price"] = u_price
index.append(i)
except Exception as e:
print("您输入的商品价格错误", e)
return
else:
flag = False
print("您输入的商品信息项目含有非法输入（%s）" % i)
if flag:
return index, data # {'brand_id': 2, 'cate_id': 2, 'name': 'ssss'}
def update_single_good(self, sign, name_id):
"""修改商品信息"""
# 1.根据用户输入的查询条件，获取商品信息并显示到客户窗口上
if 0 == sign:
good_id = name_id
self.cursors.execute("select * from goods where id = '%s'" % good_id)
# 因为在update_main方法中已经对商品编号进行判断，用户输入的商品编号在数据库中能找到才能调用此方法
print(self.cursors.fetchone())
index, data = JD().get_user_update_data()
if index:
for i in index:
if i == "1":
key1 = "name"
count = self.cursors.execute(
"update goods set %s = '%s' where id = '%s'" % (key1, data[key1], good_id))
if count == 1:
print("修改商品名称成功！")
self.conn.commit()
else:
print("修改商品名称失败！")
return
elif i == "2":
key2 = "cate_id"
count = self.cursors.execute(
"update goods set %s = '%s' where id = '%s'" % (key2, data[key2], good_id))
if count == 1:
print("修改商品分类成功！")
self.conn.commit()
else:
print("修改商品分类失败！")
return
elif i == "3":
key3 = "brand_id"
count = self.cursors.execute(
"update goods set %s = '%s' where id = '%s'" % (key3, data[key3], good_id))
if count == 1:
print("修改商品品牌成功！")
self.conn.commit()
else:
print("修改商品品牌失败！")
return
elif i == "4":
key4 = "price"
count = self.cursors.execute(
"update goods set %s = '%s' where id = '%s'" % (key4, data[key4], good_id))
if count == 1:
print("修改商品价格成功！")
self.conn.commit()
else:
print("修改商品价格失败！")
return
# 2.根据用户选择商品修改项对其进行修改，将修改成功后的商品信息展现出来
self.cursors.execute("select * from goods where id = '%s'" % good_id)
print(self.cursors.fetchone())
else:
print("用户未选择")
return
else:
good_name = name_id
count = self.cursors.execute("select * from goods where name = '%s'" % good_name)
good_id = int # 用于保存商品编码，因为编码是唯一不能修改的
if count != 0:
for i in self.cursors.fetchone():
good_id = i
break
index, data = JD().get_user_update_data()
if index:
for i in index:
if i == "1":
key1 = "name"
count = self.cursors.execute(
"update goods set %s = '%s' where name = '%s'" % (key1, data[key1], good_name))
if count == 1:
print("修改商品名称成功！")
self.conn.commit()
else:
print("修改商品名称失败！")
return
elif i == "2":
key2 = "cate_id"
count = self.cursors.execute(
"update goods set %s = '%s' where name = '%s'" % (key2, data[key2], good_name))
if count == 1:
print("修改商品分类成功！")
self.conn.commit()
else:
print("修改商品分类失败！")
return
elif i == "3":
key3 = "brand_id"
count = self.cursors.execute(
"update goods set %s = '%s' where name = '%s'" % (key3, data[key3], good_name))
if count == 1:
print("修改商品品牌成功！")
self.conn.commit()
else:
print("修改商品品牌失败！")
return
elif i == "4":
key4 = "price"
count = self.cursors.execute(
"update goods set %s = '%s' where name = '%s'" % (key4, data[key4], good_name))
if count == 1:
print("修改商品价格成功！")
self.conn.commit()
else:
print("修改商品价格失败！")
return
self.cursors.execute("select * from goods where id = '%s'" % good_id)
print(self.cursors.fetchone())
else:
print("用户未选择")
return
else:
new_name = input("您输入的商品名称不存在，请重新输入：")
self.update_single_good(1, new_name)
def delete_single_good(self, good_id):
"""删除单个商品信息"""
count = self.cursors.execute("delete from goods where id = '%s'" % good_id)
if count == 1:
print("删除商品信息成功！")
self.conn.commit()
else:
print("删除商品信息失败！")
return
def delete_all_goods(self):
"""删除所有商品信息"""
count = self.cursors.execute("truncate table goods")
if count == 0:
print("所有商品信息已全部删除")
def close_database(self):
"""关闭数据库连接对象以及游标对象"""
self.cursors.close()
self.conn.close()五丶完整代码
from pymysql import *
import time
class JD(object):
def __init__(self):
"""初始化 连接数据库"""
self.conn = connect(host="localhost",
port=3306,
user="root",
password="mysql",
database="jing_dong",
charset="utf8"
)
self.cursors = self.conn.cursor()
def select_single_good(self, find_name):
"""查询单个商品信息"""
count = self.cursors.execute("select * from goods where name like '%s'" % find_name)
if count != 0:
return self.cursors.fetchall(), count
else:
return None
def select_all_goods(self):
"""查询所有商品信息"""
count = self.cursors.execute("select * from goods")
return self.cursors.fetchall(), count
def select_goods_class(self):
"""查询商品分类"""
count = self.cursors.execute("select name from goods_cates")
return self.cursors.fetchall(), count
def select_goods_logo(self):
"""查询商品品牌"""
count = self.cursors.execute("select name from goods_brands")
return self.cursors.fetchall(), count
def add_single_good(self, name, cate, brand, price):
"""添加单个商品信息"""
# sql = ("insert into goods(name,cate_id,brand_id,price)values(%s,%d,%d,%s) " % (name, cate, brand, price))
count = self.cursors.execute("insert into goods (name,cate_id,brand_id,price) values ('%s',%d,%d,%f) " % (name, cate, brand, price))
if count == 1:
print("添加商品信息成功....")
self.conn.commit()
self.cursors.execute("select * from goods where name = '%s'" % name)
print(self.cursors.fetchone())
else:
print("添加商品信息失败....")
# self.cursors.execute("insert into goods()")
def get_goods_ids(self):
"""获取所有商品的id编号"""
self.cursors.execute("select id from goods")
return self.cursors.fetchall()
def get_goods_id_name(self):
"""获取所有商品的编号以名称"""
self.cursors.execute("select id,name from goods order by id")
return self.cursors.fetchall()
@staticmethod
def get_user_update_data():
"""获取用户修改的商品信息"""
flag = True # 设置开关 当用户输入的商品信息项不存在时则为False
data = dict()
index = list()
while True:
print("1.商品名称 2.商品分类 3.商品品牌 4.商品价格")
user_choose = input("请选择要修改的商品信息项：")
if not len(user_choose) > 4 or len(user_choose) < 1:
break
for i in user_choose:
if i == "1":
u_name = input("请输入修改后的商品名称：")
data["name"] = u_name
index.append(i)
elif i == "2":
Menu.print_goods_cates()
try:
u_cate = int(input("请输入修改后的商品分类编号:"))
data["cate_id"] = u_cate
index.append(i)
except Exception as e:
print("您输入的商品分类编号错误", e)
return
elif i == "3":
Menu.print_goods_brands()
try:
u_brand = int(input("请输入修改后的商品品牌编号："))
data["brand_id"] = u_brand
index.append(i)
except Exception as e:
print("您输入的商品品牌编号错误", e)
return
elif i == "4":
try:
u_price = float(input("请输入修改后的商品价格："))
data["price"] = u_price
index.append(i)
except Exception as e:
print("您输入的商品价格错误", e)
return
else:
flag = False
print("您输入的商品信息项目含有非法输入（%s）" % i)
if flag:
return index, data # {'brand_id': 2, 'cate_id': 2, 'name': 'ssss'}
def update_single_good(self, sign, name_id):
"""修改商品信息"""
# 1.根据用户输入的查询条件，获取商品信息并显示到客户窗口上
if 0 == sign:
good_id = name_id
self.cursors.execute("select * from goods where id = '%s'" % good_id)
# 因为在update_main方法中已经对商品编号进行判断，用户输入的商品编号在数据库中能找到才能调用此方法
print(self.cursors.fetchone())
index, data = JD().get_user_update_data()
if index:
for i in index:
if i == "1":
key1 = "name"
count = self.cursors.execute(
"update goods set %s = '%s' where id = '%s'" % (key1, data[key1], good_id))
if count == 1:
print("修改商品名称成功！")
self.conn.commit()
else:
print("修改商品名称失败！")
return
elif i == "2":
key2 = "cate_id"
count = self.cursors.execute(
"update goods set %s = '%s' where id = '%s'" % (key2, data[key2], good_id))
if count == 1:
print("修改商品分类成功！")
self.conn.commit()
else:
print("修改商品分类失败！")
return
elif i == "3":
key3 = "brand_id"
count = self.cursors.execute(
"update goods set %s = '%s' where id = '%s'" % (key3, data[key3], good_id))
if count == 1:
print("修改商品品牌成功！")
self.conn.commit()
else:
print("修改商品品牌失败！")
return
elif i == "4":
key4 = "price"
count = self.cursors.execute(
"update goods set %s = '%s' where id = '%s'" % (key4, data[key4], good_id))
if count == 1:
print("修改商品价格成功！")
self.conn.commit()
else:
print("修改商品价格失败！")
return
# 2.根据用户选择商品修改项对其进行修改，将修改成功后的商品信息展现出来
self.cursors.execute("select * from goods where id = '%s'" % good_id)
print(self.cursors.fetchone())
else:
print("用户未选择")
return
else:
good_name = name_id
count = self.cursors.execute("select * from goods where name = '%s'" % good_name)
good_id = int # 用于保存商品编码，因为编码是唯一不能修改的
if count != 0:
for i in self.cursors.fetchone():
good_id = i
break
index, data = JD().get_user_update_data()
if index:
for i in index:
if i == "1":
key1 = "name"
count = self.cursors.execute(
"update goods set %s = '%s' where name = '%s'" % (key1, data[key1], good_name))
if count == 1:
print("修改商品名称成功！")
self.conn.commit()
else:
print("修改商品名称失败！")
return
elif i == "2":
key2 = "cate_id"
count = self.cursors.execute(
"update goods set %s = '%s' where name = '%s'" % (key2, data[key2], good_name))
if count == 1:
print("修改商品分类成功！")
self.conn.commit()
else:
print("修改商品分类失败！")
return
elif i == "3":
key3 = "brand_id"
count = self.cursors.execute(
"update goods set %s = '%s' where name = '%s'" % (key3, data[key3], good_name))
if count == 1:
print("修改商品品牌成功！")
self.conn.commit()
else:
print("修改商品品牌失败！")
return
elif i == "4":
key4 = "price"
count = self.cursors.execute(
"update goods set %s = '%s' where name = '%s'" % (key4, data[key4], good_name))
if count == 1:
print("修改商品价格成功！")
self.conn.commit()
else:
print("修改商品价格失败！")
return
self.cursors.execute("select * from goods where id = '%s'" % good_id)
print(self.cursors.fetchone())
else:
print("用户未选择")
return
else:
new_name = input("您输入的商品名称不存在，请重新输入：")
self.update_single_good(1, new_name)
def delete_single_good(self, good_id):
"""删除单个商品信息"""
count = self.cursors.execute("delete from goods where id = '%s'" % good_id)
if count == 1:
print("删除商品信息成功！")
self.conn.commit()
else:
print("删除商品信息失败！")
return
def delete_all_goods(self):
"""删除所有商品信息"""
count = self.cursors.execute("truncate table goods")
if count == 0:
print("所有商品信息已全部删除")
def close_database(self):
"""关闭数据库连接对象以及游标对象"""
self.cursors.close()
self.conn.close()
class Menu(object):
"""界面信息打印显示"""
@staticmethod
def print_main_menu():
print(
"""
*******欢迎来到京东商城(主功能菜单)*******
1.商品查询功能
2.商品添加功能
3.商品修改功能
4.商品删除功能
5.退出程序
"""
)
@staticmethod
def print_select_menu():
print(
"""
*******欢迎来到京东商城(查询功能)*******
0.查询单个商品信息
1.查询所有的商品信息
2.查询商品分类信息
3.查询所有的品牌分类信息
4.返回主功能菜单
"""
)
@staticmethod
def print_add_menu():
print(
"""
*******欢迎来到京东商城(增加功能)*******
1.添加商品信息
2.返回主功能菜单
"""
)
@staticmethod
def print_update_menu():
print(
"""
*******欢迎来到京东商城(修改功能)*******
1.修改单个商品信息
2.返回主功能菜单
"""
)
@staticmethod
def print_delete_menu():
print(
"""
*******欢迎来到京东商城(删除功能)*******
1.删除单个商品信息
2.删除所有的商品信息
3.返回主功能菜单
"""
)
@staticmethod
def print_goods_cates():
print(
"""
******商品分类******
1.台式机
2.平板电脑
3.服务器/工作站
4.游戏本
5.笔记本
6.笔记本配件
7.超级本
8.硬盘
9.光盘
10.显示器
"""
)
@staticmethod
def print_goods_brands():
print(
"""
******商品品牌******
1.ibm
2.华硕
3.宏碁
4.惠普
5.戴尔
6.索尼
7.联想
8.苹果
9.雷神
"""
)
def select_main():
"""查询商品信息功能"""
while True:
Menu.print_select_menu()
num = input("请选择查询功能序号：")
if num == "0":
find_name = input("请输入要查找商品名字：")
find_name = "%" + find_name + "%"
result, count = JD().select_single_good(find_name)
if result is not None:
print("一共查询到%s条记录" % count)
for res in result:
print(res)
else:
print("对不起！您输入的商品不存在...")
elif num == "1":
temps, count = JD().select_all_goods()
print("一共查询到%s个商品" % count)
for temp in temps:
print(temp)
elif num == "2":
result, count = JD().select_goods_class()
print("一共查询到%s类商品" % count)
print(result)
elif num == "3":
result, count = JD().select_goods_logo()
print("一共查询到有%s种品牌" % count)
print(result)
elif num == "4":
break
else:
print("输入不正确，请重新输入!")
def add_main():
"""添加商品信息功能"""
while True:
Menu.print_add_menu()
num = input("请选择增加功能序号：")
if num == "1":
good_name = input("请输入商品名字：")
while True:
Menu.print_goods_cates()
good_cate = input("请选择商品分类：")
if good_cate in("1", "2", "3", "4", "5", "6", "7", "8", "9", "10"):
good_cate = int(good_cate)
break
else:
print("输入不正确，请重新输入！")
while True:
Menu.print_goods_brands()
good_brand = input("请选择商品品牌：")
if good_brand in("1", "2", "3", "4", "5", "6", "7", "8", "9"):
good_brand = int(good_brand)
break
else:
print("输入不正确，请重新输入！")
good_price = float(input("请输入商品价格："))
JD().add_single_good(good_name, good_cate, good_brand, good_price)
elif num == "2":
break
else:
print("输入错误，请重新输入！")
def update_main():
"""修改商品信息功能"""
while True:
Menu.print_update_menu()
num = input("请选择修改功能序号：")
if num == "1":
ids = list()
for data in JD().get_goods_ids():
for id in data:
ids.append(id)
good_id_name = input("请输入要修改商品的编号或名字：")
try:
if int(good_id_name) in ids:
# 表示输入了正确的商品编号
JD().update_single_good(0, good_id_name) # 0表示用户输入的是商品编号,否则表示商品名字
else:
while True:
new_id = input("您输入的商品编号不存在，请重新输入：")
if int(new_id) in ids:
break
JD().update_single_good(0, new_id)
except Exception as e:
JD().update_single_good(e, good_id_name)
elif num == "2":
break
else:
print("输入错误，请重新输入！")
def delete_main():
"""删除商品信息功能"""
while True:
Menu.print_delete_menu()
num = input("请选择删除功能序号：")
if num == "1":
ids = list()
for data in JD().get_goods_ids():
for id in data:
ids.append(id)
print("所有商品信息如下：")
for good in JD().get_goods_id_name():
print(good)
while True:
good_id = input("请输入要删除的商品编号：")
try:
if int(good_id) in ids:
JD().delete_single_good(good_id)
break
else:
print("您输入的商品编号不存在，请重新输入：")
except Exception as e:
print("非法输入", e)
elif num == "2":
temps, count = JD().select_all_goods()
print("一共有%s种商品信息" % count)
for temp in temps:
print(temp)
num = input("1.点错了 2.继续删除：")
if num == "1":
break
elif num == "2":
s = input("数据删除后将无法恢复，确认请输入y：").lower()
if s == "y":
JD().delete_all_goods()
else:
print("输入错误，操作取消中....")
time.sleep(1)
break
elif num == "3":
break
else:
print("输入错误，请重新输入！")
def main():
"""主功能菜单"""
while True:
Menu.print_main_menu()
num = input("请选择功能序号：")
if num == "1":
select_main()
elif num == "2":
add_main()
elif num == "3":
update_main()
elif num == "4":
delete_main()
elif num == "5":
JD().close_database()
print("程序正在退出，请稍候....")
time.sleep(2)
break
else:
print("您的输入不正确，请重新输入！")
if __name__ == '__main__':
main()