一、要求
二、思路
1.购物类buy
接收 信用卡类 的信用卡可用可用余额，
返回消费金额
2.信用卡（ATM）类
接收上次操作后，信用卡可用余额，总欠款，剩余欠款，存款
其中：1.每种交易类型不单独处理金钱，也不单独记录流水账，每种交易类型调用处理金钱的函数（传入交易类型，交易金额）
2.处理金钱的函数，调用配置文件中关于每种交易类型的加减钱和利率
返回本次操作后信用卡可用余额，总欠款，剩余欠款，存款
3.客户端
银行管理员注册登陆
普通用户注册登陆
发送需求：注册、登陆、交易类型、交易金额
4.服务器端
调用购物类，创建购物对象(购物接口)
调用信用卡（ATM）类，处理还款，转账等操作，对利息按月记录，写入文件
5.定时任务
定时执行程序，以计算利息。
三、代码
3.1配置文件
import os BASE_DIR = os.path.dirname(os.path.dirname(__file__)) #配置文件的上层目录 DB_DIR=os.path.join(BASE_DIR,'db') #数据文件夹 ADMIN=os.path.join(DB_DIR,'admin') ALL_USERS=os.path.join(DB_DIR,'allusrs') A=os.path.join(BASE_DIR,'db','s') LOG=os.path.join(BASE_DIR,'log') TRANSACTION={ 'repay':{'action':'plus','interest':0}, #还款 'withdraw':{'action':'minus','interest':0.05},#取现 'transfer':{'action':'minus','interest':0.05},#转账 'consume':{'action':'minus','interest':0},#消费 'saving':{'action':'plus','interest':0} #存款 }
3.2公共类
3.2.1购物类
class buy: goods=[ {"name": "电脑", "price": 1999}, {"name": "鼠标", "price": 10}, {"name": "游艇", "price": 20}, {"name": "美女", "price": 998}, ] def __init__(self,money,consumption,shopping_cart,): self.money=money self.consumption=consumption self.shopping_cart=shopping_cart def gouwu(self): #购物模块 print('您的当前余额为：%d' %self.money) num=int(input('请输入商品序号：')) num-=1 if self.goods[num]["name"] in self.shopping_cart.keys(): #goods[num]["name"]取商品名 self.shopping_cart[self.goods[num]["name"]]['n']+=1 #商品数量+1 else: self.shopping_cart[self.goods[num]["name"]]={"price":self.goods[num]["price"],'n':1,} # 创建购物车字典 {keys{"price"：价格,数量：1}} self.money-=self.shopping_cart[self.goods[num]["name"]]["price"]*self.shopping_cart[self.goods[num]["name"]]['n'] #单价*数量 self.consumption+=self.shopping_cart[self.goods[num]["name"]]["price"]*self.shopping_cart[self.goods[num]["name"]]['n'] def yichu(self): #移除购物车模块 c=int(input(' 请输入0/1选择是否移除购物车商品, 移除请输入1:')) if c==1: e=int(input(' 请输入要移除的商品序号:')) d=self.goods[e-1] if d in self.shopping_cart.keys(): #判断要移除的商品是否在购物车内 self.shopping_cart.remove(d) #移除商品 self.money=self.money+self.goods[self.goods.index(d)]["price"] #余额增加 self.consumption=self.consumption-self.goods[self.goods.index(d)]["price"] #消费总额减少 else: print('商品不存在') def chongzhi(self): #充值模块 pay=int(input('请输入充值金额')) self.money=self.money+pay print('您的当前余额为：%d' % self.money) #显示当前余额 def main(self): print('商品清单：') for m,n in enumerate(self.goods,1): print(m) for v in n.values(): print(v) print('=============') #消费总额清零 self.consumption=0 buy=True #定义默认一直购物 while buy: price=0 #定义初始价格 b=1 #定义默认不退出购物或充值状态 if self.money>=price: #消费模块；金钱大于货物价格时，才能开始购物 while self.money>=price: #计价模块，有钱就可以一直购物 self.gouwu() #移除购物车商品模块 self.yichu() if self.money>=0: print('您的当前余额为：%d' %self.money) #显示当前余额 b=int(input(' 请输入0/1选择是否继续购物, 购物请输入1:')) if b==0: # break #退出计价模块 if b==0: #如果不购物 break #不购物退出整个购物程序 #充值模块 else: while self.money<price: #金钱不足，可多次充钱，直到能买得起货物 a=int(input(' 您的余额不足，请输入0/1选择是否充值，充值请输入1:')) if a==1: self.chongzhi() else: break #退出充值模块 if a==0: break #不充值退出程序 #打印购物车商品名、商品价格、消费总额、余额 print('您的消费清单为：') for m,n in self.shopping_cart.items(): print(m,n['price'],n['n']) #打印消费清单 print('=============') print('您的当前余额为：%d,您的消费总额为：%d' % (self.money,self.consumption) ) #打印消费总额 return self.consumption
3.2.2 信用卡ATM类
class Atm: credit=15000 #信用卡额度 def __init__(self,balance,debt,remaining_debt,interest,saving,id): self.id=id #信用卡id self.balance=balance #信用卡可用金额 self.debt=debt #总欠款 self.remaining_debt=remaining_debt #剩余欠款 self.interest=interest #手续费 self.saving=saving #存款 self.now_time=time.strftime("%Y-%m-%d %H:%M:%S") self.now_data=time.strftime("%Y-%m") self.struct_time=time.gmtime(time.time()) if self.struct_time.tm_mday>22: self.now_data=self.struct_time.tm_year+'-'+str(int(self.struct_time.tm_mon)+1) def account_info(self):#打印账户信息 return '账户id%s 信用卡额度%s;信用卡可用金额%s;剩余欠款%s;'%(self.id,self.credit,self.balance,self.remaining_debt,) def ret_account_info(self): return [self.id,self.credit,self.balance,self.debt,self.remaining_debt,self.interest] def repay(self,amount):#还款 self.handel_money('repay',amount) def withdraw(self,amount): #取现 self.handel_money('withdraw',amount) def transfer(self,amount): #转账 self.handel_money('transfer',amount) def consume(self,amount): #消费 self.handel_money('consume',amount) def saves(self,amount): self.handel_money('saving',amount) def transaction(self,a,amount): dic={ '1':self.repay, '2':self.withdraw, '3':self.transfer, '4':self.consume, '5':self.saves } print("debug: a:",type(a),"amount:",type(amount)) print(a) print(dic[a]) print(dic["5"]) dic[a](amount) print("end debug") def handel_money(self,transaction,amount): #交易类型， amount=int(amount) interest=amount*settings.TRANSACTION[transaction]['interest'] #手续费计算 if settings.TRANSACTION[transaction]['action']=='plus': if amount<=self.remaining_debt: self.remaining_debt-=amount self.balance+=amount else: self.balance+=self.remaining_debt self.remaining_debt=0 self.saving+=amount-self.remaining_debt else: if self.saving<amount: self.saving=0 a=amount-self.saving self.balance-=a+interest-self.saving # self.debt+=amount+interest self.remaining_debt+=a+interest a='time:%s id:%s transaction: %s amount:%s interest %s n'%(self.now_time,self.id,transaction,amount,interest) print(a) mulu=os.path.join(settings.ALL_USERS,self.id) path_name_liushui=os.path.join(mulu,str(self.id)+'name_liushui',str(self.now_data)) with open(path_name_liushui,'a')as f: #记录流水信息 f.write(a) s=[self.balance,self.debt,self.remaining_debt,self.interest,self.saving,] #更新基本信息 path_name_base=os.path.join(mulu,str(self.id)+'name_base') pickle.dump(s,open(path_name_base,'wb'))
3.3服务器端：
#!/usr/bin/env python # -*- coding: utf-8 -*- import sys,os import hashlib import pickle import time import socketserver sys.path.append(os.path.dirname(os.path.dirname(__file__))) from config import settings from lib import modules from lib.modules import * class Myserver(socketserver.BaseRequestHandler): def md5(self,pwd): ''' 对密码进行加密 :param pwd: 密码 :return: ''' hash=hashlib.md5(bytes('xx7',encoding='utf-8')) hash.update(bytes(pwd,encoding='utf-8')) return hash.hexdigest() def login(self,usrname,pwd,x): ''' 登陆 :param usrname: 用户名 :param pwd: 密码 :return:是否登陆成功 ''' conn=self.request if x=='1': path_name_pwd=os.path.join(settings.ADMIN,usrname) else: mulu=os.path.join(settings.ALL_USERS,usrname) path_name_pwd=os.path.join(mulu,usrname+'name_pwd') s=pickle.load(open(path_name_pwd,'rb')) if usrname in s: if s[usrname]==self.md5(pwd): #和加密后的密码进行比较 return True else: return False else: return False def regist(self,usrname,pwd,x): ''' 注册 :param usrname: 用户名 :param pwd: 密码 :return:是否注册成功 ''' conn=self.request if x=='1': mulu=os.path.join(settings.ADMIN,usrname) else: mulu=os.path.join(settings.ALL_USERS,usrname) if os.path.exists(mulu): return False else: os.mkdir(mulu) s={} s[usrname]=self.md5(pwd) path_name_pwd=os.path.join(mulu,usrname+'name_pwd') pickle.dump(s,open(path_name_pwd,'wb')) path_name_base=os.path.join(mulu,usrname+'name_base') pickle.dump([15000,{},0,0,0],open(path_name_base,'wb')) path_name_liushui=os.path.join(mulu,usrname+'name_liushui') os.mkdir(path_name_liushui) return True def user_identity_authentication(self,usrname,pwd,ret,x): ''' 判断注册和登陆，并展示用户的详细目录信息，支持cd和ls命令 :return: ''' conn=self.request if ret=='1': r=self.login(usrname,pwd,x) if r: conn.sendall(bytes('y',encoding='utf-8')) else: conn.sendall(bytes('n',encoding='utf-8')) elif ret=='2': # print(usrname,pwd) if x=='1': r=self.regist(usrname,pwd,x) else: #用户注册 s=[0,1] pickle.dump(s,open(settings.A,'wb')) while True: ret=pickle.load(open(settings.A,'rb')) if ret[0]==0: time.sleep(30) continue elif ret[0]==1 or ret[0]==2: break #默认值已更改，银行管理员已操作 if ret[0]==1: #如果管理员同意 r=self.regist(usrname,pwd,x) else: r=0 s=[0,0] pickle.dump(s,open(settings.A,'wb')) if r: conn.sendall(bytes('y',encoding='utf-8')) else: conn.sendall(bytes('n',encoding='utf-8')) def interactive(self,usrname): #进行交互 conn=self.request while True: c=conn.recv(1024) #接收用户交互选项 r=str(c,encoding='utf-8') mulu=os.path.join(settings.ALL_USERS,usrname) path_name_base=os.path.join(mulu,usrname+'name_base') s=pickle.load(open(path_name_base,'rb')) #打印账户信息 obj=modules.Atm(s[0],s[1],s[2],s[3],s[4],usrname) #Atm对象 a=obj.account_info() #接收账户信息 conn.sendall(bytes(a,encoding='utf-8')) b=obj.ret_account_info() if r== '4': buy_obj=modules.buy(b[2],0,{}) amount=buy_obj.main() elif r=='q': break else: s=conn.recv(1024) amount=str(s,encoding='utf-8') obj.transaction(r,amount) pass def handle(self): conn=self.request x=conn.recv(1024) x=str(x,encoding='utf-8') conn.sendall(bytes('收到用户类别',encoding='utf-8')) while True: if x=='1' or x=='2': b=conn.recv(1024) ret=str(b,encoding='utf-8') conn.sendall(bytes('b ok',encoding='utf-8')) c=conn.recv(1024) r=str(c,encoding='utf-8') usrname,pwd=r.split(',') print(usrname,pwd) self.user_identity_authentication(usrname,pwd,ret,x) #登陆或注册验证 if x=='2':#普通用户身份验证成功后 self.interactive(usrname) pass break elif x=='q': break if __name__=='__main__': sever=socketserver.ThreadingTCPServer(('127.0.0.1',9999),Myserver) sever.serve_forever()
3.4 用户端
#!/usr/bin/env python # -*- coding: utf-8 -*- ''' 本程序作为用户或银行管理员的入口，其中c=1代表银行管理员，c=2代表普通用户 ''' import pickle import sys import time import os import socket sys.path.append(os.path.dirname(os.path.dirname(__file__))) from config import settings from lib import * from lib.modules import * def login(usrname,pwd): ''' 登陆 :param usrname:用户名 :param pwd:密码 :return:是否登陆成功 ''' obj.sendall(bytes(usrname+','+pwd,encoding='utf-8')) ret=obj.recv(1024) r=str(ret,encoding='utf-8') if r=='y': return 1 else: return 0 def regist(usrname,pwd,x): ''' 注册 :param usrname:用户名 :param pwd:密码 :return:是否注册成功 ''' obj.sendall(bytes(usrname+','+pwd,encoding='utf-8')) ret=obj.recv(1024) r=str(ret,encoding='utf-8') if r=='y': return 1 else: return 0 def user_identity_authentication(usrname,pwd,x): ''' 选择登陆或注册，展示用户的详细目录信息，支持cd和ls命令 :return: ''' a=input('请选择1.登陆 2.注册') obj.sendall(bytes(a,encoding='utf-8')) obj.recv(1024) if a=='1': ret=login(usrname,pwd) if ret: print('登陆成功') return 1 else: print('用户名或密码错误') return 0 elif a=='2': ret=regist(usrname,pwd,x) if ret: print('注册成功') return 1 else: print('用户名已存在或银行管理员拒绝') return 0 def main(x): usrname=input('请输入用户名') pwd=input('请输入密码') if user_identity_authentication(usrname,pwd,x): #如果验证身份成功 if x=='1': #处理用户注册信息 while True: s=pickle.load(open(settings.A,'rb')) if s[1]==0: time.sleep(30) continue elif s[1]==1: while True: a=input('用户请求注册，输入1同意，2拒绝') if a=='1': s=[1,0] pickle.dump(s,open(settings.A,'wb')) break elif a=='2': s=[2,0] pickle.dump(s,open(settings.A,'wb')) break else: print('输入有误') break else: #普通用户登陆后 interactive() #进行交互 def interactive(): while True: a=input('请选择 1.还款 2.取现 3.转账 4.消费 5.存钱 q退出') obj.sendall(bytes(a,encoding='utf-8')) r=obj.recv(1024) #接收账户信息 ret=str(r,encoding='utf-8') print(ret) if a !='4'and a !='q': b=input('请输入金额') obj.sendall(bytes(b,encoding='utf-8')) elif a=='q': break obj=socket.socket() #创建客户端socket对象 obj.connect(('127.0.0.1',9999)) while True: x=input('请选择1.银行管理员 2.用户 q、退出') obj.sendall(bytes(x,encoding='utf-8')) obj.recv(1024) #确认收到用户类别 if x=='1' or x=='2': main(x) break elif x=='q': break else: print('输入有误请重新输入') obj.close()
3.5定时任务
#!/usr/bin/env python # -*- coding:utf-8 -*- import os,sys import json,pickle import time sys.path.append(os.path.dirname(os.path.dirname(__file__))) from config import settings def main(): card_list = os.listdir(settings.ALL_USERS) for card in card_list: basic_info = pickle.load(open(os.path.join(settings.ALL_USERS, card, card+'name_base'))) struct_time = time.localtime() # 循环账单列表，为每月的欠款计息。并写入到当月账单中 for item in basic_info['debt']: interest = item['total_debt'] * 0.0005 if basic_info[4] >= interest: basic_info[4] -= interest else: temp = interest - basic_info[4] basic_info[4]=0 basic_info[0] -= temp pickle.dump( basic_info, open(os.path.join(settings.ALL_USERS, card, card+'name_base'),'w') ) # 如果当前等于10号(9号之前) # 当前余额为负值，则将值添加到账单列表中，开始计息，同时，本月可用额度恢复。 date = time.strftime("%Y-%m-%d") if struct_time.tm_mday == 11 and basic_info[2]>0: dic = {'date': date, "total_debt": basic_info[2], "balance_debt": basic_info[2], } basic_info[1].append(dic) # 恢复可用额度 basic_info[0] = 15000 pickle.dump( basic_info, open(os.path.join(settings.ALL_USERS, card, card+'name_base'),'w') ) def run(): main()
以上就是用python开发网上商城信用卡系统，需要的同学可以参考下。
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