注意：程序中涉及到文件路径的，可以酌情修改电脑本地路径

这是我的Python语言的课程设计作业，代码有很多不足，望大佬不吝赐教！

1.框图及编程思路

2.程序执行

2.1主界面

2.2登录后界面

2.3注册信息保存格式

2.4文章保存格式

3.代码

''' Python面向对象实现简单博客管理系统
    要求：1.实现用户登录、注册界面
          2.实现对博客文章的增、删、查、改等功能
          3.博客文章保存到文件
          4.用户信息保存到json文件中
'''
import time
import os
import json
import datetime
class Main_interface():
    ''' 主界面 '''
    def __init__(self):
        self.user = User()
        self.article = Article()

    def welcome_interface(self):
        ''' 欢迎界面 '''
        print("欢迎使用博客管理系统！")
        print("1.登录")
        print("2.注册")
        print("3.退出")
        user = input("请输入序号：")
        if user == '1':
            self.user.login()
        elif user == '2':
            self.user.register()
        else:
            exit()

class After_login_interface():
    ''' 登录后界面类'''
    def __init__(self):
        # 实例化Article
        self.article = Article()

    def after_login(self):
        ''' 登录后界面 '''
        print("1.写文章")
        print("2.查看文章")
        print("3.全部文章")
        print("4.修改文章")
        print("5.删除文章")
        print("0.退出系统")
        user = input("请输入序号:")
        if user == '1':
            self.article.add_article()
        elif user == '2':
            self.article.find_one_articel()
        elif user == '3':
            self.article.show_all_article()
        elif user == '4':
            self.article.modify_article()
        elif user == '5':
            self.article.del_article()
        elif user == '0':
            exit()
        else:
            print("请输入正确的序号：")
            self.after_login()

class User():
    ''' 用户类 '''
    def __init__(self):
        self.after_login_interface = After_login_interface()
        self.info_dict = {
    }  # 以字典形式临时存放用户注册信息，便于随后存到json文件中
        self.username = ''
        self.name_info = []
        self.password = ''

    def login(self):
        ''' 用户登录 '''
        print("正在登录...")
        self.username = input("请输入用户名:")
        with open(r"H:\untitled\Spider\BlogData\user_info.json", 'r') as f:
            for info in f.readlines():
                try:
                    self.name_info.append(str(json.loads(info).keys()))
                    self.password = str(json.loads(info)[self.username])
                except:
                    pass
        if str("dict_keys(['" + self.username + "'])") in self.name_info:
            password = input("请输入密码:")
            if password == self.password:
                print("登陆成功!")

                self.after_login_interface.after_login()
            else:
                print("密码错误!")
        else:
            print('用户名不存在!')
            self.re_login()

    def re_login(self):
        '''重新登录 '''

        user_desicion = input("是否注册(1.注册帐号 2.重新登录 3.退出系统)")
        if user_desicion == '1':
            self.register()
        elif user_desicion == '2':
            self.login()
        elif user_desicion == '3':
            exit()
        else:
            print('输入有误，请重新输入！')
            self.re_login()

    def register(self):
        ''' 用户注册 '''
        print("正在注册...")
        self.username = input("请输入您想要使用的用户名：")
        with open(r"H:\untitled\Spider\BlogData\user_info.json", 'r') as f:
            for info in f.readlines():
                try:
                    self.name_info.append(str(json.loads(info).keys()))
                except:
                    pass
        #print(str("dict_keys([" + "'" + self.username + "'" + "])"))
        if str("dict_keys(['" + self.username + "'])") in self.name_info:
            print('您输入的用户名已存在，请重新输入：')
            self.register()
        else:
            # self.info_dict['self.username'] = self.username  # 将用户输入的self.username存到字典中
            password = input("请输入您想要使用的密码：")
            verify_password = input("请再次确认密码：")
            if password == verify_password:
                print("注册成功！")
                # 注册成功后创建一个名为self.username的文件夹
                try:
                    if not os.path.exists("H://untitled//Spider//BlogData//" + self.username + "//"):
                        os.mkdir("H://untitled//Spider//BlogData//" + self.username + "//")
                except:
                    print("个人文件夹创建失败")
                self.info_dict[self.username] = password # 将用户输入的password存到字典
                # print(self.info_dict)
                json_str = json.dumps(self.info_dict) # 将用户输入的self.username和password转换为json格式并存入json文件
                with open(r"H:\untitled\Spider\BlogData\user_info.json", 'a+') as json_file:
                    json_file.write(json_str + '\n')
                    json_file.close()

                print("正在返回登录界面，请稍后...")
                time.sleep(3)
                self.login()
            else:
                print("两次输入的密码不相同，注册失败!")
                print("正在返回注册界面,请稍后...")
                time.sleep(3)
                self.register()

class Article():
    ''' 博客文章类 '''
    def __init__(self):
        self.username = ''
        self.article_list = []
    def add_article(self):
        ''' 添加文章 -- 写文章 '''

        self.username = input("请验证您的用户名：")
        title = input("请输入文章名：")
        file_path = "H://untitled//Spider//BlogData//" + self.username + "//"
        if title  in os.listdir(file_path):
            print('文章已存在！请重新输入')
            self.add_article()
        else:
            try:
                with open("H://untitled//Spider//BlogData//" + self.username + "//"+ title + ".txt", 'w') as file:
                    file.write('标题:' + title )
                    file.write('时间:' + datetime.datetime.now().strftime('%Y-%m-%d'))
                    content = input("请输入文章内容：")
                    file.write('正文：'+ content)
                    file.close()
                    print('文章已保存！')
            except:
                print("用户名验证失败！")
            user_decision = input("是否继续写文章(1.继续 2.退出系统)")
            if user_decision == '1':
                self.add_article()
            else:
                exit()

    def find_one_articel(self):
        ''' 查找文章 '''
        print("正在调用查找一篇文章方法")

        self.show_all_article()

    def show_all_article(self):
        ''' 展示所有文章 '''
        print("正在调用展示所有文章方法")
        self.username = input("请验证您的用户名：")
        file_path = "H://untitled//Spider//BlogData//" + self.username + "//"
        self.article_list = os.listdir(file_path)
        print("*" * 20)
        if len(self.article_list) == 0:
            print("您还没有写文章！")
            exit()
        for article_name in self.article_list:
            print(article_name)
        print("*" * 20)
        user_decision = input("输入文章名：") + '.txt'
        if user_decision in self.article_list:
            with open("H://untitled//Spider//BlogData//" + self.username + "//" + user_decision, 'r') as f:
                for text in f.readlines():
                    print(text)
        else:
            print("您查找的文章不存在！")

    def del_article(self):
        ''' 删除文章 '''
        print("正在调用删除文章方法")
        self.username = input("请验证您的用户名：")
        file_path = "H://untitled//Spider//BlogData//" + self.username + "//"
        self.article_list = os.listdir(file_path)
        print("*" * 20)
        if len(self.article_list) == 0:
            print("您还没有写文章！")
        for article_name in self.article_list:
            print(article_name)
        print("*" * 20)
        user_decision = input("请输入要删除的文章名:") + '.txt'
        del_path = "H://untitled//Spider//BlogData//" + self.username + "//" + user_decision
        os.remove(del_path)
        if user_decision + '.txt' not in self.article_list:
            print("删除成功！")
        else:
            print('删除失败！')

    def modify_article(self):
        ''' 修改文章 '''
        print("正在调用修改文章方法")
        self.username = input("请验证您的用户名：")
        file_path = "H://untitled//Spider//BlogData//" + self.username + "//"
        self.article_list = os.listdir(file_path)
        print("*" * 20)
        if len(self.article_list) == 0:
            print("您还没有写文章！")
        for article_name in self.article_list:
            print(article_name)
        print("*" * 20)
        user_decision = input("请输入要修改的文章名:") + '.txt'
        change_path = "H://untitled//Spider//BlogData//" + self.username + "//" + user_decision
        user_selection = input("1.追加内容 2.覆盖内容")
        if user_selection == '1':
            text = input("请输入追加内容：")
            with open(change_path, 'a+') as fp:
                fp.write(text)
                fp.close()
        elif user_selection == '2':
            text = input("请输入覆盖内容：")
            with open(change_path, 'w') as fp:
                fp.write(text)
                fp.close()

def make_dirs():
    ''' 创建文件 '''
    file = os.path.exists('BlogData')
    if not file:
        os.makedirs('BlogData')
        print("创建成功，博客系统数据将保存在'BlogData'文件夹")
        print('请重新启动程序！')
        exit()
    else:
        print("文件已存在，博客系统数据将保存在'BlogData'文件夹")

make_dirs()

MI = Main_interface()
MI.welcome_interface()