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< h1 id = "基于python语言的BIBA模型图形界面实现" > < a href = "#基于python语言的BIBA模型图形界面实现" class = "headerlink" title = "基于python语言的BIBA模型图形界面实现" > < / a > 基于python语言的BIBA模型图形界面实现< / h1 > < h2 id = "一、实验目的：" > < a href = "#一、实验目的：" class = "headerlink" title = "一、实验目的：" > < / a > 一、实验目的：< / h2 > < ol >
< li > < strong > 查阅资料， < / strong > < / li >
< li > < strong > 通过编程实现基于biba模型的完整性访问控制， < / strong > < / li >
< li > < strong > 使用python语言实现， < / strong > < / li >
< / ol >
< hr >
< h2 id = "二、实验环境：" > < a href = "#二、实验环境：" class = "headerlink" title = "二、实验环境：" > < / a > 二、实验环境：< / h2 > < ul >
< li > 操作系统： < / li >
< li > 工具版本： ， < / li >
< / ul >
< hr >
< h2 id = "三、实验原理：" > < a href = "#三、实验原理：" class = "headerlink" title = "三、实验原理：" > < / a > 三、实验原理：< / h2 > < h4 id = "1-什么是安全模型" > < a href = "#1-什么是安全模型" class = "headerlink" title = "1. 什么是安全模型" > < / a > 1. 什么是安全模型< / h4 > < ul >
< li > 系统的元素 < blockquote >
< p > 具有行为能力的主体< br > 不具有行为能力的客体< / p >
< / blockquote >
< / li >
< li > 系统的操作行为< blockquote >
< p > 可以执行的命令：读、写、执行< / p >
< / blockquote >
< / li >
< li > 对系统行为的约束方式< blockquote >
< p > 对行为的控制策略< / p >
< / blockquote >
< / li >
< li > 模型从抽象层次规定了系统行为和约束行为的方式< / li >
< li > 模型往往用状态来表示< blockquote >
< p > 系统行为所依赖的环境< br > 行为对系统产生的效果< / p >
< / blockquote >
< h4 id = "2-biba完整性模型： > < a href = "#2-biba完整性模型： class = "headerlink" title = "2. biba完整性模型： > < / a > 2. biba完整性模型： < / h4 > < ul >
< li > 完整性威胁问题< blockquote >
< p > 完整性的威胁就是一个子系统在初始时刻认为不正常的修改行为；< br > 来源：内部& 外部；< br > 类型：直接& 间接< / p >
< / blockquote >
< / li >
< / ul >
< / li >
< / ul >
< table >
< thead >
< tr >
< th > 外部的直接< / th >
< th > 外部的间接< / th >
< th > 内部的直接< / th >
< th > 内部的间接< / th >
< / tr >
< / thead >
< tbody >
< tr >
< td > 外部系统恶意地篡改另一个系统的数据或程序< / td >
< td > 一个外部系统插入恶意的子程序< / td >
< td > 修改自己的代码< / td >
< td > 修改自己的指针< / td >
< / tr >
< / tbody >
< / table >
< ul >
< li > biba模型的完整性定义< blockquote >
< p > 完整性级别高的实体对完整性低的实体具有完全的支配性，反之如果一个实体对另一个实体具有完全的控制权，说明前者完整性级别更高，这里的实体既可以是主体也可以是客体。< br > 完整性级别和可信度有密切的关系，完整级别越高，意味着可信度越高。< / p >
< / blockquote >
< / li >
< li > biba模型的规则 < / li >
< / ul >
< ul >
< li style = "list-style: none" > < input type = "checkbox" > 对于写和执行操作，有如下规则：< blockquote >
< p > < strong > 写规则控制< / strong > < br > 当且仅当主体S的完整性级别大于或等于客体O的完整性级别时， < strong > 上写< / strong > 。< br > < strong > 执行操作控制< / strong > < br > 当且仅当主体S2的完整性级别高于或等于S1,主体S1可以执行主体S2。 < / p >
< / blockquote >
< / li >
< li style = "list-style: none" > < input type = "checkbox" > 关于读操作，有不同的控制策略：< blockquote >
< p > < strong > 低水标模型< / strong > < br > 任意主体可以读任意完整性级别的客体，但是如果主体读完整性级别比自己低的客体时，主体的完整性级别将为客体完整性级别，否则，主体的完整性级别保持不变。< br > < strong > 环模型< / strong > < br > 不管完整性级别如何，任何主体都可以读任何客体< br > < strong > 严格完整性模型< / strong > < br > 这个模型对读操作是根据主客体的完整性级别严格控制的，即只有完整性级别低或相等的主体才可以读完整性级别高的客体，称为< strong > 下读< / strong > < / p >
< / blockquote >
< / li >
< / ul >
< p > < strong > 一般都是指毕巴严格完整性模型，总结来说是上写、下读< / strong > < / p >
< hr >
< h2 id = "四、实验内容：" > < a href = "#四、实验内容：" class = "headerlink" title = "四、实验内容：" > < / a > 四、实验内容：< / h2 > < h3 id = "1-用户登录实现" > < a href = "#1-用户登录实现" class = "headerlink" title = "1. 用户登录实现" > < / a > 1. 用户登录实现< / h3 > < p > < strong > 核对用户输入的账户密码与存储的是否匹配< / strong > < / p >
< p > < img src = "https://github.com/Cool-Y/BIBA-model/blob/master/img/login.PNG" alt = "login" > < / p >
< ul >
< li > 从用户输入框获取账户和密码< / li >
< li > 检查输入信息是否合法（为空）< / li >
< li > 从password.txt中获取， < / li >
< li > 检查输入的账户是否存在< / li >
< li > 若存在，检查对应的密码是否正确< / li >
< li > < p > 若正确，判断是管理员还是普通用户，并跳转相应的界面< / p >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < span class = "line" > 20< / span > < br > < span class = "line" > 21< / span > < br > < span class = "line" > 22< / span > < br > < span class = "line" > 23< / span > < br > < span class = "line" > 24< / span > < br > < span class = "line" > 25< / span > < br > < span class = "line" > 26< / span > < br > < span class = "line" > 27< / span > < br > < span class = "line" > 28< / span > < br > < span class = "line" > 29< / span > < br > < span class = "line" > 30< / span > < br > < span class = "line" > 31< / span > < br > < span class = "line" > 32< / span > < br > < span class = "line" > 33< / span > < br > < span class = "line" > 34< / span > < br > < span class = "line" > 35< / span > < br > < span class = "line" > 36< / span > < br > < span class = "line" > 37< / span > < br > < span class = "line" > 38< / span > < br > < span class = "line" > 39< / span > < br > < span class = "line" > 40< / span > < br > < span class = "line" > 41< / span > < br > < span class = "line" > 42< / span > < br > < span class = "line" > 43< / span > < br > < span class = "line" > 44< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > checkPass< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > nameIn = self.lineEdit.text()< / span > < br > < span class = "line" > passwdIn = self.lineEdit_2.text()< / span > < br > < span class = "line" > md5 = hashlib.md5()< / span > < br > < span class = "line" > md5.update(passwdIn.encode(< span class = "string" > "utf-8"< / span > ))< / span > < br > < span class = "line" > passwdIn = md5.hexdigest()< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > (nameIn == < span class = "string" > ''< / span > ) < span class = "keyword" > or< / span > (passwdIn == < span class = "string" > ''< / span > ):< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "账号和密码不能为空"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < span class = "line" > print(nameIn, passwdIn)< / span > < br > < span class = "line" > fr = open(< span class = "string" > './etc/passwd.txt'< / span > )< / span > < br > < span class = "line" > arrayofLines = fr.readlines()< / span > < br > < span class = "line" > numberofLines = len(arrayofLines)< / span > < br > < span class = "line" > < span class = "keyword" > for< / span > line < span class = "keyword" > in< / span > arrayofLines:< / span > < br > < span class = "line" > line = line.strip()< / span > < br > < span class = "line" > listFromLine = line.split(< span class = "string" > ':'< / span > )< / span > < br > < span class = "line" > name = listFromLine[< span class = "number" > 0< / span > ]< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > name == nameIn:< / span > < br > < span class = "line" > numberofLines = < span class = "number" > -1< / span > < / span > < br > < span class = "line" > passwd = listFromLine[< span class = "number" > 1< / span > ]< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > passwd == passwdIn:< / span > < br > < span class = "line" > group = listFromLine[< span class = "number" > 2< / span > ]< / span > < br > < span class = "line" > print(< span class = "string" > "\n登录成功!\n"< / span > )< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > name == < span class = "string" > 'root'< / span > :< / span > < br > < span class = "line" > print(< span class = "string" > 'root登录'< / span > )< / span > < br > < span class = "line" > rootUI.show()< / span > < br > < span class = "line" >
< / li >
< / ul >
< hr >
< h3 id = "2-管理员功能实现" > < a href = "#2-管理员功能实现" class = "headerlink" title = "2. 管理员功能实现" > < / a > 2. 管理员功能实现< / h3 > < p > < strong > 管理员可以对用户进行增、删、查的操作< / strong > < / p >
< p > < img src = "https://github.com/Cool-Y/BIBA-model/blob/master/img/rootUI.PNG" alt = "login" > < / p >
< h4 id = "增加用户的实现" > < a href = "#增加用户的实现" class = "headerlink" title = "增加用户的实现" > < / a > 增加用户的实现< / h4 > < blockquote >
< ul >
< li > 获取管理员输入的用户名、密码和用户等级< / li >
< li > 将明文密码转换为md5值< / li >
< li > 判断输入的账户是否已经存在以及是否为空< / li >
< li > 如果没有问题， < / li >
< / ul >
< / blockquote >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < span class = "line" > 20< / span > < br > < span class = "line" > 21< / span > < br > < span class = "line" > 22< / span > < br > < span class = "line" > 23< / span > < br > < span class = "line" > 24< / span > < br > < span class = "line" > 25< / span > < br > < span class = "line" > 26< / span > < br > < span class = "line" > 27< / span > < br > < span class = "line" > 28< / span > < br > < span class = "line" > 29< / span > < br > < span class = "line" > 30< / span > < br > < span class = "line" > 31< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > adduser< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > print(< span class = "string" > '开始添加'< / span > )< / span > < br > < span class = "line" > name = self.lineEdit_4.text()< / span > < br > < span class = "line" > passwd = self.lineEdit_6.text()< / span > < br > < span class = "line" > md5 = hashlib.md5()< / span > < br > < span class = "line" > md5.update(passwd.encode(< span class = "string" > "utf-8"< / span > ))< / span > < br > < span class = "line" > passwd = md5.hexdigest()< / span > < br > < span class = "line" > group = self.comboBox.currentText()< / span > < br > < span class = "line" > self.name = name< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > self.euxit():< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > name == < span class = "string" > ''< / span > < span class = "keyword" > or< / span > passwd == < span class = "string" > ''< / span > :< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "账号和密码不能为空"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < span class = "line" > < span class = "keyword" > else< / span > :< / span > < br > < span class = "line" > cur_path = os.getcwd()< / span > < br > < span class = "line" > filename = cur_path + < span class = "string" > '/etc/passwd.txt'< / span > < / span > < br > < span class = "line" > fi = open(filename, < span class = "string" > 'r+'< / span > )< / span > < br > < span class = "line" > str = name + < span class = "string" > ':'< / span > + passwd + < span class = "string" > ':'< / span > + group + < span class = "string" > '\n'< / span > < / span > < br > < span class = "line" > print(< span class = "string" > '成功增加用户'< / span > + str + < span class = "string" > '\n'< / span > )< / span > < br > < span class = "line" > fi.seek(< span class = "number" > 0< / span > , < span class = "number" > 2< / span > )< / span > < br > < span class = "line" > fi.write(str)< / span > < br > < span class = "line" > fi.close()< / span > < br > < span class = "line" > < span class = "keyword" > else< / span > :< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "用户已存在"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h4 id = "查询已有用户的实现" > < a href = "#查询已有用户的实现" class = "headerlink" title = "查询已有用户的实现" > < / a > 查询已有用户的实现< / h4 > < blockquote >
< p > 从passwd.txt中逐行读出< / p >
< / blockquote >
< p > < img src = "https://github.com/Cool-Y/BIBA-model/blob/master/img/existUser.PNG" alt = "login" > < / p >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > readuser< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > print(< span class = "string" > 'readuser'< / span > )< / span > < br > < span class = "line" > cur_path = os.getcwd()< / span > < br > < span class = "line" > filename = cur_path + < span class = "string" > '/etc/passwd.txt'< / span > < / span > < br > < span class = "line" > fo = open(filename)< / span > < br > < span class = "line" > arrayofLines = fo.readlines()< / span > < br > < span class = "line" > names = < span class = "string" > ''< / span > < / span > < br > < span class = "line" > < span class = "keyword" > for< / span > line < span class = "keyword" > in< / span > arrayofLines:< / span > < br > < span class = "line" > line = line.strip()< / span > < br > < span class = "line" > listFromLine = line.split(< span class = "string" > ':'< / span > )< / span > < br > < span class = "line" > names = names + listFromLine[< span class = "number" > 0< / span > ] + < span class = "string" > '\n'< / span > < / span > < br > < span class = "line" > self.textEdit.setPlaceholderText(names)< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h4 id = "删除用户的实现" > < a href = "#删除用户的实现" class = "headerlink" title = "删除用户的实现" > < / a > 删除用户的实现< / h4 > < blockquote >
< p > 从passwd.txt中逐行读出用户名， ， ， < / p >
< / blockquote >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > rmuser< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > print(< span class = "number" > 1< / span > )< / span > < br > < span class = "line" > cur_path = os.getcwd()< / span > < br > < span class = "line" > filename = cur_path + < span class = "string" > '/etc/passwd.txt'< / span > < / span > < br > < span class = "line" > rmName = self.lineEdit.text()< / span > < br > < span class = "line" > < span class = "keyword" > with< / span > open(filename, < span class = "string" > 'r'< / span > ,encoding=< span class = "string" > "utf-8"< / span > ) < span class = "keyword" > as< / span > r:< / span > < br > < span class = "line" > lines = r.readlines()< / span > < br > < span class = "line" > lenl = len(lines)< / span > < br > < span class = "line" > < span class = "keyword" > with< / span > open(filename, < span class = "string" > 'w'< / span > ,encoding=< span class = "string" > "utf-8"< / span > ) < span class = "keyword" > as< / span > w:< / span > < br > < span class = "line" > < span class = "keyword" > for< / span > line < span class = "keyword" > in< / span > lines:< / span > < br > < span class = "line" > l = line.strip()< / span > < br > < span class = "line" > listFromLine = l.split(< span class = "string" > ':'< / span > )< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > rmName == listFromLine[< span class = "number" > 0< / span > ]:< / span > < br > < span class = "line" > print(< span class = "string" > '删除用户'< / span > + rmName)< / span > < br > < span class = "line" > < span class = "keyword" > continue< / span > < / span > < br > < span class = "line" > < span class = "keyword" > if< / span > line == < span class = "string" > '\n'< / span > :< / span > < br > < span class = "line" > print(< span class = "string" > 'find换行'< / span > )< / span > < br > < span class = "line" > line = < span class = "string" > ''< / span > < / span > < br > < span class = "line" > w.write(line)< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< hr >
< h3 id = "3-普通用户功能实现" > < a href = "#3-普通用户功能实现" class = "headerlink" title = "3. 普通用户功能实现" > < / a > 3. 普通用户功能实现< / h3 > < p > < strong > 普通用户可以完成对合法权限文件的读取、增加内容（上写下读）以及创建文件的操作< / strong > < / p >
< p > < img src = "https://github.com/Cool-Y/BIBA-model/blob/master/img/normal.PNG" alt = "login" > < / p >
< h4 id = "读取文件内容" > < a href = "#读取文件内容" class = "headerlink" title = "读取文件内容" > < / a > 读取文件内容< / h4 > < blockquote >
< p > 双击文件名< br > 获取选中文件和当前用户的完整性级别< br > 如果用户的级别低于文件，则读取文件内容< / p >
< / blockquote >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < span class = "line" > 20< / span > < br > < span class = "line" > 21< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > readfile< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > dict = self.getGrade()< / span > < br > < span class = "line" > fgrade = str(dict[self.file_path])< / span > < br > < span class = "line" > ugrade = self.lineEdit_2.text()< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > ugrade > = fgrade:< / span > < br > < span class = "line" > print(ugrade+ < span class = "string" > ' 正在读取 '< / span > +fgrade)< / span > < br > < span class = "line" > filename = self.file_path< / span > < br > < span class = "line" > print(filename)< / span > < br > < span class = "line" > fr = open(filename)< / span > < br > < span class = "line" > lines = < span class = "string" > ''< / span > < / span > < br > < span class = "line" > arrayofLines = fr.readlines()< / span > < br > < span class = "line" > < span class = "keyword" > for< / span > line < span class = "keyword" > in< / span > arrayofLines:< / span > < br > < span class = "line" > lines += line< / span > < br > < span class = "line" > self.textEdit.setText(lines)< / span > < br > < span class = "line" > print(< span class = "string" > '读取成功\n'< / span > )< / span > < br > < span class = "line" > < span class = "keyword" > else< / span > :< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "您的用户等级太高"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h4 id = "增加文件内容" > < a href = "#增加文件内容" class = "headerlink" title = "增加文件内容" > < / a > 增加文件内容< / h4 > < blockquote >
< p > 双击文件名< br > 获取选中文件和当前用户的完整性级别< br > 如果用户的级别高于文件，则写入文件内容< / p >
< / blockquote >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > writefile< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > dict = self.getGrade()< / span > < br > < span class = "line" > fgrade = dict[self.file_path]< / span > < br > < span class = "line" > ugrade = self.lineEdit_2.text()< / span > < br > < span class = "line" > print(ugrade + < span class = "string" > ' 正在写入 '< / span > + fgrade)< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > ugrade < = fgrade:< / span > < br > < span class = "line" > filename = self.file_path< / span > < br > < span class = "line" > str = self.textEdit.toPlainText()< / span > < br > < span class = "line" > print(str)< / span > < br > < span class = "line" > fo = open(filename, < span class = "string" > 'r+'< / span > )< / span > < br > < span class = "line" > fo.seek(< span class = "number" > 0< / span > , < span class = "number" > 2< / span > )< / span > < br > < span class = "line" > fo.write(str)< / span > < br > < span class = "line" > < span class = "keyword" > else< / span > :< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "您的用户等级太低"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h4 id = "创建文件" > < a href = "#创建文件" class = "headerlink" title = "创建文件" > < / a > 创建文件< / h4 > < blockquote >
< p > 获取当前用户名和输入的文件名< br > 在当前路径下创建名为用户名的文件< br > 并对新创建的文件与用户等级建立字典， ， < br > 这个字典方便读写时判断等级高低< / p >
< / blockquote >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < span class = "line" > 20< / span > < br > < span class = "line" > 21< / span > < br > < span class = "line" > 22< / span > < br > < span class = "line" > 23< / span > < br > < span class = "line" > 24< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > touchfile< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > urName = self.lineEdit.text()< / span > < br > < span class = "line" > filename = self.lineEdit_4.text()< / span > < br > < span class = "line" > cur_path = os.getcwd()< / span > < br > < span class = "line" > new_path = os.path.join(cur_path + < span class = "string" > '/file'< / span > , urName)< / span > < br > < span class = "line" > print(urName)< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > os.path.exists(new_path) == < span class = "literal" > False< / span > :< / span > < br > < span class = "line" > os.mkdir(new_path)< / span > < br > < span class = "line" > os.chdir(new_path)< / span > < br > < span class = "line" > fr = open(filename, < span class = "string" > 'w'< / span > )< / span > < br > < span class = "line" > key = (new_path + < span class = "string" > '/'< / span > + filename).replace(< span class = "string" > '\\'< / span > , < span class = "string" > '/'< / span > )< / span > < br > < span class = "line" > fr.close()< / span > < br > < span class = "line" > os.chdir(cur_path)< / span > < br > < span class = "line" > fa = open(< span class = "string" > './etc/ac.txt'< / span > , < span class = "string" > 'r'< / span > )< / span > < br > < span class = "line" > a = fa.read()< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > a == < span class = "string" > ''< / span > :< / span > < br > < span class = "line" > dict = { } < / span > < br > < span class = "line" > < span class = "keyword" > else< / span > :< / span > < br > < span class = "line" > dict = eval(a)< / span > < br > < span class = "line" > dict[key] = self.lineEdit_2.text()< / span > < br > < span class = "line" > fr = open(< span class = "string" > './etc/ac.txt'< / span > , < span class = "string" > 'w'< / span > )< / span > < br > < span class = "line" > fr.write(str(dict))< / span > < br > < span class = "line" > fr.close()< / span > < br > < span class = "line" > fa.close()< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< hr >
< h2 id = "五、心得体会：" > < a href = "#五、心得体会：" class = "headerlink" title = "五、心得体会：" > < / a > 五、心得体会：< / h2 > < h2 id = "六、改进部分：" > < a href = "#六、改进部分：" class = "headerlink" title = "六、改进部分：" > < / a > 六、改进部分：< / h2 >
< / div >
2019-03-22 12:33:24 +00:00
< div >
< div style = "padding: 10px 0; margin: 20px auto; width: 90%; text-align: center;" >
< div > 您的支持将鼓励我继续创作！< / div >
< button id = "rewardButton" disable = "enable" onclick = "var qr = document.getElementById('QR'); if (qr.style.display === 'none') {qr.style.display='block';} else {qr.style.display='none'}" >
< span > 打赏< / span >
< / button >
< div id = "QR" style = "display: none;" >
< div id = "wechat" style = "display: inline-block" >
< img id = "wechat_qr" src = "/images/wechatpay.png" alt = "Cool-Y 微信支付" >
< p > 微信支付< / p >
< / div >
< div id = "alipay" style = "display: inline-block" >
< img id = "alipay_qr" src = "/images/alipay.png" alt = "Cool-Y 支付宝" >
< p > 支付宝< / p >
< / div >
< / div >
< / div >
< / div >
2019-03-22 11:03:55 +00:00
< footer class = "post-footer" >
< div class = "post-tags" >
< a href = "/tags/模型实现/" rel = "tag" > # 模型实现< / a >
< a href = "/tags/python/" rel = "tag" > # python< / a >
< a href = "/tags/访问控制/" rel = "tag" > # 访问控制< / a >
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