Python编程及项目开发 第7章-项目开发

7.6项目开发1.功能需求利用Socket编写一个聊天程序，客户端聊天界面如图7-8所示。单击“发送”按钮可以发送消息，并显示到界面中；单击“设置”可以改变用户名。2.项目设计项目的界面设计如图7-8所示。项目的类图如图7-9所示。3.项目实现同理是否补充项目设计同理是否补充项目设计服务器端主要代码如下（server.py）：1#server.py2importsocket3importthreading45classChatServer:6definit(self):7self.clients={}8self.server=socket.socket(socket.AF_INET,socket.SOCK_STREAM)9self.server.bind(('',12345))1010self.server.listen(5)11print("PyQt聊天服务器已启动")13defhandle_client(self,client_socket,addr):14username=client_socket.recv(1024).decode('utf-8')15self.clients[username]=client_socket16self.broadcast(f"{username}加入了聊天室",None)18whileTrue:20msg=client_socket.recv(1024).decode('utf-8')21ifmsg.startswith("!rename"):22new_name=msg.split()[1]23self.clients[new_name]=self.clients.pop(username)24username=new_name25elifmsg=="!quit":26self.remove_client(username)27break28else:29self.broadcast(f"{username}:{msg}",client_socket)30except:31self.remove_client(username)32break3334defbroadcast(self,message,sender):35forname,sockinself.clients.items():36ifsock!=sender:37try:38sock.send(message.encode('utf-8'))39except:40self.remove_client(name)4142defremove_client(self,username):43ifusernameinself.clients:44sock=self.clients.pop(username)45sock.close()46self.broadcast(f"{username}离开了聊天室",None)4748defrun(self):49whileTrue:50client_sock,addr=self.server.accept()51threading.Thread(target=self.handle_client,args=(client_sock,addr)).start()5253if__name__=="__main__":54server=ChatServer()55server.run()56客户端主要代码如下（client.py）：1#client.py2fromPyQt5.QtWidgetsimport(QApplication,QMainWindow,QWidget,QVBoxLayout,3QTextEdit,QLineEdit,QPushButton,QLabel,QHBoxLayout)4fromPyQt5.QtCoreimportQt,pyqtSignal,QObject5importsocket6importthreading78classCommunicate(QObject):9new_message=pyqtSignal(str)11classChatClient(QMainWindow):12definit(self):13super().init()14self.username="Default"15self.init_ui()16self.setup_network()18definit_ui(self):19#主窗口设置20self.setWindowTitle("聊天程序客户端")21self.setFixedSize(400,500)22self.setStyleSheet("background-color:#f0f0f0;")2324#中央部件25central_widget=QWidget()26self.setCentralWidget(central_widget)27layout=QVBoxLayout(central_widget)2829#聊天显示区域30self.chat_display=QTextEdit()31self.chat_display.setReadOnly(True)32self.chat_display.setStyleSheet("""33QTextEdit{34background-color:white;35border:1pxsolid#ccc;36padding:5px;37}38""")39self.chat_display.append("Default:大家好")40layout.addWidget(self.chat_display)414142#输入区域43input_layout=QHBoxLayout()44self.message_input=QLineEdit()45self.message_input.setPlaceholderText("输入消息...")46self.message_input.returnPressed.connect(self.send_message)47input_layout.addWidget(self.message_input)4849self.send_btn=QPushButton("发送")50self.send_btn.clicked.connect(self.send_message)51input_layout.addWidget(self.send_btn)52layout.addLayout(input_layout)5354#底部信息栏55bottom_layout=QHBoxLayout()56self.username_label=QLabel(f"用户名:{self.username}")57bottom_layout.addWidget(self.username_label)5859bottom_layout.addStretch()6061self.settings_btn=QPushButton("设置")62self.settings_btn.clicked.connect(self.change_username)63bottom_layout.addWidget(self.settings_btn)64layout.addLayout(bottom_layout)6566#信号连接67m=Communicate()68m.new_message.connect(self.display_message)6970defsetup_network(self):71self.client_socket=socket.socket(socket.AF_INET,socket.SOCK_STREAM)72self.client_socket.connect(('localhost',12345))73self.client_socket.send(self.username.encode('utf-8'))7475#启动接收线程76self.receive_thread=threading.Thread(target=self.receive_messages,daemon=True)77self.receive_thread.start()7879defsend_message(self):80message=self.message_input.text().strip()81ifmessage:82self.client_socket.send(message.encode('utf-8'))83self.message_input.clear()8585defreceive_messages(self):86whileTrue:87try:88message=self.client_socket.recv(1024).decode('utf-8')89m.new_message.emit(message)90except:91break9293defdisplay_message(self,message):94self.chat_display.append(message)9596defchange_username(self):97fromPyQt5.QtWidgetsimportQInputDialog98new_name,ok=QInputDialog.getText(99self,'设置用户名','输入新用户名:',text=self.username)100ifokandnew_nameandnew_name!=self.username:101old_name=self.username102self.username=new_name103self.username_label.setText(f"用户名:{new_name}")104self.client_socket.send(f"!rename{new_name}".encode('utf-8'))105self.display_message(f"系统:用户名已从{old_name}改为{new_name}")107defcloseEvent(self,event):108self.client_socket.send("!quit".encode('utf-8'))109self.client_socket.close()110event.accept()112if__name__=="__main__":113app=QApplication([])114client=ChatClient()115client.show()116app.exec_()1.功能需求利用ftplib模块编写一个FTP客户端程序，实现FTP服务器的登录、文件的上传、下载，界面如图7-10所示。2.项目设计项目类的设计如图7-11所示。3.项目实现本程序使用PyQT进行界面设计，程序主要代码如下：1#1#-*-coding:utf-8-*-2fromPyQt5importQtCore,QtGui,QtWidgets33importsys4importos5fromftplibimportFTP67classUi_Form(object):8defsetupUi(self,MainWindow):12self.pushButton.clicked.connect(self.ftp_connect)#连接按钮13self.pushButton_2.clicked.connect(self.ftp_disconnect)#断开按钮14self.pushButton_3.clicked.connect(self.download)#下载按钮15self.pushButton_4.clicked.connect(self.upload)#上传按钮20deflocalfilelist(self):#本地文件列表21localfile=os.listdir('g:/04')#获取本地文件列表22forLocalinlocalfile:23self.listView_2.addItem(Local)#将文件加入列表框中2425defftp_connect(self):#FTP连接26host=self.lineEdit_ip.text()#获取输入主机名27port=int(self.lineEdit_port.text())#获取输入的端口28username=self.lineEdit_username.text()#获取输入用户名29password=self.lineEdit_password.text()#获取输入密码30self.ftp=FTP()31self.ftp.connect(host,21)#连接FTP服务器32self.ftp.login(username,password)#登录33self.label_state.setText('服务器已连接')34filelist=self.ftp.nlst()#取得服务器文件列表35self.dir=self.ftp.pwd()36forLocalinfilelist:37self.listView.addItem(Local)38