send

Server端代码： #!/usr/bin/env python # -*- coding: utf-8 -*- # Author: areful # a server example which send hello to client. import socket import threading import time def tcp_link(_sock, _addr): print('Accept new connection from %s:%s...' % _addr) _sock.send(bytes('Welcome!', encoding='utf-8')) while True: data = _sock.recv(1024) time.sleep(1) if data == 'exit' or not data: break _sock.send(bytes('Hello, %s!' % data, encoding='utf-8')) _sock.close() print('Connection from %s:%s closed.' % _addr) s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.bind(('127.0.0.1', 9999)) s.listen(5) print(

当A类需要依赖于B类，也就是说需要在A类中实例化B类的对象来使用时候，如果B类中的功能发生改变，也会导致A类中使用B类的地方也要跟着修改，导致A类与B类高耦合。这个时候解决方式是，A类应该去依赖B类的接口，把具体的类的实例化交给外部。 <?php /** * 依赖注入模式 */ interface Message { public function send(); } class SendEmail implements Message { public function send() { // TODO: Implement send() method. echo 'send email','<br/>'; } } class SendSMS implements Message { public function send() { // TODO: Implement send() method. echo 'send sms','<br/>'; } } class User { private $server = null; public function __construct(Message $message) { $this->server = $message; } public function sendMsg() { return $this->server-