基于同步socket的多线程上传与下载。该程序是我自己编写的，包含服务器和客户端。同时支持多任务、多线程上传与下载、断点续传。该程序对学习网络编程、多线程同步等有很大的帮助。-Multithreading upload and download synchronization based on socket. The program is what I have written, including server and client. At the same time support mult