P2P(点对点)的流行产生了大批网络传输软件，我写一个简单的P2P文件传输，一方发送文件，一方接受，直到传输完整个文件。-P2P (peer) produced a large number of popular network transmission software, I wrote a simple P2P file transfer, one to send the file, one party to accept, until the transfer complete files