网络传输大文件，于是对基于socket的文件传输采用了缓冲输入/输出流来包装输出流，再采用数据输入/输出输出流进行包装，加快传输的速度。基本传输需要大家一般都知道，建立socket链接设置端口，监听端口-Network to transfer large files, so socket-based file transfer using buffered input/output stream to wrap the output stream, then use the data input/output output stream for packaging, speed up the transfer speed. Basic transport needs of people generally know, the establishment of the link set socket port, monitor port, etc.