Java网络编程Socket文件传输小案例

packagecom.kum.im.file; importjava.nio.channels.SocketChannel; importjava.nio.channels.SelectionKey; importjava.nio.channels.Selector; importjava.nio.ByteBuffer; importjava.io.RandomAccessFile; importjava.io.FileOutputStream; importjava.io.File; importjava.io.IOException; importja