Server

publicclassServer{
     /** * @param args the command line arguments */ public static void main(String[] args)throwsIOException{
     ServerSocket serverSocket =null;try{
             serverSocket =newServerSocket(4444); }catch(IOException ex){
     System.out.println("Can't setup server on this port number. "); } Socket socket =null; InputStream is =null; FileOutputStream fos =null; BufferedOutputStream bos =null; int bufferSize =0;try{
             socket = serverSocket.accept();} catch(IOException ex){
     System.out.println("Can't accept client connection. "); }try{
             is = socket.getInputStream();        bufferSize = socket.getReceiveBufferSize(); 　　　　System.out.println("Buffer size: "+ bufferSize); }catch(IOException ex){
     System.out.println("Can't get socket input stream. "); }try{
             fos =newFileOutputStream("M:\\test2.xml");        bos =newBufferedOutputStream(fos); 　　}catch(FileNotFoundException ex){
     　　　　System.out.println("File not found. "); 　　} 　　byte[] bytes =newbyte[bufferSize]; 　　int count; 　　while((count = is.read(bytes))>0){
             bos.write(bytes,0, count); }    bos.flush();    bos.close();    is.close();    socket.close();    serverSocket.close();}

}

and the Client

publicclassClient{
     /** * @param args the command line arguments */ public static void main(String[] args)throwsIOException{
     　　Socket socket =null; 　　String host ="127.0.0.1";    socket =newSocket(host,4444); 　　File file =newFile("M:\\test.xml");// Get the size of the file 　　long length = file.length(); 　　if(length >Integer.MAX_VALUE){
     　　　　System.out.println("File is too large."); 　　} 　　byte[] bytes =newbyte[(int) length]; 　　FileInputStream fis =newFileInputStream(file); 　　BufferedInputStream bis =newBufferedInputStream(fis); 　　BufferedOutputStream out =newBufferedOutputStream(socket.getOutputStream()); 　　int count; 　　while((count = bis.read(bytes))>0){
             out.write(bytes,0, count); 　　}    out.flush();    out.close();    fis.close();    bis.close();    socket.close();}

}