Step1ServerSocketTCP.java

package ar.com.javacuriosities.networking.tcp.transfer;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Step1ServerSocketTCP {

	public static void main(String[] args) {
		try (ServerSocket serverSocket = new ServerSocket(9500)) {
			while (true) {
				System.out.println("Waiting client...");
				
				Socket clientSocket = serverSocket.accept();
				System.out.println("Accepted connection : " + clientSocket.getInetAddress());
				
				// Creamos un array de bytes para ir leyendo el file, acá creamos un array pequeño para el ejemplo
				byte[] bytes = new byte[10];
				
				// Pedimos el output stream
				OutputStream os = clientSocket.getOutputStream();
				
				InputStream resourceAsStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("data.txt");
				BufferedInputStream bis = new BufferedInputStream(resourceAsStream);
				
				int bytesRead = 0;
				while ((bytesRead = bis.read(bytes)) != -1) {
					System.out.println("Sending file (" + bytesRead + " bytes)");
					os.write(bytes, 0, bytesRead);
				}

				os.close();
				bis.close();
				System.out.println("Done.");
			}
		} catch (IOException e) {
			// Log and Handle exception
			e.printStackTrace();
		}
	}
}