package client;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.FileInputStream;

import java.io.IOException;

import java.net.Socket;

import java.net.UnknownHostException;

public class MyClient {

    private static final String ADDRESS = "127.0.0.1";

    private static final int PORT = 7869;

    private Socket CreateSocket() {

        try {

            Socket server = new Socket(ADDRESS, PORT);

            return server;

        } catch (UnknownHostException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return null;

    }

    public boolean FileTransfer(String fileName) {

        Socket server = this.CreateSocket();

        try {

            BufferedOutputStream bos = new BufferedOutputStream(

                    server.getOutputStream());

            BufferedInputStream bis = new BufferedInputStream(

                    new FileInputStream(fileName));

            byte[] bytes = new byte[1024];

            int len = 0;

            while ((len = bis.read(bytes)) != -1) {

                bos.write(bytes, 0, len);

            }

            bis.close();

            bos.close();

            return true;

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return false;

    }

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        MyClient client = new MyClient();

        if (client.FileTransfer("wario.png")) {

            System.out.println("Trans file sucessfully!");

        }

    }

}

package server;

import java.io.IOException;

import java.net.ServerSocket;

import java.net.Socket;

public class FileServer implements Runnable {

    private ServerSocket server = null;

    private int port = -1;

    private String fileName;

    public FileServer(int port, String fileName) {

        this.port = port;

        this.fileName = fileName;

        try {

            this.server = new ServerSocket(this.port);

        } catch (IOException e) {

            // TODO Auto-generated catch block

            System.out.println("Please check this port!");

            e.printStackTrace();

        }

    }

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        Thread thread=new Thread(new FileServer(7869,"nannan.png"));

        thread.start();

    };

    @Override

    public void run() {

        // TODO Auto-generated method stub

        while (true) {

            try {

                Socket client;

                client = this.server.accept();

                AcceptFile accept=new AcceptFile(client,fileName);

                Thread thread=new Thread(accept);

                thread.start();

            } catch (IOException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

    }

}

package server;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.net.Socket;

public class AcceptFile extends Thread {

    private Socket client;

    private String fileName;

    public AcceptFile(Socket client,String fileName) {

        this.client = client;

        this.fileName=fileName;

    }

    @Override

    public void run() {

        // TODO Auto-generated method stub

        try {

            BufferedInputStream bis=new BufferedInputStream(client.getInputStream());

            BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(fileName));

            System.out.println("Server begin receive file!");

            int len=0;

            byte[] bytes=new byte[1024];

            while((len=bis.read(bytes))!=-1){

                bos.write(bytes, 0, len);

            }

            bos.close();

            bis.close();

            System.out.println("Accept file sucessfully!");

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

    }

}