안드로이드 - JavaServer 와 Android Socket 통신으로 파일전송중 문제가있습니다.

JavaServer 에서 Android 로 여러개의 파일을 전송을 하고 싶어서

코딩을하고 있습니다. 하지만 파일은 전송되지만 한가지 문제가 발생하는데

에러는 나지 않고 정상적으로 소켓통신은 작동하지만

JavaServer에서 보내고자하는 파일 sample1.txt(674kb) , sample2.txt(1300kb)를 전송하면

Android Client에서는 sample1.txt(1974kb), sample2.txt(0kb) 이런식으로 하나의 파일에

모든 값이 저장됩니다. 소스에서 어디가 문제인지 잘 이해가 되지 않습니다...

JavaServer 소스입니다.

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;
 
public class MultifileTransferServer {
    public ServerSocket serv;
    public Socket sock;
 
    BufferedInputStream bis = null;
    DataInputStream dis = null;
    DataOutputStream dos = null;
 
    ArrayList<String> fileNames = new ArrayList<String>();
    ArrayList<File> files = new ArrayList<File>();
 
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
 
        try
        {
            System.out.println(InetAddress.getLocalHost().getHostAddress());
        }catch(UnknownHostException e)
        {
            e.printStackTrace();
        }
        MultifileTransferServer server = new MultifileTransferServer(5000);
    }
 
    public MultifileTransferServer(int port)
    {
        try
        {
            fileNames.add("sample1.txt");
            fileNames.add("sample2.txt");
 
            for(String fileName : fileNames)
            {
                files.add(new File("D:/TestTest/"+fileName));
            }
 
            this.serv = new ServerSocket(port);
            System.out.println("Server Started...~~");
            while(true)
            {
                this.sock = this.serv.accept();
                try
                {   
                    System.out.println("Client Accept....!!");
 
                    dis = new DataInputStream(new BufferedInputStream(sock.getInputStream()));
                    dos = new DataOutputStream(new BufferedOutputStream(sock.getOutputStream()));
 
 
                    dos.writeInt(fileNames.size());
                    int readSize = 0;
 
                    int n = 0;
                    byte[]buf = new byte[4092];
                    byte[] done = new byte[3];
                    String str = "    ";
                    done = str.getBytes();
 
                    for(int i=0;i<fileNames.size();i++)
                    {
                        System.out.println("Start File Trans "+ i);
 
 
                         FileInputStream fis = new FileInputStream(files.get(i));
                            while((n =fis.read(buf)) != -1){
                                dos.write(buf,0,n);
                                System.out.println(n);
                                dos.flush();
                            }
 
                            dos.write(done,0,3);
                            dos.flush();
 
                                                }
 
                }catch(Exception e)
                {
                    e.printStackTrace();
                }finally
                {
                    try
                    {
                        if(bis != null) bis.close();
                        if(dos != null) dos.close();
                        if(dis != null) dis.close();
                    } 
                    catch (Exception e2) 
                    {
                        // TODO: handle exception
                        e2.printStackTrace();
                    }
                }
            }
 
        }catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}

Android Client 소스입니다.

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
 
import java.io.IOException;
import java.net.Socket;
 
public class MainActivity extends AppCompatActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        final String testDir = getApplicationContext().getCacheDir().toString();
 
        new Thread()
        {
            public void run()
            {
                String ServerIP = "192.168.0.10";
                int port = 5000;
                SocketConnect(ServerIP,port);
            }
        }.start();
    }
 
    public void SocketConnect(String ServerIP, int port)
    {
        try
        {
            Socket connection = new Socket(ServerIP, port);
            MultiFileTransferClient.Client(connection);
 
        }catch(IOException e)
        {
            e.printStackTrace();
        }
    }
}
 
import android.os.Environment;
import android.util.Log;
 
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Writer;
import java.net.Socket;
 
public class MultiFileTransferClient {
 
    public static void Client(Socket sock)
    {
 
        BufferedOutputStream bos = null;
        ObjectOutputStream oos = null;
        DataInputStream dis = null;
        DataOutputStream dos = null;
        int fileTransferCount = 0;
        long fileTransferSize = 0;
        int readBufLength = 0;
        File copyFile = null;
 
        String[] TestFileName = new String[2];
 
        TestFileName[0] = "sample1.txt";
        TestFileName[1] = "sample2.txt";
 
        try {
 
            dis = new DataInputStream(new BufferedInputStream(sock.getInputStream()));
            dos = new DataOutputStream(new BufferedOutputStream(sock.getOutputStream()));
 
            String sdcard = Environment.getExternalStorageDirectory().getAbsolutePath();
 
            try
            {
 
                fileTransferCount = dis.readInt();
                int n = 0;
                byte[]buf = new byte[4092];
 
                for(int i=0; i< fileTransferCount ;i++)
                {
                    Log.d("Test","Receiveing file : " + TestFileName[i]);
                    copyFile = new File(TestFileName[i]);
                    FileOutputStream fos = new FileOutputStream(sdcard+"/"+copyFile,false);
 
                    while((n = dis.read(buf)) != -1 && n!=3 ){
                        fos.write(buf,0,n);
                        fos.flush();
                    }
                    fos.close(); 
                }
 
            }
            catch (Exception e)
            {
                // TODO: handle exception
                e.printStackTrace();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }finally
        {
            try
            {
                if(dis != null) dis.close();
                if(dos != null) dos.close();
                if(sock != null) sock.close();
            }
            catch (Exception e)
            {
                // TODO: handle exception
                e.printStackTrace();
            }
        }
    }
}

그리고 혹시 반대로 Android Client 에서 JavaServer로 파일을 전송할떄도 위의 소스를 이용해도

되는건가요?

JavaServer 와 Android Socket 통신으로 파일전송중 문제가있습니다. [closed]

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