FTP - Client 만들기

Posted by 백창
2014. 11. 28. 15:52 개발/Java
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 개요


 JAVA로 간단한 FTP 클라이언트를 만들어보자



 소스


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import java.io.BufferedInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.Socket;
 
public class Client {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String IP = "127.0.0.1";
        Socket socket = null;
        
        try{
            socket = new Socket(IP, 8521);
            System.out.println("서버와 연결");
            
            FileSender fs = new FileSender(socket);
            fs.start();
            
        }catch(IOException e){
            e.printStackTrace();
        }
    }
 
}
 
class FileSender extends Thread{
    Socket socket;
    DataOutputStream dos;
    FileInputStream fis;
    BufferedInputStream bis;
        
    public FileSender(Socket socket){
        this.socket = socket;
        try{
            //데이터 전송용 스트림 생성
            dos = new DataOutputStream(socket.getOutputStream());
        }catch(IOException e){
            e.printStackTrace();
        }
        
        
    }
    @Override
    public void run(){
        try{
            //String fileName = "test.txt";
            String fileName = "test.png";
 
            
            dos.writeUTF(fileName);
            
            File f =new File(fileName);
            fis = new FileInputStream(f);
            bis = new BufferedInputStream(fis);
            
            int len;
            int size = 4096;
            byte[] data = new byte[size];
            while((len = bis.read(data))!=-1){
                
                dos.write(data,0,len);
            }
            
            dos.flush();
            dos.close();
            bis.close();
            fis.close();
            
        }catch(IOException e){
            e.printStackTrace();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}


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FTP - server 만들기

Posted by 백창
2014. 11. 28. 15:49 개발/Java
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 개요


 JAVA로 간단한 FTP 서버를 만들어보자.


 소스


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import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
 
 
public class Server {
 
    public static void main(String[] args) {
        ServerSocket serverSocket = null;
        Socket socket = null;
        
        try{
            //리스너 소켓 생성 후 대기
            serverSocket = new ServerSocket(8521);
            System.out.println("#####    서버실행    #####");
            
            //클라이언트와 연결 완료
            socket = serverSocket.accept();
            System.out.println("#####    연결완료    #####");
            
            //수신시작
            FileReceiver fr = new FileReceiver(socket);
            fr.start();
            
        }catch(IOException e){
            e.printStackTrace();
        }
 
    }
 
}
 
class FileReceiver extends Thread{
    Socket socket;
    DataInputStream dis;
    FileOutputStream fos;
    BufferedOutputStream bos;
        
    String filePath = "D:\\ForSecurity\\data\\";
    
    public FileReceiver(Socket socket){
        this.socket = socket;
    }
    
    @Override
    public void run(){
        try{
            System.out.println("#####    수신시작    #####");
            dis = new DataInputStream(socket.getInputStream());
            
            //파일명 수신
            String fName = dis.readUTF();
            System.out.println("#    파일명 : "+fName);
            
            //파일 생성
            File f = new File(filePath+fName);
            fos = new FileOutputStream(f);
            bos = new BufferedOutputStream(fos);
            System.out.println("#    "+fName+" 파일을 생성");
            
            //파일 쓰기
            int len;
            int size=4096;
            byte[] data = new byte[size];
            while((len = dis.read(data))!=-1){
                bos.write(data,0,len);
            }
            
            
            bos.flush();
            bos.close();
            fos.close();
            dis.close();
            
            System.out.println("#    전송완료 사이즈 : "+f.length());
            
        }catch(IOException e){
            e.printStackTrace();
        }
    }
}
 










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