File Transfer using Socket in JAVA

File Transfer using Socket in JAVA :

Client Program:

MyClient.java
______________________________________________________________________________

import java.net.*;

import java.io.*;

class MyClient {

    public static void main(String srgs[])throws IOException

    {

        Socket s=null;

        BufferedReader get=null;

        PrintWriter put=null;

        try

        { 

            s=new Socket("127.0.0.1",8081);

            get=new BufferedReader(new InputStreamReader(s.getInputStream()));

            put=new PrintWriter(s.getOutputStream(),true);

        }  

        catch(Exception e)

        {

            System.exit(0);

        }

        String u,f;

        System.out.println("Enter the file name to transfer from server:");

        DataInputStream dis=new DataInputStream(System.in);

        f=dis.readLine();

        put.println(f);

        File f1=new File("c:\\output");

        FileOutputStream  fs=new FileOutputStream(f1);

        while((u=get.readLine())!=null)

        { 

            byte jj[]=u.getBytes();

            fs.write(jj);

        }

        fs.close();

        System.out.println("File received");

        s.close();

    }

}

______________________________________________________________________________

Server Program:

FileServer.java

______________________________________________________________________________

import java.io.*;

import java.net.*;

public class FileServer {   

    public static void main(String args[])throws IOException

    { 

        ServerSocket ss=null;

        try

        {  

            ss=new ServerSocket(8081);

        }

        catch(IOException e)

        { 

            System.out.println("couldn't listen");

            System.exit(0);

        }

        Socket cs=null;

        try

        { 

            cs=ss.accept();

            System.out.println("Connection established"+cs);

        }

        catch(Exception e)

        { 

            System.out.println("Accept failed");

            System.exit(1);

        } 

        PrintWriter put=new PrintWriter(cs.getOutputStream(),true);

        BufferedReader st=new BufferedReader(new InputStreamReader(cs.getInputStream()));

        String s=st.readLine();

        System.out.println("The requested file is : "+s);

        File f=new File(s);

        if(f.exists())

        { 

            BufferedReader d=new BufferedReader(new FileReader(s));

            String line;

            while((line=d.readLine())!=null)

            {

                put.write(line);

                put.flush();

            }

            d.close();

            System.out.println("File transfered");

            cs.close();

            ss.close();

        }  

    }  

}

______________________________________________________________________________