Java File Transfer System (Client Server) (TCP / IP) network file transfer system with Java CLIENT ***************
fts package;
import java.net .*;
import IngressoUscita.Console;
public class Client {public static void
main (String [] args) throws UnknownHostException, ClassNotFoundException {
for (;;) {
Console.scriviStringa ("File Transfer System \\ n");
; String ip;
Console.scriviStringa ("start 'beginning' to exit 'go out' \\ n ");
Console.leggiStringa String asd = ();
if (asd.equalsIgnoreCase ("start")) {
; Console.scriviStringa ("Enter ip adresa Server");
; Console.leggiStringa ip = ();
InetAddress server_ip InetAddress.getByName = (ip);
Console.scriviStringa ("Enter IP:" + server_ip)
Chiesta chst = new Chiesta(ip_server, 2020);
chst.chiesta();
}
if (asd.equalsIgnoreCase("esco")) {
break;
}
else {
continue;
}
}
}
}
***********
package fts;
import java.io.*;
import java.net.*;
import IngressoUscita.Console;
public class Chiesta {
Socket so;
private InetAddress server;
private int port;
private DataInputStream dis;
private DataOutputStream dos;
private DataOutputStream dosFile;
private String dirDest;
private String fileDest;
public Chiesta(InetAddress ia, int pp) {
this.server = ia;
this.port = pp;
}
public void chiesta() throws ClassNotFoundException {
try {
so = new Socket (server, port);
DataInputStream dis = new (so.getInputStream ());
dos = new DataOutputStream (so.getOutputStream ());
num_file dis.readInt = int ();
Console.scriviStringa ("> File List: \\ n");
; int counter = 0;
counter = num_file;
String fileElenco;
Console.scriviStringa ("Server sends file number:" + num_file)
; while (counter> 0) {
fileElenco dis.readUTF = ();
System.out.println (fileElenco)
counter -;}
; Console.scriviStringa ("Which want to download file: enter name of file (sample.txt) \\ n");
String fileScelto ;
fileScelto Console.leggiStringa = ();
; dos.writeUTF (fileScelto)
Console.scriviStringa ("where to save the file, for example (C: \\ \\) \\ n");
dirDest = Console . leggiStringa ();
dirCheck File = new File (dirDest)
; if (! (dirCheck.exists ())) {
dirCheck.mkdir ();
;}
Console.scriviStringa (Insee the file name to save: esempio.doc] ");
fileDest = Console.leggiStringa();
try {
byte buffer;
dosFile = new DataOutputStream(
new FileOutputStream(dirDest + "\\" + fileDest));
while ((buffer = dis.readByte()) != -1) {
dosFile.writeByte (buffer);}
;} catch (Exception e) {
; Console.scriviStringa ("Caught exception" + e.getMessage());
} finally {
try {
if (dis == null) {
dis.close();
}
} catch (IOException ioe) {
}
}
} catch (IOException e) {
System.out.println ("Caught exception:" + e.getMessage ());} finally {
try {
dos.close ( )
dis.close ();
so.close ();
;} catch (IOException e) {
; Console.scriviStringa ("Captured l'ecccezione: " + e.getMessage());
}
}
}
}
*******
SERVER package fts;
import java.io.*;
import java.net.*;
import IngressoUscita.Console;
public class Server {
public static void main(String args[]) {
System.out.println ("Server waiting for client connection ..."); ServerSocket ss
;
try {ss = new ServerSocket (2020);
while (true) {Socket
aus ss.accept = ();
Console.scriviStringa ("\\ n Connected a client:" + aux);
; new Request (aus);
}} catch (IOException and )
{System.out.println ("Caught exception:" + e.getMessage ());
;}
}} ****************
package fts;
import java.io. *;
import java.net .*;
import IngressoUscita.Console;
public class Request extends Thread {private File dir
;
private File f;
private File [] listaFile;
private Socket know;
private DataInputStream disFile;
private DataInputStream dis;
private DataOutputStream dos;
public Request (Socket s) throws IOException {
this.so = s;
; dis = new DataInputStream (so.getInputStream ());
dos = new DataOutputStream (so.getOutputStream ());
, start ();
}
public void run() {
try {
dir = new File("C:\\src");
listaFile = dir.listFiles();
dos.writeInt (listaFile.length);
Console.scriviStringa ("Send fillet to client ...");
; Console.scriviStringa ("command file list");
; if (listaFile.length> 0) {
for (int i = 0; i < listaFile.length; i++) {
if (listaFile[i].isFile()) {
dos.writeUTF("(" + i + ")" + listaFile[i].getName());
} else if (listaFile[i].isDirectory()) {
System.out.println("Directory " + listaFile[i].getName());
}
}
} Else {
dos.writeUTF ("File not found");
}} catch (Exception e) {
Console.scriviStringa ("Caught exception:" + e.getMessage ());}
try {String
fileScelto;
; fileScelto dis.readUTF = ();
for (int i = 0; i < listaFile.length; i++) {
if (fileScelto.equals(listaFile[i].getName())) {
f = listaFile[i];
byte buffer;
disFile = new DataInputStream(
new FileInputStream(f));
try {
while ((buffer = disFile.readByte()) != -1) {
dos.writeByte(buffer);
}
{
}
} Catch (FileNotFoundException fnfe) {
Console.scriviStringa ("File not found");
} catch (IOException IOE) {
Console.scriviStringa ("Problems reading file.");
} finally {
try {
if (dis != null) {
dis.close();
}
} catch (IOException ioe) {
Console.scriviStringa ("Caught exception:" + ioe.getMessage ());
}
} } else {
Console.scriviStringa("File non cè");
}
}} catch (Exception e) {
Console.scriviStringa ( "Caught exception:" + e.getMessage ());} finally {
try {
Console.scriviStringa ("Close the connection:" + s);
dis.close () ;
dos.close ();
; so.close ();
} catch (IOException e) {
; Console.scriviStringa ("Caught exception:" + e.getMessage ());
;}
}}}
Integration 
