Pemrograman Jaringan Dengan Java (Server)

Contoh Aplikasi Server :

SERVER

import java.io.*;

import java.net.*;

import java.util.*;

public class InfoServer{

private final int INFO_PORT=50000;

private String datafromClient;

/** InfoServer Constructor */

public InfoServer(){

BufferedReader inFromClient;

DataOutputStream outToClient;

Socket serverSocket;

try{

/* bind port 50000 ke alamat lokal*/

ServerSocket infoServer =

new ServerSocket(INFO_PORT);

System.out.println("Server telah siap...");

/* lakukan perulangan tanpa henti,

* sampai client memberikan perintah QUIT

*/

while (true){

/* masuk ke mode listening,

* server siap menerima permintaan dari client

*/

serverSocket = infoServer.accept();

System.out.println("Ada client" +

"yang terkoneksi!");

/* buat input stream dari socket

* dan juga sekaligus konversi dari

* byte stream ke character stream

* (InputStreamReader)

* BufferedReader akan memudahkan

* dalam pengolahan data karakter

*/

inFromClient =

new BufferedReader(

new InputStreamReader(

serverSocket.getInputStream()));

/* buat output stream ke socket*/

outToClient =

new DataOutputStream(

serverSocket.getOutputStream());

/* tulis welcome ke client */

outToClient.writeBytes("InfoServer versi 0.1\n"+

"hanya untuk testing..\n"+

"Silahkan berikan perintah TIME | NET | QUIT\n");

/* lakukan perulangan sampai client

* mengirimkan perintah QUIT

*/

boolean isQUIT = false;

while (!isQUIT){

/* baca data dari client*/

datafromClient=inFromClient.readLine();

if(datafromClient.startsWith("TIME")){

outToClient.writeBytes(new

Date().toString()+"\n");

}else if(datafromClient.startsWith("NET")){

outToClient.writeBytes(

InetAddress.getByName("localhost").toString()+

"\n");

}else if(datafromClient.startsWith("QUIT"))

{

isQUIT=true;

}

}

outToClient.close();

inFromClient.close();

serverSocket.close();

System.out.println("Koneksi client tertutup..");

}

}

catch(IOException ioe){

System.out.println("error:"+ioe);

}

catch(Exception e){

System.out.println("error:"+e);

}

}

/*program utama*/

public static void main(String[]args){

new InfoServer();

}

}

HASIL PROGRAM :

Tool Output :

Tool completed successfully