Pembuatan Aplikasi Client

Penulisan kode untuk implementasi client ini lebih mudah, karena kita hanya akan mencoba mengirimkan request message saja. Sekarang mari kita buat sebuah Java Class dengan nama ClientISO.java yang kode-nya seperti dibawah ini :

1. id.web.martinusadyh.iso8583.socket.ClientISO.java
   
   

   Java

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   package id.web.martinusadyh.iso8583.socket; import id.web.martinusadyh.iso8583.helper.ISOUtil; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; import java.net.UnknownHostException; import java.text.SimpleDateFormat; import java.util.Date; /** * * @author Martinus Ady H <mrt.itnewbies@gmail.com> */ public class ClientISO {     private final static Integer PORT_SERVER = 12345;     /**      * @param args the command line arguments      */     public static void main(String[] args) throws UnknownHostException, IOException {         Socket clientSocket = new Socket("localhost", PORT_SERVER);         String networkRequest = buildNetworkReqMessage();         PrintWriter outgoing = new PrintWriter(clientSocket.getOutputStream());         InputStreamReader incoming = new InputStreamReader(clientSocket.getInputStream());         outgoing.print(networkRequest);         outgoing.flush();         int data;         StringBuffer sb = new StringBuffer();         int counter = 0;         // tambahan 4 karakter karena msg header adalah 4 digit msg length         int lengthOfMsg = 4;         while((data = incoming.read()) != 0) {             counter++;             sb.append((char) data);             if (counter == 4) lengthOfMsg += Integer.valueOf(sb.toString());             // klo panjang msg dari MTI sampai END OF MSG sama dengan nilai             // header maka lanjutkan ke method processingMsg();             if (lengthOfMsg == sb.toString().length()) {                 System.out.println("Rec. Msg ["+sb.toString()+"] len ["+sb.toString().length()+"]");             }         }         outgoing.close();         incoming.close();         clientSocket.close();     }     private static String buildNetworkReqMessage() {         StringBuilder networkReq = new StringBuilder();                  // MTI 1800         networkReq.append("1800");         // untuk request, DE yang aktif adalah DE[3,7,11,12,13,48 dan 70]         String bitmapReq = ISOUtil.getHexaBitmapFromActiveDE(new int[] {3,7,11,12,13,48,70});         networkReq.append(bitmapReq);         // DE 3 processing code         networkReq.append("000001");         // DE 7 transmission date and time         networkReq.append(new SimpleDateFormat("yyyyMMdd").format(new Date()));         // DE 11 system trace audit number         networkReq.append("000001");         // DE 12 local time transaction         networkReq.append(new SimpleDateFormat("HHmmss").format(new Date()));         // DE 13 local time transaction         networkReq.append(new SimpleDateFormat("MMdd").format(new Date()));         // DE 48 Additional Private Data         final String clientID = "CLNT001";         // length de 48         String lengthBit48 = "";         if (clientID.length() < 10) lengthBit48 = "00" + clientID.length();         if (clientID.length() < 100 && clientID.length() >= 10) lengthBit48 = "0" + clientID.length();         if (clientID.length() == 100) lengthBit48 = String.valueOf(clientID.length());         networkReq.append(lengthBit48);         networkReq.append(clientID);         // DE 70 Network Information Code         networkReq.append("001");         // tambahkan 4 digit length of msg sbg header         String msgHeader = "";         if (networkReq.toString().length() < 10) msgHeader = "000" + networkReq.toString().length();         if (networkReq.toString().length() < 100 && networkReq.toString().length() >= 10) msgHeader = "00" + networkReq.toString().length();         if (networkReq.toString().length() < 1000 && networkReq.toString().length() >= 100) msgHeader = "0" + networkReq.toString().length();         if (networkReq.toString().length() >= 1000) msgHeader = String.valueOf(networkReq.toString().length());         StringBuilder finalNetworkReqMsg = new StringBuilder();         finalNetworkReqMsg.append(msgHeader);         finalNetworkReqMsg.append(networkReq.toString());                  return finalNetworkReqMsg.toString();     } }

Jika sudah, sekarang lakukan-lah proses Clean and Build pada NetBeans dengan menekan kombinasi tombol SHIFT+F11 dan harusnya tidak ada pesan kesalahan yang akan ditimbulkan

SUMBER Referensi : http://martinusadyh.web.id dan wikipedia