How can I write a read a data on a SmartCArd

Question

Hi everyone...
I would like to know. how I can write and read a data on a SmartCard maybe through a file(IO)
could you helpme please??
Thanks a lot...
Marcos

Answer 1

Try this mate
package com.reader;
import java.util.List;
import javax.smartcardio.Card;
import javax.smartcardio.CardChannel;
import javax.smartcardio.CardException;
import javax.smartcardio.CardTerminal;
import javax.smartcardio.CardTerminals;
import javax.smartcardio.CommandAPDU;
import javax.smartcardio.ResponseAPDU;
import javax.smartcardio.TerminalFactory;
import com.sun.javacard.apduio.Apdu;
* @author ic008391
public class Connector extends Thread
     * @param args
     * @param args
     public static void main(String[] args)
          List<CardTerminal> lct = null;
          Card crd = null;
          TerminalFactory tf = TerminalFactory.getDefault();
          CardTerminals cts = tf.terminals();
          CardChannel cch = null;
          try
               //create APDU Command
               Apdu apdu = new Apdu();
               apdu.command[Apdu.CLA] = (byte) 0X00;
               apdu.command[Apdu.INS] = (byte) 0XA4;
               apdu.command[Apdu.P1] = (byte) 0X04;
               apdu.command[Apdu.P2] = (byte) 0X00;
               //apdu.command[Apdu.P3] = (byte) 0X0a;
               byte[] data = {(byte)0xa0, (byte)0x0, (byte)0x0, (byte)0x0, (byte)0x62, (byte)0x3, (byte)0x1, (byte)0xc, (byte)0x6, (byte)0x1, (byte)0x7F};
//wallet 0xa0:0x0:0x0:0x0:0x62:0x3:0x1:0xC:0x6
// select 0x00 0xA4 0x04 0x00 0x0a 0xa0 0x0 0x0 0x0 0x62 0x3 0x1 0xc 0x6 0x1 0x7F
               lct = cts.list();
               System.out.println(lct);
               CardTerminal ct = lct.get(0);
               crd = ct.connect("T=0"); //Or "T=1"
               javax.smartcardio.ATR atr = crd.getATR();
               byte i[] =atr.getBytes();
               for (int n = 0; n < i.length; n++) {
          int x = (int) (0x000000FF & i[n]); // byte to int conversion
          String s = Integer.toHexString(x).toUpperCase();
          if (s.length() == 1) s = "0" + s;
          System.out.print(s + " ");
               System.out.println("");
               System.out.println("ATR"+(atr.getHistoricalBytes()).toString());
               System.out.println("ATR"+atr.toString());
               cch = crd.getBasicChannel();
               sleep(1000);
               ResponseAPDU r;
               //r = cch.transmit(new CommandAPDU(apdu.getCommand()));
               r = cch.transmit(new CommandAPDU(0,164,4,0,data));
               System.out.println(apdu);
               System.out.println(r);
               //Get Balance
               //0xB0 0x50 0x00 0x00 0x00 0x02;
               r = cch.transmit(new CommandAPDU(176,80,0,0));
               System.out.println(r);
               //cch.close();
          catch (CardException e)
               // TODO Auto-generated catch block
               e.printStackTrace();
          catch (InterruptedException e)
               // TODO Auto-generated catch block
               e.printStackTrace();
          finally
               try
                    crd.disconnect(true);
               catch (CardException e)
                    // TODO Auto-generated catch block
                    e.printStackTrace();
}