JavaCard helloworld applet

package com.hellogv.testIO; import javacard.framework.APDU; import javacard.framework.Applet; import javacard.framework.ISO7816; import javacard.framework.ISOException; import javacard.framework.Util; public class mytest extends Applet { private static final byte[] strHello= { (byte) 'H', (byte) 'e', (byte) 'l', (byte) 'l', (byte) 'o'}; private static final byte[] strWorld = {(byte) 'W', (byte) 'o', (byte) 'r', (byte) 'l', (byte) 'd', }; private static final byte CMD_CLA = (byte) 0x80; private static final byte CMD_INS_1 = (byte) 0x10; private static final byte CMD_INS_2 = (byte) 0x20; public static void install(byte[] bArray, short bOffset, byte bLength) { // GP-compliant JavaCard applet registration new mytest().register(bArray, (short) (bOffset + 1), bArray[bOffset]); } /* * 当Java卡Applet被选中时，由JCRE调用。Java卡Applet可以定义select()完成初始化， * 否则，JCRE调用父类的select()。 * @see javacard.framework.Applet#select() */ public boolean select() { short debug=100; debug++;//用于断点调试，当被select时触发。 return super.select(); } /* * 当Java卡Applet被放弃时，由JCRE调用。Java卡Applet可以定义deselect()完成清除， * 否则，JCRE调用父类的deselect()。 * @see javacard.framework.Applet#deselect() */ public void deselect() { short debug=100; debug++;//用于断点调试 super.deselect(); } /* * 每次收到APDU命令，都会执行 * @see javacard.framework.Applet#process(javacard.framework.APDU) */ public void process(APDU apdu) { if (selectingApplet()) { return; } //获取外部终端发过来的数据 byte[] buffer = apdu.getBuffer(); //获取第一位数据 byte CLA = (byte) (buffer[ISO7816.OFFSET_CLA] & 0xFF); //获取第二位数据 byte INS = (byte) (buffer[ISO7816.OFFSET_INS] & 0xFF); if (CLA != CMD_CLA) {//格式不对 ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED); } switch (INS) { case CMD_INS_1: sendBytes(apdu,strHello); break; case CMD_INS_2: sendBytes(apdu,strWorld); break; default: ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED); } } private void sendBytes(APDU apdu,byte[] arrays) { byte[] buffer = apdu.getBuffer(); short length = (short) arrays.length; Util.arrayCopyNonAtomic(arrays, (short) 0, buffer, (short) 0, (short) length); apdu.setOutgoingAndSend((short) 0, length); } }