这个问题在这里已有答案：
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.smartcardio.ATR;
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;
@SuppressWarnings("restriction")
public class APDu {
static FileOutputStream fos = null;
private static byte[] SELECT = {
(byte) 0x00, ////CLA
(byte) 0xA4, ////INS
(byte) 0x04, ////P1
(byte) 0x00, ////P2
(byte) 0x07, ////Length of AID
(byte) 0xA0, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x34, (byte) 0x49, (byte) 0x44, (byte) 0x43};
private static byte[] select_dataSet = {
(byte) 0x00, ////CLA
(byte) 0xA4, ////INS
(byte) 0x04, ////P1
(byte) 0x00, ////P2
(byte) 0x01, ////Length of AID
(byte) 0x11 }; ///////////worked
private static byte[] read_dataSet = {
(byte) 0x00, ////CLA
(byte) 0xB0, ////INS
(byte) 0x00, ////P1
(byte) 0x00, ////P2 this is the offset
(byte) 0x00, ////
(byte) 0x00,
(byte) 0xFF
};
private static CommandAPDU SELECT_APDU = new CommandAPDU(SELECT);
private static CommandAPDU select_dataSetAPDU = new CommandAPDU(select_dataSet);
private static CommandAPDU read_dataSetAPDU = new CommandAPDU(read_dataSet);
private static CardTerminal cardTerminal = null;
private static void arrayPrint(byte[] data) {
System.out.print("{");
arrayPrintBytes(data);
System.out.print("} (");
arrayPrintHex(data);
System.out.print(")");
}
private static void arrayPrintHex(byte[] data) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < data.length; i++) {
String bs = Integer.toHexString(data[i] & 0xFF);
if (bs.length() == 1)
sb.append(0);
sb.append(bs).append(" ");
}
System.out.print( sb.toString() );
}
private static void arrayPrintBytes(byte[] data) {
for(int i=0; i < data.length; i++)
System.out.print(data[i]+ " ");
}
public static boolean sendAPDU(CardChannel ch, CommandAPDU apdu,boolean write) throws CardException {
System.out.println("sent these ::: ");arrayPrintHex(apdu.getBytes());
ResponseAPDU responseAPDU = ch.transmit(apdu);
byte[] response = responseAPDU.getBytes();
System.out.print("\n"+responseAPDU.toString()+" (Nr:"+responseAPDU.getNr() +" SW:"+responseAPDU.getSW()+" SW1:"+responseAPDU.getSW1() +" SW2:"+responseAPDU.getSW2()+")");
System.out.print("Bytes received: "); arrayPrint( responseAPDU.getBytes());
System.out.print("Data received: "); arrayPrint( responseAPDU.getData());
if(write){
}
if(write){
try {
System.out.println("\n\nbytes ::: ");arrayPrintHex(responseAPDU.getData());
fos.write(responseAPDU.getData());
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
//Check if response is 0x9000 (code for success)
return (response[response.length - 2] == (byte) 0x90 && response[response.length - 1] == (byte) 0x00);
}
public APDu() {
}
public static void main(String[] args) throws Exception {
File f = new File("dataBytes.dat");
fos = new FileOutputStream(f,true);
TerminalFactory tf = TerminalFactory.getDefault();
CardTerminals ct = tf.terminals();
cardTerminal = ct.list().get(0);
System.out.println("Selected terminal");
if(cardTerminal==null)
throw new Exception("ERROR: No cardterminal available to communicate.");
try {
while (cardTerminal.isCardPresent()) {
Card card = null;
if ((card = cardTerminal.connect("*")) != null){
System.out.println("Connected to card.");
} else {
System.out.println("ERROR: Failed to connect to card!");
return;
}
System.out.print("ATR: "); arrayPrint(((ATR) card.getATR()).getBytes()); System.out.println();
CardChannel ch = card.getBasicChannel();
//open session
if (sendAPDU(ch, SELECT_APDU,false)){
System.out.println("\nReceived data.");
} else {
System.out.println("\nERROR: Unable to get data!");
return;
}
//select data set
if (sendAPDU(ch, select_dataSetAPDU,false)){
System.out.println("\nReceived data.");
} else {
System.out.println("\nERROR: Unable to get data!");
return;
}
//select read data set
if (sendAPDU(ch, read_dataSetAPDU,true)){
System.out.println("\nReceived data.");
} else {
System.out.println("\nERROR: Unable to get data!");
return;
}
fos.close();
return;
}
} catch (CardException e) {
System.out.println("Error isCardPresent()" + e.getCause());
}
}
}
http://i.stack.imgur.com/IvQHZ.png
在上面的链接：
左边的数据是我应该从智能卡读取的实际数据，另一边是我从卡上读取的数据 . 我只能读取326字节中的255个字节::::
从00-255数据和2字节状态字
我怎样才能读取剩余的字节 .
================================================== ======================以下是我的代码的输出：
选定的终端连接到卡 . ATR：{59 -1 -107 0 -1 -64 10 49 -2 77 -128 49 -32 107 4 32 5 2 82 85 85 85 85 85 85 -106}（3b ff 95 00 ff c0 0a 31 fe 4d 80 31 e0 6b 04 20 05 02 52 55 55 55 55 55 55 96）
Command ::: 00 a4 04 00 07 a0 00 00 00 34 49 44 43 ---命令打开会话
ResponseAPDU：2个字节，SW = 9000（Nr：0 SW：36864 SW1：144 SW2：0）接收的字节数：{-112 0}（90 00）接收的数据：{}（）接收的数据 .
command ::: 00 a4 04 00 01 11 ---命令选择 Headers id：11
ResponseAPDU：25个字节，SW = 9000（Nr：23 SW：36864 SW1：144 SW2：0）接收的字节数：{1 17 6 94 1 70 1 10 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 - 112 0}（01 11 06 5e 01 46 01 0a 00 00 00 00 00 00 00 0a 00 00 00 00 00 00 00 00 00）收到的数据：{1 17 6 94 1 70 1 10 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0}（01 11 06 5e 01 46 01 0a 00 00 00 00 00 00 00 0a 00 00 00 00 00 00 00）接收数据 .
command ::: 00 b0 00 00 00 00 ff ---命令读取
ResponseAPDU：257字节，SW = 9000（Nr：255 SW：36864 SW1：144 SW2：0）
06 5e是要接收的最大数据，01 46是可用数据 . 我已经阅读了255个字节，我只需要读取剩余的44个字节 . 什么是检索剩余字节的下一个偏移量 .
2 回答
扩展APDU允许以更有效的方式将大量数据发送到卡，进行适当处理并发送回终端 . 无需重新发出多个APDU消息来完成需要大量数据的操作，并要求开发人员对应用程序进行编码以保持跨多个APDU命令的状态，扩展APDU允许applet更有效地执行此功能 . 大型APDU交换 .
使用this reference获取更多信息 .
UPDATE:
在本参考文献中，有一个循序渐进的guid来编写一个利用扩展长度的applet . 请注意，applet应该实现
javacardx.apdu.ExtendedLength接口 .你也可以使用
C0 00 00 XX，其中XX通常是SW2的优惠答案 . 那是因为该卡正在使用T=0协议 .例如，如果响应是
61 09，则发送00 C0 00 00 09，直到响应变为90 00. 当然每次你应该用之前的回复替换XX.要读取> 255字节的大二进制数据，必须实现链接协议 . 请查看以下链接：
Reading big file from a javacard applet
https://community.oracle.com/thread/2207556?tstart=0