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我正在尝试通过发送直接命令来使用 java 访问我的 ACR122u。奇怪的是我没有得到任何响应，也没有错误。这是我的代码：

final static int IOCTL_SMARTCARD_ACR122_ESCAPE_COMMAND = 0x003136B0;

.....

List<CardTerminal>  terminals   = null; 
TerminalFactory factory         = TerminalFactory.getDefault();
terminals                       = factory.terminals().list();

CardTerminal terminal   = terminals.get(0);
Card card               = terminal.connect("direct");

CardChannel channel     = card.getBasicChannel();

byte[] commandAPDU      = {(byte) 0xD4, 0x06, 0x63, 0x05, 0x63, 0x0D, 0x63, 0x38 }; 
byte[] responseAPDU     = card.transmitControlCommand(IOCTL_SMARTCARD_ACR122_ESCAPE_COMMAND, commandAPDU );             

System.out.println(bytesToHex(responseAPDU) + "...");

有没有人知道这种情况的原因？

提前谢谢了！

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1 回答 1

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最后，我有解决方案。如果有其他人有同样的问题，我会回答我自己的问题。

错误是我只在这里发送消息。您已经定义了new CommandAPDU()类、INS、P1、P2。除此之外，您不需要定义，Lc 因为 javac 将为我们执行此操作。transmitControlCommand你确实需要Lc定义. 因此，有了这些知识，新的（工作）代码是：

List<CardTerminal>  terminals   = null; 
TerminalFactory factory         = TerminalFactory.getDefault();
terminals                       = factory.terminals().list();

CardTerminal terminal   = terminals.get(0);
Card card               = terminal.connect("direct");

CardChannel channel     = card.getBasicChannel();

//Read register
byte[] commandAPDU1     = {(byte)0xFF,0x00,0x00,0x00,0x08,  (byte)0xD4, 0x06, 0x63, 0x05, 0x63, 0x0D, 0x63, 0x38 }; 
byte[] responseAPDU1    = card.transmitControlCommand(IOCTL_SMARTCARD_ACR122_ESCAPE_COMMAND, commandAPDU1 );                

System.out.println(bytesToHex(responseAPDU1) + "...");
//Response: D5070707059000...
于 2014-07-15T20:04:57.773 回答