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public static void main(String[] args) {

    TerminalFactory factory = TerminalFactory.getDefault();//得到一個預設的讀卡器工廠(迷。。)

    List<CardTerminal> terminals;

    try {

        terminals = factory.terminals().list();//從工廠獲得插在電腦上的讀卡器列表

        terminals.stream().forEach(s->System.out.println(s));//列印獲取到的讀卡器名稱

        e.printStackTrace();

    }

}

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private static final char[] HEX_CHAR = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

public static String bytesToHexString(byte[] bytes) {

    StringBuilder sb = new StringBuilder();

    int a = 0;

    for (byte b : bytes) { // 使用除與取餘進行轉換

        if (b < 0) {

            a = 256 + b;

        } else {

            a = b;

        }

        //sb.append("0x");

        sb.append(HEX_CHAR[a / 16]);

        sb.append(HEX_CHAR[a % 16]);

        //sb.append(" ");

    }

    return sb.toString().toUpperCase();

}

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CommandAPDU getUID = new CommandAPDU(0xFF, 0xCA, 0x00, 0x00,0x04);//構造一個APDU指令，期望得到4byte序列號

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public static void main(String[] args) {

    TerminalFactory factory = TerminalFactory.getDefault();

    List<CardTerminal> terminals;

    try {

        terminals = factory.terminals().list();//get讀卡器列表

        CardTerminal a = terminals.get(0);//使用第0個讀卡器[暫且不考慮同時插N個讀卡器的情況了]

        a.waitForCardPresent(0L);//等待放置卡片

        Card card = a.connect("T=1");//連線卡片，協議T=1 塊讀寫(T=0貌似不支援，一用就報錯)

        CardChannel channel = card.getBasicChannel();//開啟通道

        CommandAPDU getUID = new CommandAPDU(0xFF, 0xCA, 0x00, 0x00,0x04);//中文API第12頁

        ResponseAPDU r = channel.transmit(getUID);//傳送getUID指令

        System.out.println("UID: " + bytesToHexString(r.getData()));

    } catch (Exception e) {

        e.printStackTrace();

    }

}

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byte[] pwd = {(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff};//先用一個數組把金鑰存起來~

CommandAPDU loadPWD = new CommandAPDU(0xFF, 0x82, 0x00, 0x00, pwd,0,6);//然後構造一個載入金鑰APDU指令~

ResponseAPDU r = channel.transmit(loadPWD);//傳送loadPWD指令

System.out.println("result: " + Utils.handleUID(r.getBytes()));

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byte[] check = {(byte)0x01,(byte)0x00,(byte)0x08,(byte)0x60,(byte)0x00};//認證資料位元組，包含了需要認證的區塊號、金鑰型別和金鑰儲存的地址(金鑰號)

CommandAPDU authPWD = new CommandAPDU(0xFF, 0x86, 0x00, 0x00, check,0,5);//加上指令頭部，構造出完整的認證APDU指令.

ResponseAPDU r = channel.transmit(authPWD);//傳送認證指令

System.out.println("result: " + Utils.handleUID(r.getBytes()));//列印返回值

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CommandAPDU getData = new CommandAPDU(0xFF, 0xB0, 0x00, 0x08,0x10);//構造讀區塊APDU指令,讀第八個區塊(2扇區0區塊)值

ResponseAPDU r = channel.transmit(getData);//傳送讀區塊指令

System.out.println("data: " + Utils.handleUID(r.getBytes()));//列印返回值

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byte[] up = {(byte)0x00,(byte)0x01,(byte)0x02,(byte)0x03,(byte)0x04,(byte)0x05,(byte)0x06,(byte)0x07,(byte)0x08,(byte)0x09,(byte)0x0A,(byte)0x0B,(byte)0x0C,(byte)0x0D,(byte)0x0E,(byte)0x0F};

CommandAPDU updateData = new CommandAPDU(0xFF, 0xD6, 0x00, 0x08,up,0,16);

ResponseAPDU r = channel.transmit(updateData);//傳送寫塊指令

System.out.println("response: " + Utils.bytesToHexString(r.getBytes()));//列印返回值