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//16进制字符串转byte数组
public static byte[] Hex2Byte(String inHex) {

    String[] hex = stringToStringArray(inHex,2);
    byte[] byteArray = new byte[hex.length];

    for (int i = 0; i < hex.length; i++) {
        //parseInt()方法用于将字符串参数作为有符号的n进制整数进行解析
        byteArray[i] = (byte) Integer.parseInt(hex[i], 16);
    }

    return byteArray;
}

public static String[] stringToStringArray(String src, int length) {
    //检查参数是否合法
    if (null == src || src.equals("")) {return null;}
    if (length <= 0) {return null;}

    int n = (src.length() + length - 1) / length; //获取整个字符串可以被切割成字符子串的个数
    String[] split = new String[n];
    for (int i = 0; i < n; i++) {
        if (i < (n - 1)) {
            split[i] = src.substring(i * length, (i + 1) * length);
        } else {
            split[i] = src.substring(i * length);
        }
    }
    return split;
}