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记录如何将16进制字符串转化为字节数组

public static byte[] hexStr2Bytes(String paramString) {
        int i = paramString.length() / 2;

        byte[] arrayOfByte = new byte[i];
        int j = 0;
        while (true) {
            if (j >= i)
                return arrayOfByte;
            int k = 1 + j * 2;
            int l = k + 1;
            arrayOfByte[j] = (byte) (0xFF & Integer.decode(
                    "0x" + paramString.substring(j * 2, k)
                            + paramString.substring(k, l)));
            ++j;
        }
    }

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