string 轉byte[]

如1122轉{0x11,0x12}

public static byte[] hexString2Bytes(String s) {
        byte[] bytes;
        bytes = new byte[s.length() / 2];


        for (int i = 0; i < bytes.length; i++) {
            bytes[i] = (byte) Integer.parseInt(s.substring(2 * i, 2 * i + 2),
                    16);
        }


        return bytes;
    }

byte[]轉string:

如{0x11,0x12}轉1122

public static String bytesToHexString(byte[] src) {
StringBuilder stringBuilder = new StringBuilder();
if (src == null || src.length <= 0) {
return null;
}
char[] buffer = new char[2];
for (int i = 0; i < src.length; i++) {
buffer[0] = Character.forDigit((src[i] >>> 4) & 0x0F, 16);
buffer[1] = Character.forDigit(src[i] & 0x0F, 16);
System.out.println(buffer);
stringBuilder.append(buffer);
}
return stringBuilder.toString();
}