public static String encodeToString(byte[] src) {
        return src == null ? null : Base64.getEncoder().encodeToString(src);
    }
public static String encodeToString ( byte [ ] src ) { return src == null ? null : Base64 . getEncoder ( ) . encodeToString ( src ) ; }
Encodes a byte array to a base 64 string.
@param src the byte array to encode
@return the base64 encoded string