BufferedImgToByteArray.java

//Buffered Image nesnesini Base64 encoded stringe dönüştürmek için
public static String bufferedImgToBase64String(final BufferedImage img, final String formatName) {
        final ByteArrayOutputStream os = new ByteArrayOutputStream();
        try {
            ImageIO.write(img, formatName, Base64.getEncoder().wrap(os));
            return os.toString(StandardCharsets.ISO_8859_1.name());
        } catch (final IOException ioe) {
            throw new UncheckedIOException(ioe);
        }
    }

//Buffered Image nesnesini byte dizisine dönüştürmek için.
public static byte[] bufferedImgToByteArray(final BufferedImage img, final String formatName) {
        final ByteArrayOutputStream os = new ByteArrayOutputStream();
        try {
            ImageIO.write(img, formatName, os);
            return os.toByteArray();
        } catch (final IOException ioe) {
            throw new UncheckedIOException(ioe);
        }
    }