View Qrcode on screen in web application

Question

I have this code that generates the Qrcode of the Zxing library:

private static byte[] getQRCodeImage(String text, int width, int height) throws WriterException, IOException {
  QRCodeWriter qrCodeWriter = new QRCodeWriter();
  BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height);

  ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();
  MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream);
  byte[] pngData = pngOutputStream.toByteArray();
  return pngData;
}

It is returning an array of bytes.

I’m making a web application.

How do I display this array as an image on the screen?