How to calculate java BufferedImage filesize

Question

I have a servlet based application that is serving images from files stored locally. I have added logic that will allow the application to load the image file to a Buffered

Answer 1

    BufferedImage img = = new BufferedImage(500, 300, BufferedImage.TYPE_INT_RGB);

    ByteArrayOutputStream tmp = new ByteArrayOutputStream();
    ImageIO.write(img, "png", tmp);
    tmp.close();
    Integer contentLength = tmp.size();

    response.setContentType("image/png");
    response.setHeader("Content-Length",contentLength.toString());
    OutputStream out = response.getOutputStream();
    out.write(tmp.toByteArray());
    out.close();