Read/convert/write images using ImageIO

Hello,

I am creating a  servlet that will read an image, convert it to a jpeg and store it as a BLOB in MySQL.   I am new to java and am currently testing how to manipulate images before I tackle the next part of storing it in the DB

So far I am just trying to read either a GIF or JPG image and write it back out to the browser as a JPG.  So far I have:

InputStream in = f.getInputStream();
System.out.println(f.getFileName());
BufferedImage image = ImageIO.read(in);
response.setContentType("image/jpeg");
ImageIO.write(image,"JPEG",response.getOutputStream());

If I test this uisng a jpeg it works fine, but when I try to load a gif I get back a file encoding error in the browser.   I know that the GIF is getting read properly as I can inspect in memory and it looks fine.

Do I need to use a special encoder that can transcode the gif data?    I was under the impression that once the image is in the BufferedImage format it could be written in any way.

I'm missing something, but just dont know what.

Eventually I will need to scale the image before I save/send it.

Thanks,
Scott