Try reversing these two lines:

response.setHeader("content-type","image/jpeg"); OutputStream outputStream = response.getOutputStream();

It may be that when the output stream is retrieved that the header lines are "fixed", although I thought that only happened when you actually wrote to the output stream.

Also, I think the suggestion to check yuor image by writing to a local file is a good idea just to make sure the image content is correct.

Finally, request the image url manually:

telnet host 80 GET /getphoto.jsp?photo_id=1 HTTP/1.0 <blank line>

to see if the header returned has the correct content-type.

HTH, tim.