The simple way of adding an image that Bear alluded to is the <img> tag. The JSP would add that tag along with whatever other text information you want to display.
What's left to think about is what URL you would use in the image tag so that the appropriate image can be loaded. It could be something like "http://myserver.com/myApp/imageServlet?id=12345678", and "imageServlet" would be mapped to a servlet that retrieves the image data and streams back the image to the browser. (The CodeBarn actually has an example servlet that streams an image to the client.)