Display BLOB image with JSTL

[romain.vdk]

Hi everybody,

I've a little problem: I wrote an application that uploads an image in a MySQL blob. It worksd fine. But I cannot retreive and display it ... I show you what I've done :

Controller:

    @RequestMapping("show")
    public ModelAndView show(HttpServletRequest req) {
	if (logger.isDebugEnabled()) {
	    logger.debug("Display image with id " + req.getParameter("id"));
	}
	ModelAndView mav = null;
	if (req.getParameter("id") == null || req.getParameter("id").length() == 0) {
	    return null;
	} else {
	    try {
		Integer id = Integer.parseInt(req.getParameter("id"));
		WebPicture wp = webPictureDao.get(id);
		mav = new ModelAndView("showPicture");
		if (logger.isDebugEnabled()) {
		    logger.debug("serving data : " + wp.getData());
		}
		OutputStream os = new ByteArrayOutputStream();
		// wp.getData() = byte[]
		os.write(wp.getData());
		mav.addObject("data", os);
	    } catch (NumberFormatException ex) {
		return null;
	    } catch (Exception e) {
		logger.warn("Unable to fetch picture with id " + req.getParameter("id"), e);
	    }
	}
	return mav;
    }

Then, to display it I simply wrote this:

<%@ page language="java" contentType="image/jpeg" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:out value="${data}" />

But when I visit the page to display the image, that just displays the url I entered (I think this is because firefox write a complete html page with an img tag in the body, and the url as alt attribute)

Any idea of what's wrong?

thanks!

[romain.vdk]

I solved the problem.

Thanks for the help

[vvairam]

what was the fix;

I saw in spring sample application they were using img tag

<img src="imageContent?name=<%= image.getName() %>

[edurastogi]

I am having similar problem, I want to load a blob impage file in jsp. There will be many blob files which will be shown in one jsp. How did this display problem was solved?
Thanks for the help
Adi

[MartyJones]

Typically, you use the <img> tag and specify the src="<path to a controller>". The "path to a controller" streams back the bytes of the image.

[edurastogi]

Thanks MartyJones. Your suggestion was helpful. I was able to reach similar conclusion after some google searching and thinking. But i could not decide weather my solution was right or not. Your anser made me comfortable to use this solution. Thanks.