@RequestMapping(value = "/imageDisplay", method = RequestMethod.GET)
public void showImage(@RequestParam("id") Integer docId, HttpServletResponse response, HttpServletRequest request)
        throws ServletException, IOException, SQLException {

    Document doc = documentDao.get(docId);

    try {
        response.setHeader("Content-Disposition", "inline;filename="" + doc.getFilename() + """);
        OutputStream out = response.getOutputStream();
        response.setContentType(doc.getContentType());
        IOUtils.copy(doc.getContent().getBinaryStream(), out);

        // response.setContentType("image/jpeg, image/jpg, image/png, image/gif");
        int blobLength = (int) doc.getContent().length();
        byte[] blobAsBytes = doc.getContent().getBytes(1, blobLength);
        System.out.println(doc.getFilename());
        response.getOutputStream().write(blobAsBytes);

        // response.getOutputStream().close();}
        out.flush();
        out.close();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (SQLException e) {
        e.printStackTrace();
    }
}

Test1 : <img src="${pageContext.request.contextPath}/imageDisplay?id=3.html"/>

   Test2 : <img src="/Spring3HibernateIntegration/imageDisplay?id=3.html"/>