@RequestMapping(value = "/thumb/{courseId}", method = RequestMethod.GET)
 public void readthumb(
     @PathVariable int courseId, String width, String height, HttpServletResponse response) {
   Course course = courseDao.getCourse(courseId);
   String imagePath = course.getImageUrl();
   // PathUtils.readPhoto(imagePath, response);
   MagickPic magickPic = new MagickPic();
   byte[] bytes = magickPic.scaleImage(imagePath, width, height);
   try {
     OutputStream os = response.getOutputStream();
     os.write(bytes);
     os.flush();
   } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
   }
 }
 @RequestMapping(value = "/photo/{courseId}", method = RequestMethod.GET)
 public void readPhotos(@PathVariable int courseId, HttpServletResponse response) {
   Course course = courseDao.getCourse(courseId);
   String imagePath = course.getImageUrl();
   PathUtils.readPhoto(imagePath, response);
 }