@RequestMapping(value = "/contents", produces="application/json")
public @ResponseBody List<ContentVO> compare(@RequestParam("component") long componentId, Model model) throws ServiceException {
    List<Map<String, Object>> rawData = contentService.getContent(componentId);
    // throw some logging here
    List<ContentVO> list;
    try {
        list = ReflectionUtils.convert(rawData, ContentVO.class);
        // and throw some logging here
        return list;

    } catch (InstantiationException | IllegalAccessException e) {
        throw new ServiceException(e);
    }

@ExceptionHandler( ServiceException.class )
public String handleServiceException( ServiceException e ) {
    return e.getMessage();
}