@RequestMapping(value = "", method = RequestMethod.GET)
 @ResponseBody
 public List<WordDto> get(HttpServletRequest request) throws UnsupportedEncodingException {
   RequestHelper requestHelper = new RequestHelper(request);
   Map<String, String> params = requestHelper.getParams();
   String sentence = params.get("sentence");
   return segmentService.segment(sentence, params);
 }
 @RequestMapping(value = "", method = RequestMethod.POST)
 public void post(
     @RequestBody String sentence, HttpServletRequest request, HttpServletResponse response)
     throws IOException {
   RequestHelper requestHelper = new RequestHelper(request);
   Map<String, String> params = requestHelper.getParams();
   String contentType = request.getContentType();
   String result = SegmentByContentType(sentence, params, contentType);
   response.setContentType("application/json; charset=utf-8");
   PrintWriter writer = response.getWriter();
   writer.append(result);
 }