spring ajax 처리 소스인데 이해가 가지않습니다.

Question

j$.ajax({ type: &#34;POST&#34;, url: &#34;/counsel/addCounsel&#34;, data: JSON.stringify(data), dataType: &#34;json&#34;, contentType : 'application/json', success: function(data, textStatus){ console.log(data); return; if (data.result &#61;&#61; &#34;0000&#34;) { //sangdam4UPayCd //location.href &#61; &#34;/order/orderCounselMain?intakeCd&#61;&#34; &#43; $(&#34;[name&#61;intakeCd]&#34;).val(); $(&#34;[name&#61;payType]&#34;).val($(&#34;#sangdam4UPayCd&#34;).val()); $(&#34;#postForm&#34;).submit(); } else { //alert(&#34;실패!!&#34;); } } });위소스가 ajax 소스이구요 &#64;RequestMapping(value&#61;&#34;/addCounsel&#34;, method&#61;RequestMethod.POST) public void addCounsel(&#64;RequestBody String jsonString, CounselDiagnosisDto counselDiagnosisDto, ModelMap model) { counselDiagnosisDto.setUserKey(UserDetailsHelper.getAuthenticatedUser().getUserKey()); counselDiagnosisDto.setRegId(UserDetailsHelper.getAuthenticatedUser().getUserId()); counselDiagnosisDto.setClientCd(UserDetailsHelper.getAuthenticatedUser().getClientCd()); counselService.addDiagnosis(jsonString, counselDiagnosisDto); }위소스가 controller 소스입니다 try { JSONParser jsonParser &#61; new JSONParser(); JSONObject jsonObject &#61; (JSONObject) jsonParser.parse(jsonString); JSONArray answerList &#61; (JSONArray) jsonObject.get(&#34;answerList&#34;); counselDiagnosisDto.mappingCounselDiagnosis(jsonObject, answerList.size()); counselMapper.addCounselDagnosis(counselDiagnosisDto); for (int i &#61; 0; i < answerList.size(); i&#43;&#43;) { JSONObject answerInfo &#61; (JSONObject) answerList.get(i); counselDiagnosisDto.mappingCounselAnswer(answerInfo); counselMapper.addDiagnosisAnswer(counselDiagnosisDto); } } catch (ParseException e) { throw new RuntimeException(); }위소스가 service 소스입니다 제가 여기서 너무 궁금한게 return 해주는곳이 없는데 스크립트에서 data.result &#61;&#61; &#34;0000&#34; 일때 로직이 있어서 console로 data를 찍어봤더니 result 하고 counselDiagnosisDto 데이터가 출력 되더라구요 이데이터를 어떻게 받는건지 너무 궁금합니다....

spring ajax 처리 소스인데 이해가 가지않습니다.

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