resttemplate

private static ResponseEntity<Object> postMethod(ResponseEntity<Object> responseEntity, RestTemplate restTemplate,
                                                     String url, HttpHeaders headers, Map<String, Object> pathParams,
                                                     Map<String, Object> param, MultiValueMap<String, String> queryParams) {
        if (queryParams.size() == 0) {
            headers.add("Content-Type", "application/json;charset=utf-8");
            headers.add("Accept", "application/json");
            headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
            HttpEntity<Map<String, Object>> httpEntity =
                    new HttpEntity<Map<String, Object>>(param, headers);
            responseEntity = restTemplate.exchange(url, HttpMethod.POST, httpEntity, Object.class, pathParams);
        } else {
            headers.add("Content-Type", "multipart/form-data");
            headers.add("Accept", "application/json");
            headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
            HttpEntity<MultiValueMap<String, String>> httpEntity =
                    new HttpEntity<MultiValueMap<String, String>>(queryParams, headers);
            responseEntity = restTemplate.exchange(url, HttpMethod.POST, httpEntity, Object.class);
        }
        return responseEntity;
    }