Generic function for Post Data with some headers in spring

 public <T,K> K postApiCall(T t, HttpHeaders headers, String url, Class<K> resposne){

        try {

            RestTemplate restTemplate = new RestTemplate();

            headers.add("Content-Type","application/json");

            HttpEntity<T> entity = new HttpEntity<T>(t, headers);

            ResponseEntity<K> result = restTemplate.exchange(url, HttpMethod.POST, entity, resposne);

            System.out.println(result.getBody());

            return result.getBody();

        }catch (Exception ee){

            ee.printStackTrace();

        }

        return null;

    }