RestTemplate发送中文参数乱码问题

HttpHeaders headers = new HttpHeaders();
MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");
headers.setContentType(type);
headers.add("Accept", MediaType.APPLICATION_JSON.toString());

JSONObject jsonObj = JSONObject.fromObject(params);

HttpEntity<String> formEntity = new HttpEntity<String>(jsonObj.toString(), headers);

String result = restTemplate.postForObject(url, formEntity, String.class);