RestTemplate 发送 json 请求

JSONObject json = new JSONObject();
json.put("train_date", train_date);
json.put("from_station", fromStationCode);
json.put("to_station", toStationCode);
json.put("logFlag", logFlag);

HttpHeaders headers = new HttpHeaders();
MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");
headers.setContentType(type);
headers.add("Accept", MediaType.APPLICATION_JSON.toString());
HttpEntity<String> formEntity = new HttpEntity<String>(json.toString(), headers);
String s= restTemplate.postForEntity(url,formEntity,String.class).getBody();