我正在使用rest模板调用外部url；
下面是我的React模式

class College{
   private int id;
   private String name;
 -----
}

class ResponseModel <T>{
  private int response;
  private  List<T> data;
}

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
HttpEntity<Model> entity = new HttpEntity<>(model, headers);

我试过的第一种方法

ParameterizedTypeReference<ResponseModel<College>> typeRef = new ParameterizedTypeReference<ResponseModel<College>>() {};
             ResponseEntity<ResponseModel<College>> responseEntity = restTemplate.exchange(serverUrl, HttpMethod.POST, entity, typeRef);
             ResponseModel<College> responseData = responseEntity.getBody();

我试过的第二种方法

ResponseModel<College> responseData  = restTemplate.postForObject(serverUrl,entity,ResponseModel.class)

List<College> college = responseData.getData()

我没有得到我的列表对象。当我打印responsedata时，它在列表中显示数据，但当我在college对象中获取列表时，它显示所有键为空。