使用RestTemplate将请求发送到RestAPI，给我一个空响应

Question

我想使用RESTTemplate将POST请求发送到RestAPI。当我执行下面的代码时，它给出了null响应。但是，我得到了http状态代码200 OK。我已经适当地添加了响应模型，所以模型没有问题。甚至，当我将响应类型更改为String时，它也不给我响应。有什么建议吗？

MultiValueMap<String, String> headers = new LinkedMultiValueMap<String, String>();
               headers.add("Authorization", "Basic " + "c21sOnBhc3N3b3Jk");
               headers.add("Content-Type", "application/json");

               RestTemplate restTemplate = new RestTemplate();
               restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());

               HttpEntity<NikeIdgenReq> request = new HttpEntity<NikeIdgenReq>(nikeIdgenReq, headers);

               String resp = restTemplate.postForObject(url, request, String.class);

Answer 1

在Googleing之后，我找到了一个解决方案，使响应模型类可序列化，并添加JsonProperty注释，如下代码所示

public class NikeIdgenRes implements Serializable{

    @JsonProperty("bundleID")
    private String bundleID;
    @JsonProperty("ids")
    private List<Id> ids = null;
    @JsonProperty("gtin")
    private String gtin;
    @JsonProperty("quantity")
    private Integer quantity;
    @JsonProperty("types")
    private List<String> types = null;
    @JsonProperty("meta")
    private Meta meta;

    // getters & setters
    }

public NikeIdgenRes addNikeIdgen(NikeIdgenRq nikeIdgenRq) { 

            String url = "https://idgen-dev.connected-product.edflab.nikecloud.net/sensors/id_bundle/v1";

            HttpEntity<NikeIdgenRq> httpEntity = new HttpEntity<>(nikeIdgenRq, getHttpHeaders());
            ResponseEntity<NikeIdgenRes> result = restTemplateBuilder.build().postForEntity(url, httpEntity, NikeIdgenRes.class);

            NikeIdgenRes nikeIdgenRes = new NikeIdgenRes();
            nikeIdgenRes.setBundleID(result.getBody().getBundleID());
            nikeIdgenRes.setIds(result.getBody().getIds());
            nikeIdgenRes.setGtin(result.getBody().getGtin());
            nikeIdgenRes.setQuantity(result.getBody().getQuantity());
            nikeIdgenRes.setTypes(result.getBody().getTypes());
            nikeIdgenRes.setMeta(result.getBody().getMeta());

           return nikeIdgenRes;
       }