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所以我正在开发一个 REST 客户端，它使用 REST API 来使用 Spring RestTemplate 获取 JSON 对象。所以我得到一个 HTTP 200 OK 响应，但类对象内的列表（设备）为空。但是会获取其他字段。当我使用 Postman 执行相同的请求时，它运行良好。这可能是什么原因？

RestTemplate 代码片段：

    RestTemplate restTemplate = new RestTemplate();
    HttpHeaders requestHeaders = new HttpHeaders();
    requestHeaders.add("Content-Type", "application/json");
    requestHeaders.add("Authorization", "Bearer " + apiToken);
    HttpEntity entity = new HttpEntity(requestHeaders);
    ResponseEntity<CloverMerchant> response = restTemplate.exchange(getMerchantDetailsUrl, HttpMethod.GET, entity, CloverMerchant.class);
    return response.getBody();

CloverMerchant 模型类：

private String id;
private String name;
private String website;
private boolean isBillable;
private CloverBusinessEquipments equipment;

// other relevant getters and setters

CloverBusinessEquipments 模型类：

private List<CloverBusinessEquipment> elements;

// relevant getters and setters

CloverBusinessEquipment 模型类：

private String merchantId;
private String serialNumber;
private String equipmentCode;
private String equipmentCodeDesc;
private String provisionedDeviceType;
private boolean boarded;
private boolean provisioned;

// relevant getters and setters

来自 REST API 的响应 JSON：

{
  "id": "5ZTFCGXQKVZNA",
  "name": "xxxx",
  "website": "https://xxxx.io",
  "isBillable": false,
  "equipment": {
    "elements": [
        {
            "merchantId": "5ZTFCGXQKVZNA",
            "boarded": false,
            "provisioned": true,
            "serialNumber": "C030UQ71040182",
            "equipmentCode": "105J",
            "equipmentCodeDesc": "Clover Mini",
            "provisionedDeviceType": "MAPLECUTTER"
        },
        {
            "merchantId": "5ZTFCGXQKVZNA",
            "boarded": false,
            "provisioned": true,
            "serialNumber": "C050UQ75150054",
            "equipmentCode": "1297",
            "equipmentCodeDesc": "Clover Station 2018",
            "provisionedDeviceType": "GOLDENOAK"
        }
     ]
   }
}
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