REST保证：反序列化和继承，以适应API端点返回的各种响应

Question

我有时遇到API的响应是

{
    "SuccessCode": "OPERATION_SUCCESS",
    "Message": "Operation completed successfully"
}

有时，响应是

{
    "FaultId": "User already exists",
    "fault": "FAULT_USER_ALREADY_EXISTS"
}

我如何以通用的方式反序列化以适应各种不同的响应？

Answer 1

您可以创建两个不同的对象，分别表示错误和成功的响应：

public class Successful {
   private String SuccessCode; // or successCode as usually done in java + annotation to map the json field
   private String Message;

   ... getters, setters ...
}

public class Faulty {
   private String FaultId;
   private String fault;
   ... getters, setters ...
}

然后，假设成功的响应具有http状态代码200，否则是错误的，您可以：
   Response resp  =  when().get(<SOME_URL_GOES_HERE);
   if(resp.getStatusCode () == 200) {
       Successful respSuccess = resp.body().as(Successful.class);
   } else {
       Faulty faulty = resp.body().as(Faulty.class);
   }