java - 确保休息 : Deserialization and Inheritance to cater to varied Responses being returned by an API endpoint

Question

我遇到的情况是，有时 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"
}

如何以通用方式反序列化它以满足不同的响应？

Answer 1

您可以创建两个不同的对象来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，假设成功的响应有 http 状态代码 200，否则它是一个错误，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);
   }