看起来您的问题可能是您正在根据响应创建响应...您创建了响应，如果不是null，则尝试创建另一个回应与原始回应.因此，我想它正在尝试序列化原始响应，而不是您的对象.

It looks like your issue might be that you are creating a response out of a response...You create a response, then if not null, try to create another response with the original response. So, I imagine it is trying to serialize the original response, not your object.