泽西岛HTTP响应返回json值

Question

public class Dto {
    private boolean flag;
    private String code;
    private String message;
    private Object data;
    ......
}

It is a generic return format.

@GET
@Path("/test2")
public Response appLogin2() {
    Dto dto = new Dto();
    Device device = new Device();
    device.setAreaName("NewYork");
    dto.setData(device);
    dto.setFlag(true);
    Response res = Response.status(Status.OK).entity(dto).build();
    return res;
}

But now its return value is

{
    "data": "com.gmi.its.itsmain.model.Device@7067fd1f",
    "flag": true
}

How can I get that return value

{
    "data": {
            "areaName": "NewYork"
        },
    "flag": true
}

I user springboot can get that return value.

Answer 1

You should specify a class for that data property. Currently, it is being read as an Object, which means that the serializer doesn't know what to expect about it. The only thing that the serializer can do is calling the Object's toString() method, which outputs className@hashCode .

Try something like this:

public class Dto {
  private boolean flag;
  private String code;
  private String message;
  private Device data;
  ......
}

If you are not sure about the class that you will use for the data field, you should create an interface that all these possible classes extend from.

Answer 2

String jsonString = JSON.toJSONString(dto); return Response.status(Status.OK).entity(jsonString).build();

I did it this way now