How not to display null values in json as response from jax-rs

Question

I'm using jax rs and I want to create responses as json, code:

@Produces(MediaType.APPLICATION_JSON)
public class Rest{
@GET
Path("/Test")
public RestResponse restTest(){
return new RestResponse(100,"ERROR");
}
}

@XmlRootElement()
public class RestResponse{
private Integer code;
private String status;
private Integer id;

public RestResponse(Integer code, String status){
this.code = code;
this.status = status;
}
}

and I'm getting response as :
{"status":"ERROR","code":100,"id":null}

how to remove that "id":null value? I want response to looks as : {"status":"ERROR","code":100}

I need it because sometimes id is null and sometimes code is null and I don't want to display it.

eugen · Accepted Answer · 2013-09-24 10:42:01Z

2

With Genson you could do it like that:

// register a provider for your custom genson configuration.
@Provider
public class GensonCustomResolver implements ContextResolver<Genson> {
  // configure the Genson instance
  private final Genson genson = new Genson.Builder()
                                        // if you want to support JAXB annotations
                                        .with(new JAXBBundle())
                                        .setSkipNull(true)
                                        .create();

  @Override
  public Genson getContext(Class<?> type) {
    return genson;
  }
}

answered Sep 24, 2013 at 10:42

eugen

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1 Comment

user2377971 Over a year ago

omg that is so simply and powerfull, it makes me life easier thanks again

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