springfox(swagger2) does not work with GsonHttpMessageConverterConfig

Question

What I am trying to build is a spring-boot (v1.2.3) application and expose my Rest API with SpringFox(swagger2) v2.0.0

my Swagger Spring config

Answer 1

Ran into a similar problem but found a little different solution which is also using the above mentioned serializer.

We define a Bean to be able to autowire Gson objects. For fixing the issue with Swagger the important part there is to also add "registerTypeAdapter" for the Json class.

@Configuration
public class GsonConfiguration {
   @Bean
   public Gson gson() {
      return new GsonBuilder().registerTypeAdapter(Json.class, new SpringfoxJsonToGsonAdapter()).create();
   }
}

The content of SpringfoxJsonToGsonAdapter is the same as above and only listed here for completeness.

public class SpringfoxJsonToGsonAdapter implements JsonSerializer {
    @Override
    public JsonElement serialize(Json json, Type type, JsonSerializationContext context) {
        final JsonParser parser = new JsonParser();
        return parser.parse(json.value());
    }
}

For using the Gson object just do something like this:

@Component
public class Foobar {
   @Autowired
   Gson gson;

   @Autowired
   public Foobar() {
      // ... some constructor work ...
   }

   public void someMethod() {
      System.out.println(gson.toJson(...)); // Fill in some object ;-)
   }
}