How to return response of JSONArray in Jackson framework rest api's?

Question

@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getData(@QueryParam("id") long id) throws Exception {
    JSONArray json = (getting some json data from db)
    ObjectMapper obj = new ObjectMapper();
    return Response.ok(obj.writeValueAsString(json)).build();
}

I am trying to return the json array like this but getting error like this.

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.json.JSONArray and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) 

Can anyone help me with serialize this and provide the response. Thanks in Advance.

Answer 1

If you are using spring then you don't need JSONArray , just create a simple POJO class with all the getter and setter and use ObjectMapper to parse the JSON into that object, and then write the POJO class to response, as given below:

public ResponseEntity<DummyObject> getData(@QueryParam("id") long id) throws Exception 
    DummyPojo obj = mapper.readValue(json, DummyPojo.classs);
    return ResponseEntity.ok(obj)
}

// Replace DummyObject with your class

Spring will automatically converts into json, please check this link for more info