How to parse JSON placed in resource folder in SpringBoot

Hi I am trying to parse a JSON that I have saved in a resource folder and test it. So I took these steps for now.

DataLoader.java

@Service
public class DataLoader {

private static ObjectMapper  objectMapper = defaultObjectMapper();

  private static ObjectMapper defaultObjectMapper(){
    ObjectMapper  defaultObjectMapper = new ObjectMapper();
    //defaultObjectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    return defaultObjectMapper;
  }

  public static JsonNode parse(String str) throws IOException {
    return objectMapper.readTree(str);
  }

  public static <A> A fromJason(JsonNode node, Class<A> clazz) throws JsonProcessingException {
    return objectMapper.treeToValue(node, clazz);
  }

}

DataLoaderTest.java

public class DataLoaderTest {

    @Value("classpath:data/novo.json")
    Resource jsonSource;

    //private String jsonSource = "{\"title\":\"new book\"}";

    @Test
    public void parse() throws IOException {
        JsonNode node = DataLoader.parse(jsonSource);
        assertEquals(node.get("title").asText(), "new book");
    }

    @Test
    public void fromJson() throws IOException {
        JsonNode node = DataLoader.parse(jsonSource);
        Fruit pojo = DataLoader.fromJason(node, Fruit.class);
        System.out.println("Pojo title " + pojo.title);
    }

}

So when I test it with //private String jsonSource = "{\"title\":\"new book\"}"; everything is working fine.

When I try to load JSON file from resources folder I am getting error:

error: incompatible types: Resource cannot be converted to String JsonNode node = ApxDataLoader.parse(jsonSource);

Any help highly appreciated.