RestFul cucumber acceptance test to get local file json as output - json

Question

I want to mock a resttemplate output. We have a service /someservice/getJson to get json. To mock this service we kept a json file in the code base and tried to get it to the response entity as follows.
working code:
String baseURL = "http://localhost:1010"
String uri = /someservice/getJson
ResponseEntity<T> entity = restTemplate.exchange(baseURL + uri, GET, new HttpEntity<>(headers), type);
I have a json file in the code base (say codebase/../resource/myfile.json)
I would like to get the response entity as the local json I mock.
I tried using exchange method. It doesnt seems as working for me.
What I tried with my json file
String localJson = "/resource/myfile.json";
ResponseEntity<T> entity = restTemplate.exchange(localJson, GET, new HttpEntity<>(headers), type);
I think there are another methods to get it done other than exchange. But I am not aware of those.
Is there any other way / is there any mistake in what I tried ?

Answer 1

To read a file with JSON object and convert it into a POJO you can use ObjectMapper’s
readValue(File src, Class<T> valueType) method (readValue doc link) from Jackson framework:
import java.io.File;
import com.fasterxml.jackson.databind.ObjectMapper;
ObjectMapper mapper = new ObjectMapper();
YourJsonType response = mapper.readValue( new File("file with JSON object") , YourJsonType.class);