CODEWITHSUNDEEP
jsonspringrestspring-bootclient
Bartłomiej Matyjaszczyk
Bartłomiej Matyjaszczyk

Reputation: 79

Map Json to object from json array

I've just started new project.

My backend client is fetching json from external API, wrap it to right model and then frontend can fetch this transformed data.

My problem is that I am receivig this format of json:

 {
"page": 1,
"total_results": 52,
"total_pages": 3,
"results": [
    {
     {Movie1 data}
     {Movie2 data}
     {Movie3 data}
     ...
     }
  ]
 }

I would like to fetch only Movies data, so I created Movie model, but it cannot deserialize it.

Here is my code:

    RestTemplate restTemplate = new RestTemplate();
    HttpHeaders headers = new HttpHeaders();
    headers.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));
    String resourceURL = url;
    HttpEntity<String> entity = new HttpEntity<String>(headers);
    ResponseEntity<Movie[]> response = restTemplate.exchange(resourceURL,  HttpMethod.GET, entity, Movie[].class);
    if (response.getStatusCode() == HttpStatus.OK) {
        for (Movie movie : response.getBody()) {
            System.out.println(movie.originalTitle);
        }
    }
    else
    {
        System.out.println("Error");
    }

How I could fetch data from results array? Greetnigs Bartek

Upvotes: 0

Views: 89

Answers (1)

pvpkiran
pvpkiran

Reputation: 27048

You need to create a pojo matching your json. Currently, you are trying to match your json to Movie[], which is not correct.
Try this

@JsonIgnoreProperties(ignoreUnknown = true)
class MovieResult {
    List<Movie> results;
    //Getters and Setters
}

@JsonIgnoreProperties(ignoreUnknown = true)
class Movie {
//Getters and Setters   
}



 ResponseEntity<MovieResult> response = restTemplate.exchange(resourceURL,  HttpMethod.GET, entity, MovieResult.class);
 MovieResult movieResult = response.getBody();
 List<Movie> movies = movieresult.getResults();

Upvotes: 1

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