Deserializing nested JSON array using jackson-CodePudding

In my app, I'm working with objects like this:

public class User {
  private String name;
  private int age;
}

I make a call to an API, and the response looks like:

{
  response: {
   result: [
     {
        name: x
        age: y
     },
     {
        name: x
        age: y
     },
    ...

  }
}

Somehow, I'd like to call User[] users = restTemplate.getForObject(url, ...) and get my list of users. However, I'm unsure of how to parse the json response and create a list of Users using Jackson. Anyone have suggestions?

CodePudding user response：

Jackson can deal with generic collections with POJO values:

try {
    Map<String, Map<String, List<User>>> result = mapper.readValue(response, new TypeReference<Map<String, Map<String, List<User>>>>() {});
    
    List<User> users = result.get("response").get("result");
    for (User user : users) {
        System.out.println(user.getName());
    }
} catch (Exception e) {
    e.printStackTrace();
}

CodePudding user response：

public class User {
  private String name;
  private int age;
}

class Response{
    private User[] result;
 // omitted getter and setter
}

class OuterResponse{
    private Response response;
 // omitted getter and setter
}

OuterResponse outerResponse = restTemplate.getForObject(url, ...);
User[] users=outerResponse.getResponse().getResult();