如何从Future<String>形式的json对象中获取这些值？

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

public class JsonParsingExample {
    public static void main(String[] args) {
        // 假设futureJson是一个Future<String>类型的json对象
        CompletableFuture<String> futureJson = CompletableFuture.completedFuture("{\"name\":\"John\",\"age\":30}");

        try {
            // 等待Future对象完成并获取结果
            String jsonString = futureJson.get();

            // 创建ObjectMapper对象
            ObjectMapper objectMapper = new ObjectMapper();

            // 解析json字符串为JsonNode对象
            JsonNode jsonNode = objectMapper.readTree(jsonString);

            // 获取name和age的值
            String name = jsonNode.get("name").asText();
            int age = jsonNode.get("age").asInt();

            // 打印结果
            System.out.println("Name: " + name);
            System.out.println("Age: " + age);
        } catch (InterruptedException | ExecutionException e) {
            e.printStackTrace();
        }
    }
}