如何将JSON中嵌入的JSON字符串转换为java对象？

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) {
        String json = "{\"name\":\"John\",\"address\":{\"city\":\"New York\",\"country\":\"USA\"}}";

        try {
            ObjectMapper objectMapper = new ObjectMapper();
            Person person = objectMapper.readValue(json, Person.class);
            System.out.println(person.getName());
            System.out.println(person.getAddress().getCity());
            System.out.println(person.getAddress().getCountry());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

class Person {
    private String name;
    private Address address;

    // getters and setters

    static class Address {
        private String city;
        private String country;

        // getters and setters
    }
}

John
New York
USA