Jackson -反序列化嵌套JSON字符串

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "Anytown"
  }
}

public class Person {
    private String name;
    private int age;
    private Address address;

    // Getters and setters
}

public class Address {
    private String street;
    private String city;

    // Getters and setters
}

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) {
        String jsonString = "{\"name\":\"John\",\"age\":30,\"address\":{\"street\":\"123 Main St\",\"city\":\"Anytown\"}}";

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