Jackson-如何处理作为JSON (Netsed Json)传递的请求数据？

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.5</version>
</dependency>

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

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
}

String json = "{\"name\":\"John\",\"age\":30,\"address\":{\"street\":\"123 Main St\",\"city\":\"New York\"}}";
ObjectMapper objectMapper = new ObjectMapper();
Person person = objectMapper.readValue(json, Person.class);

String name = person.getName(); // "John"
int age = person.getAge(); // 30
String street = person.getAddress().getStreet(); // "123 Main St"
String city = person.getAddress().getCity(); // "New York"

Person person = new Person();
person.setName("John");
person.setAge(30);
Address address = new Address();
address.setStreet("123 Main St");
address.setCity("New York");
person.setAddress(address);

ObjectMapper objectMapper = new ObjectMapper();
String json = objectMapper.writeValueAsString(person);