使用Jackson解析深度嵌套的JSON属性

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York",
    "country": "USA"
  },
  "friends": [
    {
      "name": "Jane",
      "age": 28
    },
    {
      "name": "Tom",
      "age": 32
    }
  ]
}

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

public class Person {
  private String name;
  private int age;
  private Address address;
  private List<Friend> friends;

  // getters and setters
}

String json = "{\"name\":\"John\",\"age\":30,\"address\":{\"street\":\"123 Main St\",\"city\":\"New York\",\"country\":\"USA\"},\"friends\":[{\"name\":\"Jane\",\"age\":28},{\"name\":\"Tom\",\"age\":32}]}";

ObjectMapper objectMapper = new ObjectMapper();
Person person = objectMapper.readValue(json, Person.class);

Address address = person.getAddress();
String street = address.getStreet();
String city = address.getCity();
String country = address.getCountry();

List<Friend> friends = person.getFriends();
for (Friend friend : friends) {
  String name = friend.getName();
  int age = friend.getAge();
  // 处理每个朋友的数据
}