如何在POJO中将JSON key从camelCase改为蛇形大小写？

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

public class JsonKeyConversionExample {

    public static void main(String[] args) throws Exception {
        String json = "{\"firstName\":\"John\", \"lastName\":\"Doe\"}";

        ObjectMapper mapper = new ObjectMapper();
        mapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);

        Person person = mapper.readValue(json, Person.class);
        System.out.println(person.getFirstName()); // 输出: John
        System.out.println(person.getLastName());  // 输出: Doe
    }
}

class Person {
    private String first_name;
    private String last_name;

    public String getFirstName() {
        return first_name;
    }

    public void setFirstName(String first_name) {
        this.first_name = first_name;
    }

    public String getLastName() {
        return last_name;
    }

    public void setLastName(String last_name) {
        this.last_name = last_name;
    }
}

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;

import java.io.IOException;

public class JsonKeyConversionExample {

    public static void main(String[] args) {
        String json = "{\"firstName\":\"John\", \"lastName\":\"Doe\"}";

        Gson gson = new GsonBuilder()
                .registerTypeAdapter(Person.class, new PersonTypeAdapter())
                .create();

        Person person = gson.fromJson(json, Person.class);
        System.out.println(person.getFirstName()); // 输出: John
        System.out.println(person.getLastName());  // 输出: Doe
    }
}

class Person {
    private String first_name;
    private String last_name;

    public String getFirstName() {
        return first_name;
    }

    public void setFirstName(String first_name) {
        this.first_name = first_name;
    }

    public String getLastName() {
        return last_name;
    }

    public void setLastName(String last_name) {
        this.last_name = last_name;
    }
}

class PersonTypeAdapter extends TypeAdapter<Person> {

    @Override
    public void write(JsonWriter out, Person value) throws IOException {
        // 这里可以实现将Person对象转换为JSON的逻辑，如果需要的话
    }

    @Override
    public Person read(JsonReader in) throws IOException {
        Person person = new Person();
        in.beginObject();
        while (in.hasNext()) {
            String name = in.nextName();
            switch (name) {
                case "first_name":
                    person.setFirstName(in.nextString());
                    break;
                case "last_name":
                    person.setLastName(in.nextString());
                    break;
                default:
                    in.skipValue();
                    break;
            }
        }
        in.endObject();
        return person;
    }
}