Gson如何解析自定义字段

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;

public class CustomFieldParser {
    public static void main(String[] args) {
        String json = "{\"name\": \"John\", \"age\": 25, \"customField\": {\"field1\": \"value1\", \"field2\": \"value2\"}}";

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

        Person person = gson.fromJson(json, Person.class);
        System.out.println(person.getName()); // Output: John
        System.out.println(person.getCustomField().getField1()); // Output: value1
        System.out.println(person.getCustomField().getField2()); // Output: value2
    }

    static class Person {
        private String name;
        private int age;
        private CustomField customField;

        // Getters and setters

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public int getAge() {
            return age;
        }

        public void setAge(int age) {
            this.age = age;
        }

        public CustomField getCustomField() {
            return customField;
        }

        public void setCustomField(CustomField customField) {
            this.customField = customField;
        }
    }

    static class CustomField {
        private String field1;
        private String field2;

        // Getters and setters

        public String getField1() {
            return field1;
        }

        public void setField1(String field1) {
            this.field1 = field1;
        }

        public String getField2() {
            return field2;
        }

        public void setField2(String field2) {
            this.field2 = field2;
        }
    }

    static class PersonDeserializer implements JsonDeserializer<Person> {
        @Override
        public Person deserialize(JsonElement json, java.lang.reflect.Type typeOfT, JsonDeserializationContext context) {
            JsonObject jsonObject = json.getAsJsonObject();
            Person person = new Person();
            person.setName(jsonObject.get("name").getAsString());
            person.setAge(jsonObject.get("age").getAsInt());

            JsonObject customFieldObject = jsonObject.getAsJsonObject("customField");
            CustomField customField = new CustomField();
            customField.setField1(customFieldObject.get("field1").getAsString());
            customField.setField2(customFieldObject.get("field2").getAsString());

            person.setCustomField(customField);

            return person;
        }
    }
}