如何在Flutter/Dart中优雅地使用原始JSON？

dependencies:
  json: ^2.0.0

import 'dart:convert';
import 'package:json/json.dart';

{
  "name": "John Doe",
  "age": 30,
  "email": "johndoe@example.com"
}

String jsonString = '{"name": "John Doe", "age": 30, "email": "johndoe@example.com"}';
Map<String, dynamic> jsonData = json.decode(jsonString);

String name = jsonData['name'];
int age = jsonData['age'];
String email = jsonData['email'];

class Person {
  String name;
  int age;
  String email;

  Person({this.name, this.age, this.email});

  factory Person.fromJson(Map<String, dynamic> json) {
    return Person(
      name: json['name'],
      age: json['age'],
      email: json['email'],
    );
  }
}

String jsonString = '{"name": "John Doe", "age": 30, "email": "johndoe@example.com"}';
Map<String, dynamic> jsonData = json.decode(jsonString);
Person person = Person.fromJson(jsonData);

String name = person.name;
int age = person.age;
String email = person.email;