Question

我需要在 flutter 中将对象转换为数组，请找到 json

{
  "billing": [
    {
      "id": 1,
      "add_id": 23
    }
  ],
  "shipping": [
    {
      "id": 2,
      "add_id": 345
    },
    {
      "id": 3,
      "add_id": 345
    }
  ]
}

我需要在 flutter 中转换成数组并映射到模型，怎么做

Answer 1

使用以下代码将您的 JSON 转换为类对象，fromJson 函数将 JSON 转换为对象，而 toJson 函数将对象转换为 json。

class YourClassName {
  List<Billing> billing;
  List<Shipping> shipping;

  YourClassName({this.billing, this.shipping});

  YourClassName.fromJson(Map<String, dynamic> json) {
    if (json['billing'] != null) {
      billing = new List<Billing>();
      json['billing'].forEach((v) {
        billing.add(new Billing.fromJson(v));
      });
    }
    if (json['shipping'] != null) {
      shipping = new List<Shipping>();
      json['shipping'].forEach((v) {
        shipping.add(new Shipping.fromJson(v));
      });
    }
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    if (this.billing != null) {
      data['billing'] = this.billing.map((v) => v.toJson()).toList();
    }
    if (this.shipping != null) {
      data['shipping'] = this.shipping.map((v) => v.toJson()).toList();
    }
    return data;
  }
}

class Billing {
  int id;
  int addId;

  Billing({this.id, this.addId});

  Billing.fromJson(Map<String, dynamic> json) {
    id = json['id'];
    addId = json['add_id'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['id'] = this.id;
    data['add_id'] = this.addId;
    return data;
  }
}

class Shipping {
  int id;
  int addId;

  Shipping({this.id, this.addId});

  Shipping.fromJson(Map<String, dynamic> json) {
    id = json['id'];
    addId = json['add_id'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['id'] = this.id;
    data['add_id'] = this.addId;
    return data;
  }
}

在颤振中将对象转换为数组

1 个答案: