如何创建包含多个数组的 JSON 文件并向 dishes 添加列表

你原来编写的是类Dart风格的对象/Map代码，并非标准JSON。JSON是纯文本数据格式，不支持类定义、变量赋值等代码逻辑，核心语法规则如下：

• 所有对象键名、字符串值必须使用双引号包裹，不能用单引号
• 对象、数组的最后一个成员末尾禁止加多余逗号
• 字符串必须成对闭合，原代码中Mutton Kadhai缺少末尾引号，需补全
• 原代码中的&是HTML转义字符，JSON内直接写&即可
• 数字、布尔类型值不需要加引号，原有数值写法可以保留
• 不同对象可按需拥有不同字段，示例中部分酒店缺少菜单数组、部分酒店有优惠字段，均符合JSON规范

将内容保存为hotel_list.json即可：

{
  "hotelData": [
    {
      "index": 0,
      "restaurantName": "Monginis Cake Shop",
      "foodCategory": "The Cake Shop",
      "restReview": 5,
      "restImage": "assets/images/Restaurant1.png",
      "distanceFromLocation": 40,
      "restStatus": "open",
      "menuCategories": [
        {
          "categoryName": "Pastry",
          "dishes": [
            "Dutch Pastry",
            "Truffle Pastry",
            "Pipeapple Veg Pastry",
            "Brownee Sqare Veg Pastry",
            "Choco Lava Veg Cup"
          ]
        },
        {
          "categoryName": "small cake ( half kg)",
          "dishes": [
            "Sapphire Veg Small",
            "Deviles Delite Veg Small",
            "Duth Chocolate Heart Veg (Small)",
            "Shimmer Choco Veg Small"
          ]
        },
        {
          "categoryName": "Breads",
          "dishes": [
            "Sandwich Bread",
            "Multigrain Bread",
            "Brown Bread"
          ]
        },
        {
          "categoryName": "Large cake",
          "dishes": [
            "Alpine Choco Veg(Large)"
          ]
        },
        {
          "categoryName": "Cookies",
          "dishes": [
            "Almond Cocos Cookies",
            "Shewsburry Cookies",
            "Honey Crunch Cookis",
            "Kesar Cookies",
            "Jeeraa Cookies"
          ]
        },
        {
          "categoryName": "Savouries",
          "dishes": [
            "Panner pattice",
            "Veg Burger",
            "Pan Pizza Veg",
            "Veg pattice"
          ]
        },
        {
          "categoryName": "Chocolate",
          "dishes": [
            "Just Temptations"
          ]
        },
        {
          "categoryName": "Plum & Bar cake",
          "dishes": [
            "Fruit Bar cake"
          ]
        }
      ]
    },
    {
      "index": 1,
      "restaurantName": "Swami Hotel",
      "foodCategory": "Family Hotel",
      "restReview": 2,
      "restImage": "assets/images/Restaurant2.png",
      "distanceFromLocation": 40,
      "restStatus": "open",
      "menuCategories": [
        {
          "categoryName": "Veg Starter",
          "dishes": [
            "Paneer pahadi kabab",
            "Garlic chana",
            "Masala papad",
            "Manchurian"
          ]
        },
        {
          "categoryName": "Tandoori",
          "dishes": [
            "Chicken Tandoori",
            "Chicken Tangadi Kabab",
            "Chicken Pahadi Kabab",
            "Mutton Kadhai"
          ]
        },
        {
          "categoryName": "INDIAN BREAD",
          "dishes": [
            "Aalu Paratha",
            "Paneer Paratha",
            "Nan",
            "Butter Nan",
            "Tandoori Roti",
            "Chapati"
          ]
        }
      ]
    },
    {
      "index": 2,
      "restaurantName": "Diva Sagar",
      "foodCategory": "Family restaurant",
      "restReview": 5,
      "restImage": "assets/images/Restaurant3.png",
      "distanceFromLocation": 30,
      "restStatus": "open"
    },
    {
      "index": 3,
      "restaurantName": "Smart open pick cake shop",
      "foodCategory": "Cake Shop",
      "restReview": 1,
      "restImage": "assets/images/Restaurant4.png",
      "distanceFromLocation": 10,
      "restStatus": "closed",
      "offer": "Get 5% discount"
    }
  ]
}

现有结构中dishes是存储菜品名称的字符串数组，添加新条目的操作规则：

1. 定位到目标酒店、目标分类对应的dishes数组
2. 在当前最后一个菜品末尾加逗号，换行写入双引号包裹的新菜品名即可，数组的最后一项末尾不能加逗号

示例：给第一个酒店的Pastry分类新增草莓酥点，修改后的片段如下：

{
  "categoryName": "Pastry",
  "dishes": [
    "Dutch Pastry",
    "Truffle Pastry",
    "Pipeapple Veg Pastry",
    "Brownee Sqare Veg Pastry",
    "Choco Lava Veg Cup",
    "Strawberry Pastry"
  ]
}

如果需要为菜品附加价格、辣度、是否素食等属性，可以把dishes的数组项从字符串改为对象，实现结构化嵌套，示例：

"dishes": [
  {
    "dishName": "Dutch Pastry",
    "price": 12,
    "isVeg": true
  },
  {
    "dishName": "Truffle Pastry",
    "price": 15,
    "isVeg": true
  }
]

内容的提问来源于stack exchange，提问作者Mrunal