解析多维json数据[重复]答案

【问题标题】：parsing multidimensional json data [duplicate]解析多维json数据[重复]
【发布时间】：2020-01-29 06:55:06
【问题描述】：

我是 android 开发的新手，我正在学习解析 json 数据，但我一直在解析多维 json 数据。这是我要解析的json数据。

{
   "responseCode": 200,
   "message": "Category List",
   "category_data": [
       {
           "id": "24",
           "slug": "product",
           "category_code": "PC",
           "category_image": "Category_1576578421lh5d.png",
           "status": "1",
           "created_at": "2020-01-10 01:23:22",
           "category_name": "ACCESORIES",
           "subcategory": [
               {
                   "id": "8",
                   "category_id": "24",
                   "slug": "belt",
                   "subcategory_code": "BELT",
                   "status": "1",
                   "created_at": "2019-12-17 08:47:27",
                   "subcategory_name": "BELT"
               },
               {
                   "id": "9",
                   "category_id": "24",
                   "slug": "bags",
                   "subcategory_code": "BAGS",
                   "status": "1",
                   "created_at": "2019-12-17 08:47:15",
                   "subcategory_name": "BAGS"
               },
               {
                   "id": "10",
                   "category_id": "24",
                   "slug": "hat",
                   "subcategory_code": "HAT",
                   "status": "1",
                   "created_at": "2019-12-17 08:46:28",
                   "subcategory_name": "HAT"
               },
               {
                   "id": "16",
                   "category_id": "24",
                   "slug": "underwear",
                   "subcategory_code": "UW",
                   "status": "1",
                   "created_at": "2019-12-17 08:47:47",
                   "subcategory_name": "UNDERWEAR"
               },
               {
                   "id": "17",
                   "category_id": "24",
                   "slug": "undershirt",
                   "subcategory_code": "US",
                   "status": "1",
                   "created_at": "2019-12-17 08:47:58",
                   "subcategory_name": "UNDERSHIRT"
               },
               {
                   "id": "18",
                   "category_id": "24",
                   "slug": "boxer",
                   "subcategory_code": "BX",
                   "status": "1",
                   "created_at": "2019-12-17 08:48:31",
                   "subcategory_name": "BOXER"
               },
               {
                   "id": "19",
                   "category_id": "24",
                   "slug": "shocks",
                   "subcategory_code": "SC",
                   "status": "1",
                   "created_at": "2019-12-17 08:48:40",
                   "subcategory_name": "SHOCKS"
               },
               {
                   "id": "20",
                   "category_id": "24",
                   "slug": "slipper",
                   "subcategory_code": "SLP",
                   "status": "1",
                   "created_at": "2019-12-17 08:49:08",
                   "subcategory_name": "SLIPPER"
               },
               {
                   "id": "21",
                   "category_id": "24",
                   "slug": "slip-on",
                   "subcategory_code": "SO",
                   "status": "1",
                   "created_at": "2019-12-17 08:48:48",
                   "subcategory_name": "SLIP ON"
               },
               {
                   "id": "22",
                   "category_id": "24",
                   "slug": "shoes",
                   "subcategory_code": "SH",
                   "status": "1",
                   "created_at": "2019-12-17 01:13:05",
                   "subcategory_name": "SHOES"
               },
               {
                   "id": "31",
                   "category_id": "24",
                   "slug": "updates",
                   "subcategory_code": "FU",
                   "status": "1",
                   "created_at": "2020-01-10 01:42:08",
                   "subcategory_name": "TERBARU"
               }
           ]
       },

请帮我解析一下。

【问题讨论】：

到目前为止你尝试了什么？
您可以使用插件来自动解析 JSON。 plugins.jetbrains.com/plugin/7654-gsonformat
这能回答你的问题吗？ How to parse JSON in Java
为此，您必须使用改造和图像加载滑行
非常感谢大家的帮助。

标签： android json android-studio jsonparser

【解决方案1】：

您可以使用gson 解析器轻松解析此 JSON。

步骤： 1. 为 sub_category 数据创建 POJO 类，如下所示：-

 class SubCategory {

    @SerializedName("id") 
    String id;

    @SerializedName("category_id") 
    String categoryId;

    @SerializedName("subcategory_code") 
    String subcategoryCode;

//.... Declare all var here as like above ...//

    }

像这样为 category_data 创建另一个 POJO：-

类类别{

    @SerializedName("id") 
    String id;

    @SerializedName("category_code") 
    String categoryCode;

    @SerializedName("subcategory") 
    ArrayList<SubCategory> subcategories;

//.... 像上面一样在此处声明所有其他 var ...//

}

父响应的最后一个 POJO（如果需要）如下所示：-

类 ApiResponse {

@SerializedName("responseCode") 
int responseCode;

@SerializedName("category_data") 
ArrayList<Category> categories;

}

这里有更多gson解析教程：-https://www.javacodegeeks.com/2011/01/android-json-parsing-gson-tutorial.html

【讨论】：

【解决方案2】：

您的 JSON 数据有误，请检查 JSON viewer 中的 json 数据

{
   "responseCode": 200,
   "message": "Category List",
   "category_data": [

         {"id": "24",
   "slug": "product",
   "category_code": "PC",
   "category_image": "Category_1576578421lh5d.png",
   "status": "1",
   "created_at": "2020-01-10 01:23:22",
   "category_name": "ACCESORIES",
   "subcategory": [
     {
       "id": "8",
       "category_id": "24",
       "slug": "belt",
       "subcategory_code": "BELT",
       "status": "1",
       "created_at": "2019-12-17 08:47:27",
       "subcategory_name": "BELT"
     },
     {
       "id": "9",
       "category_id": "24",
       "slug": "bags",
       "subcategory_code": "BAGS",
       "status": "1",
       "created_at": "2019-12-17 08:47:15",
       "subcategory_name": "BAGS"
     },
     {
       "id": "10",
       "category_id": "24",
       "slug": "hat",
       "subcategory_code": "HAT",
       "status": "1",
       "created_at": "2019-12-17 08:46:28",
       "subcategory_name": "HAT"
     },
     {
       "id": "16",
       "category_id": "24",
       "slug": "underwear",
       "subcategory_code": "UW",
       "status": "1",
       "created_at": "2019-12-17 08:47:47",
       "subcategory_name": "UNDERWEAR"
     },
     {
       "id": "17",
       "category_id": "24",
       "slug": "undershirt",
       "subcategory_code": "US",
       "status": "1",
       "created_at": "2019-12-17 08:47:58",
       "subcategory_name": "UNDERSHIRT"
     },
     {
       "id": "18",
       "category_id": "24",
       "slug": "boxer",
       "subcategory_code": "BX",
       "status": "1",
       "created_at": "2019-12-17 08:48:31",
       "subcategory_name": "BOXER"
     },
     {
       "id": "19",
       "category_id": "24",
       "slug": "shocks",
       "subcategory_code": "SC",
       "status": "1",
       "created_at": "2019-12-17 08:48:40",
       "subcategory_name": "SHOCKS"
     },
     {
       "id": "20",
       "category_id": "24",
       "slug": "slipper",
       "subcategory_code": "SLP",
       "status": "1",
       "created_at": "2019-12-17 08:49:08",
       "subcategory_name": "SLIPPER"
     },
     {
       "id": "21",
       "category_id": "24",
       "slug": "slip-on",
       "subcategory_code": "SO",
       "status": "1",
       "created_at": "2019-12-17 08:48:48",
       "subcategory_name": "SLIP ON"
     },
     {
       "id": "22",
       "category_id": "24",
       "slug": "shoes",
       "subcategory_code": "SH",
       "status": "1",
       "created_at": "2019-12-17 01:13:05",
       "subcategory_name": "SHOES"
     },
     {
       "id": "31",
       "category_id": "24",
       "slug": "updates",
       "subcategory_code": "FU",
       "status": "1",
       "created_at": "2020-01-10 01:42:08",
       "subcategory_name": "TERBARU"
     }]}]}

使用Retrofit 库可以轻松解析数据。使用源类型 JSON 创建 POJO class

【讨论】：

【解决方案3】：

第 1 步：由于您是 Android 新手，您必须先了解一些基础知识，例如 JSON 对象和 JSON 数组-

@Override
public void onResponse(final JSONObject response) 
{
JSONObject obj = response;
        try {
            obj.getString("responseCode");
            obj.getString("message");

            //category array
            JSONArray array = new JSONArray();
            array = obj.getJSONArray("category_data");
            for(int i=0; i<array.length(); i++){
                //category data single object
                JSONObject object = array.getJSONObject(i);
                String id = object.getString("id");
                String slug = object.getString("slug");
                String category_code = object.getString("category_code");
                String category_image = object.getString("category_image");

                //sub category array
                JSONArray subCatArray = new JSONArray();
                subCatArray = obj.getJSON`enter code here`Array("subcategory");
                for(int j=0; i<subCatArray.length(); i++){
                    //sub category data single object
                    JSONObject subObject = array.getJSONObject(i);
                    String id2 = subObject.getString("id");
                    String slug2 = subObject.getString("slug");
                    String subcategory_code = subObject.getString("subcategory_code");
                    String subcategory_name = subObject.getString("subcategory_name");
                }
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
}

第 2 步：可以使用 Array 列表或 Model 类来存储解析后的数据使用 GSon 和 Retrofit 库

【讨论】：