如何从我们自动生成的 pojo class 中获取和显示 json 数组数据？

Question

我在整个互联网上进行了搜索，但无法从 pojo 解析我的 json 数组 class.Application 再次崩溃 again.Please 谁能告诉我如何解析并从复杂的 json response.This 中显示 json 数组是我的 JSON 响应。从这里我想解析我的部门名称、描述、产品名称和类别列表。

{ "departmentAndCategory": [
{
  "departmentName": "Apparels",
  "departmentDescription": "Apparels",
  "storeId": null,
  "categoryList": [],
  "id": 1
},
{
  "departmentName": "Footwear",
  "departmentDescription": "footwear for men,women and kids",
  "storeId": null,
  "categoryList": [
    {
      "departmentId": 10,
      "categoryName": "Footwear",
      "categoryDescription": "Footwear for men,women and kids",
      "parentCategoryId": null
    },
    {
      "departmentId": 10,
      "categoryName": "Vehicles",
      "categoryDescription": "Two and Four wheelers",
      "parentCategoryId": null
    }
  ],
  "id": 10
},
{
  "departmentName": "Appliances",
  "departmentDescription": "TV,Washing Machines,Refrigerators etc.",
  "storeId": null,
  "categoryList": [
    {
      "departmentId": 11,
      "categoryName": "Appliances",
      "categoryDescription": "Appliances for home like TV,Washing Machines,Refrigerators etc.",
      "parentCategoryId": null
    },
    {
      "departmentId": 11,
      "categoryName": "Vehicles",
      "categoryDescription": "Two and Four wheelers",
      "parentCategoryId": null
    }
  ],
  "id": 11
},
{
  "departmentName": "Electronics",
  "departmentDescription": "Mobile Phones,Routers etc.",
  "storeId": null,
  "categoryList": [
    {
      "departmentId": 12,
      "categoryName": "Electronics",
      "categoryDescription": "Electrnocs for personal use like Mobile Phones,Routers etc.",
      "parentCategoryId": null
    }
  ],
  "id": 12
},
{
  "departmentName": "Home & Furniture",
  "departmentDescription": "All your Home & Furniture needs",
  "storeId": null,
  "categoryList": [],
  "id": 2
},
{
  "departmentName": "test",
  "departmentDescription": "test",
  "storeId": null,
  "categoryList": [],
  "id": 14
},
{
  "departmentName": "apparels",
  "departmentDescription": "apparels",
  "storeId": null,
  "categoryList": [],
  "id": 15
},
{
  "departmentName": "Levi`s Tshirt",
  "departmentDescription": "Levi`s Tshirt",
  "storeId": null,
  "categoryList": [],
  "id": 16
}],"productsAndDeals": [ {
  "imageName": null,
  "smallImage": null,
  "productName": "Levis T-shirt",
  "productDescription": "A good fabric from levis",
  "productPrice": 2000,
  "productInStock": 7,
  "productAvailability": "Product is available",
  "title": "Clothes",
  "dealList": [],
  "id": 1
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "skin-fit",
  "productDescription": "best blue jeans",
  "productPrice": 1000,
  "productInStock": 15,
  "productAvailability": "Product is available",
  "title": "Jeans",
  "dealList": [
    {
      "dealImage": "dev.beacon.interrait.com/resources/deal-1.jpg",
      "productsId": 2,
      "categoryId": 1,
      "expiryDate": null,
      "discountPercentage": 60,
      "discountAmount": 600,
      "isActive": "False",
      "dealNotes": null,
      "dealName": "Massive discount on skin fit jeans",
      "id": 1
    }
  ],
  "id": 2
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "bell-bottoms",
  "productDescription": "best blue jeans",
  "productPrice": 1200,
  "productInStock": 15,
  "productAvailability": "Product is available",
  "title": "Jeans",
  "dealList": [
    {
      "dealImage": "dev.beacon.interrait.com/resources/deal-1.jpg",
      "productsId": 3,
      "categoryId": 1,
      "expiryDate": null,
      "discountPercentage": 40,
      "discountAmount": 480,
      "isActive": "False",
      "dealNotes": null,
      "dealName": "Massive discount on bell bottoms",
      "id": 2
    }
  ],
  "id": 3
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "curve-jeans",
  "productDescription": "best blue jeans",
  "productPrice": 1200,
  "productInStock": 15,
  "productAvailability": "Product is available",
  "title": "Jeans",
  "dealList": [
    {
      "dealImage": "dev.beacon.interrait.com/resources/deal-1.jpg",
      "productsId": 4,
      "categoryId": 1,
      "expiryDate": null,
      "discountPercentage": 50,
      "discountAmount": 600,
      "isActive": "False",
      "dealNotes": null,
      "dealName": "Massive discount on curve jeans",
      "id": 3
    }
  ],
  "id": 4
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "Aman",
  "productDescription": "",
  "productPrice": 1000,
  "productInStock": 12,
  "productAvailability": "Product is available",
  "title": "Tshirt",
  "dealList": [],
  "id": 6
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "T-shirts for Men",
  "productDescription": "New T-shirt collection",
  "productPrice": 599,
  "productInStock": 0,
  "productAvailability": "Product not in stock",
  "title": "T-shirts",
  "dealList": [],
  "id": 7
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "abvgc",
  "productDescription": "askkkdd",
  "productPrice": null,
  "productInStock": 1,
  "productAvailability": "Product is available",
  "title": "dddrr",
  "dealList": [],
  "id": 19
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "top",
  "productDescription": "askkkdd",
  "productPrice": null,
  "productInStock": 1,
  "productAvailability": "Product is available",
  "title": "dddrr",
  "dealList": [],
  "id": 20
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "topsss",
  "productDescription": "askkkdfffd",
  "productPrice": null,
  "productInStock": 1,
  "productAvailability": "Product is available",
  "title": "dddrr",
  "dealList": [],
  "id": 21
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "topsss",
  "productDescription": "askkkdfffd",
  "productPrice": null,
  "productInStock": 1,
  "productAvailability": "Product is available",
  "title": "dddrr",
  "dealList": [],
  "id": 22
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "sample",
  "productDescription": "sample",
  "productPrice": null,
  "productInStock": 10,
  "productAvailability": "Product is available",
  "title": "Product",
  "dealList": [],
  "id": 23
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "sample",
  "productDescription": "sample",
  "productPrice": null,
  "productInStock": 10,
  "productAvailability": "Product is available",
  "title": "Product",
  "dealList": [],
  "id": 24
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "sample",
  "productDescription": "sample",
  "productPrice": null,
  "productInStock": 10,
  "productAvailability": "Product is available",
  "title": "Product",
  "dealList": [],
  "id": 25
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "mobile",
  "productDescription": "smartphones",
  "productPrice": null,
  "productInStock": 1,
  "productAvailability": "Product is available",
  "title": "dddrr",
  "dealList": [],
  "id": 30
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "Apples",
  "productDescription": "fresh apples from farm",
  "productPrice": 150,
  "productInStock": 90,
  "productAvailability": "Product is available",
  "title": "Red apples",
  "dealList": [],
  "id": 31
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "slippers and jackets",
  "productDescription": "Slip Ons",
  "productPrice": 210,
  "productInStock": 45,
  "productAvailability": "Product is available",
  "title": "Liberty slippes",
  "dealList": [],
  "id": 110
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "glucose",
  "productDescription": "glucone D",
  "productPrice": 60,
  "productInStock": 123,
  "productAvailability": "Product is available",
  "title": "Glucose for health",
  "dealList": [],
  "id": 117
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "jackets",
  "productDescription": "rugged jackets",
  "productPrice": 210,
  "productInStock": 45,
  "productAvailability": "Product is available",
  "title": "Liberty slippes",
  "dealList": [],
  "id": 121
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "Stationary",
  "productDescription": "pens,pencil",
  "productPrice": 10,
  "productInStock": 100,
  "productAvailability": "Product is available",
  "title": "--",
  "dealList": [],
  "id": 127
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "bat",
  "productDescription": "cricket bats",
  "productPrice": 500,
  "productInStock": 20,
  "productAvailability": "Product is available",
  "title": "games for kids",
  "dealList": [],
  "id": 128
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "ball",
  "productDescription": "cricket bats",
  "productPrice": 500,
  "productInStock": 20,
  "productAvailability": "Product is available",
  "title": "games for kids",
  "dealList": [],
  "id": 130
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "sports",
  "productDescription": "cricket bats",
  "productPrice": 500,
  "productInStock": 20,
  "productAvailability": "Product is available",
  "title": "games for kids",
  "dealList": [],
  "id": 131
},
{
  "imageName": null,
  "smallImage": null,
  "productName": "garden",
  "productDescription": "axe",
  "productPrice": 500,
  "productInStock": 20,
  "productAvailability": "Product is available",
  "title": "-",
  "dealList": [],
  "id": 132
}

] }

Answer 1

在这里您可以使用以下 classes 来解析您的响应：创建两个 classes： 1.部门和类别 2. 产品和交易

//部门和类别class

public class 部门和类别 {

private List<CategoryList> categoryList;

private String departmentDescription;

private String departmentName;

public DepartmentAndCategory(String departmentName,String departmentDescription,
                             List<CategoryList> categoryList){
    this.departmentName = departmentName;
    this.departmentDescription = departmentDescription;
    this.categoryList = categoryList;
}

public List<CategoryList> getCategoryList() {
    return categoryList;
}

public void setCategoryList(List<CategoryList> categoryList) {
    this.categoryList = categoryList;
}

public String getDepartmentDescription ()
{
    return departmentDescription;
}

public void setDepartmentDescription (String departmentDescription)
{
    this.departmentDescription = departmentDescription;
}

public String getDepartmentName ()
{
    return departmentName;
}

public void setDepartmentName (String departmentName)
{
    this.departmentName = departmentName;
}

@Override
public String toString()
{
    return "ClassPojo [ categoryList = "+categoryList+", departmentDescription = "+departmentDescription+", departmentName = "+departmentName+"]";
}

}

//ProductsAndDeals class

public class ProductsAndDeals { 私有字符串产品名称；

public ProductsAndDeals(){}

public ProductsAndDeals(String productName){
    this.productName = productName;
}

public String getProductName() {
    return productName;
}

public void setProductName(String productName) {
    this.productName = productName;
}

@Override
public String toString()
{

    return "ClassPojo [productName = "+productName+"]";
}

}

// 然后主要class解析响应

public class MainActivity extends AppCompatActivity {


    List<DepartmentAndCategory> departmentAndCategoryList = new ArrayList<>();
    List<ProductsAndDeals> productsAndDealsList = new ArrayList<>();

    private static final String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        int i=0;
        //Pass your response String here
        ParseResponse(Response.RESPONSE);
        String[] departNameArray = new String[departmentAndCategoryList.size()];

        //printing Department Name, Department Description and Category List
        for (DepartmentAndCategory list : departmentAndCategoryList){
            Log.e(TAG,"Departname : "+list.getDepartmentName());
            Log.e(TAG,"DepartDesc :"+list.getDepartmentDescription());
            departNameArray[i] = list.getDepartmentName();
            i++;
            for (CategoryList list1 : list.getCategoryList()){
                Log.e(TAG,"departmentId "+list1.getDepartmentId());
                Log.e(TAG,"categoryName "+list1.getCategoryName());
                Log.e(TAG,"categoryDescription "+list1.getCategoryDescription());
                Log.e(TAG,"parentCategoryId "+list1.getParentCategoryId());
            }
        }

        //departName array
        for (int j=0;j<departNameArray.length;j++){
            Log.e(TAG,"DepartName : "+departNameArray[j]);
        }

        //printing Product Name
        for (ProductsAndDeals dealsList : productsAndDealsList){
            Log.e(TAG,"Product name : "+dealsList.getProductName());
        }

    }

    private void ParseResponse(String response){

        try {
            JSONObject rootObj = new JSONObject(response);
            JSONArray department = rootObj.optJSONArray("departmentAndCategory");

            for (int i=0;i<department.length();i++){
                List<CategoryList> mCategoryList = new ArrayList<>();

                JSONObject departmentObj = department.getJSONObject(i);
                String departName = departmentObj.getString("departmentName");
                String departDesc = departmentObj.getString("departmentDescription");

                JSONArray categoryArray = departmentObj.optJSONArray("categoryList");

                    for (int j=0;j<categoryArray.length();j++){
                        JSONObject categoryObj = categoryArray.getJSONObject(j);
                        String departId = categoryObj.getString("departmentId");
                        String categoryName = categoryObj.getString("categoryName");
                        String categoryDescription = categoryObj.getString("categoryDescription");
                        String parentCategoryId = categoryObj.getString("parentCategoryId");
                        CategoryList categoryList = new CategoryList(categoryName,categoryDescription,
                                departId,parentCategoryId);
                        mCategoryList.add(categoryList);
                    }

                DepartmentAndCategory departmentAndCategory = new DepartmentAndCategory(
                        departName,departDesc,mCategoryList
                );

                departmentAndCategoryList.add(departmentAndCategory);
            }

            JSONArray product = rootObj.optJSONArray("productsAndDeals");
            for (int i=0;i<product.length();i++){
                JSONObject productObj = product.getJSONObject(i);
                String productName = productObj.getString("productName");
                ProductsAndDeals productsAndDeals = new ProductsAndDeals(productName);

                productsAndDealsList.add(productsAndDeals);
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }
    }


}

如何从我们自动生成的 pojo class 中获取和显示 json 数组数据？

how to get and display json array data from our auto generated pojo class?

android

json

pojo