使用带有变体键值的 gson 将 json 解析为 hashmap

Question

我正在使用 Gson 解析 json 响应，但是我有一些关键字段可能会更改 像这样

  {
  "id_item": "5248549",
  "id_unit": "10865300490",
  "available_quantity": "8",
  "title_item": "Casio G-Shock Bluetooth Connected Watch [GB-6900AB-1]",
  "is_wow_deal": "0",
  "img": "http://cf4.souqcdn.com/item/52/48/54/9/item_L_20130603124218_5248549.jpg",
  "additional_attributes": {
      "Brand": "Casio",
      "Watch Shape": "Round",
      "Band Material": "Resin",
      "Display Type": "Digital",
      "Targeted Group": "Men",
      "Type": "Casual Watch"
      },
  "price": "539.00 AED"
  }, {
  "id_item": "5124140",
  "id_unit": "19807600033",
  "available_quantity": "18",
  "title_item": "BlackBerry Q10 [English/Black]",
  "is_wow_deal": "0",
  "img": "http://cf4.souqcdn.com/item/51/24/14/0/item_L_20130604111349_5124140.jpg",
         "additional_attributes": {
              "Brand": "BlackBerry",
              "Operating System": "BlackBerry OS"
         },
         "price": "2,269.00 AED"
   },

additional_attributes 类可能会发生变化我正在尝试将其映射到 Hashmap，以便我可以对每个循环进行迭代；我可以进行手动解析和循环字符串响应。

下面是我打算实现的java程序，但是方法是错误的，欢迎提出任何建议。

public class test {
public static void main(String stringagr[]) {
    String abc = "{ \"additional_attributes\": {\"Brand\":     \"Samsung\",\"Operating System\": \"Android\",\"Storage Capacity\": \"8 GB\"}}";
    Gson gson = new Gson();
    attributes hashMap = gson.fromJson(abc, Attributes.class);
    for (String string : hashMap.getAdditional_attributes().keySet()) {
        if (string.length() > 0) {

        }
    }

}

class Attributes {
    HashMap<String, String> additional_attributes;

    public HashMap<String, String> getAdditional_attributes() {
        return additional_attributes;
    }

    public void setAdditional_attributes(HashMap<String, String> additional_attributes) {
        this.additional_attributes = additional_attributes;
    }
}}

我也经历过以下方法

import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class test {
    public static void main(String stringagr[]) {
        String abc = "{ \"additional_attributes\": {\"Brand\":     \"Samsung\",\"Operating System\": \"Android\",\"Storage Capacity\": \"8 GB\"}}";
    Gson gson = new Gson();

    Type fooType = new TypeToken<Map<String, String>>() {
    }.getType();
    Map<String, String> map = gson.fromJson(abc, fooType);
    for (String string : map.keySet()) {
        if (string.length() > 0) {

        }
    }

}}

Answer 1

您尝试解析的 JSON 字符串 (String abc) 无效...尝试用大括号将其括起来：{ } 表示它是 JSON 对象。

其实在你展示的JSON响应中，你可以看到整个数据都被{ }包围了，所以你可以去掉其他字段，但是你要保持JSON结构，即：

{ "additional_attributes": {...} }

Answer 2

我终于解决了，我犯了一些错误，这是答案

public class test {
    public static void main(String stringagr[]) {
    String abc = "{ \"additional_attributes\": {\"Brand\": \"Samsung\",\"Operating System\": \"Android\",\"Storage Capacity\": \"8 GB\"}}";
    Gson gson = new Gson();

    Type fooType = new TypeToken<AdditionalAttributes>() {
    }.getType();
    AdditionalAttributes  map = gson.fromJson(abc, fooType);
    for (String string : map.getAdditional_attributes().keySet()) {
        if (string.length() > 0) {

        }
    }

}
class AdditionalAttributes{
    HashMap<String, String> additional_attributes;

    public HashMap<String, String> getAdditional_attributes() {
        return additional_attributes;
    }

    public void setAdditional_attributes(HashMap<String, String> additional_attributes) {
        this.additional_attributes = additional_attributes;
    }
}}

Answer 3

jSON结构错误，正确的做法是：

---

{
 "my_data":[
     {
      "id_item": "5248549",
      "id_unit": "10865300490",
      "available_quantity": "8",
      "title_item": "Casio G-Shock Bluetooth Connected Watch [GB-6900AB-1]",
      "is_wow_deal": "0",
      "img": "http://cf4.souqcdn.com/item/52/48/54/9/item_L_20130603124218_5248549.jpg",
      "additional_attributes": {
          "Brand": "Casio",
          "Watch Shape": "Round",
          "Band Material": "Resin",
          "Display Type": "Digital",
          "Targeted Group": "Men",
          "Type": "Casual Watch"
          },
      "price": "539.00 AED"
      }, {
      "id_item": "5124140",
      "id_unit": "19807600033",
      "available_quantity": "18",
      "title_item": "BlackBerry Q10 [English/Black]",
      "is_wow_deal": "0",
      "img": "http://cf4.souqcdn.com/item/51/24/14/0/item_L_20130604111349_5124140.jpg",
             "additional_attributes": {
                  "Brand": "BlackBerry",
                  "Operating System": "BlackBerry OS"
             },
             "price": "2,269.00 AED"
       }
   ]
}

---

您应该添加： "my_data":[ 开头和结尾是 ]}