如何在JSON中添加属性是由GSON创建的？

Question

我有以下课程

public class OrderShoppingCart {
@Expose
@SerializedName("id")
private String _id;
@Expose
@SerializedName("quantity")
private int _quantity;
private String _description;
private String _name;
private int _price;
@Expose
@SerializedName("selections")
private List<SelectionShoppingCart> _selections;

public OrderShoppingCart(String id, int quantity, String description, String name,int price, List<SelectionShoppingCart> selections) {
    _id = id;
    _quantity = Integer.valueOf(quantity);
    _description = description;
    _name = name;
    _price = price;
    _selections = selections;
}
         //HERE GET AND SETTER
}

我建立了GSON跟随

Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();
                String jsonG = gson.toJson(OrderShoppingCart.getOrders());

// OrderShoppingCart.getOrders（）返回所有属性

我得到以下

[{"id":"525b207b16b1e9ca33000143","selections":[],"quantity":1}]

但我需要这个

{items:[{"id":"525b207b16b1e9ca33000143","selections":[],"quantity":1}]}

如何添加我缺少的内容？

Answer 1

尝试创建一个JsonObject并添加一个名为items的成员并为您的Json对象赋值。

Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();
JsonObject jObj = new JsonObject();
jObj.add("items", gson.toJson(OrderShoppingCart.getOrders()));
String jsonG = jObj.toString();