如何在Java中拆分地图项？

Question

{
    "item": {
        "Đã đặt cọc": 0,
        "Chờ duyệt": 0,
        "Mới tạo": 0,
        "Đang đặt hàng": 0,
        "Đang VC TQ-VN": 0,
        "Đang phát hàng": 0,
        "Đã nhận được hàng": 0,
        "Đã hủy": 0
    },
    "name": "Đơn mua hộ"
}

{
    "item": [
        {
            "name": "Đã đặt cọc",
            "count": "0"
        },
        {
            "name": "Chờ duyệt",
            "count": "0"
        },
         ...
    ],
    "name": "Đơn kí gửi"
}

...
HashMap<String, Object> itemSell = new HashMap<>();
// Order Sell
orderSell.put("name", "Đơn mua hộ");
for (Map.Entry<String, Long> pair : reportsStaticSellEcomos.entrySet()) {
     itemSell.put("name", pair.getKey());
     itemSell.put("count", pair.getValue());
     orderSell.put("item", itemSell);
}
summary.add(orderSell);

{
                "item": {
                    "name": "Đã hủy",
                    "count": 0
                },
                "name": "Đơn mua hộ"
            }

是的，它只显示1项。

请帮我拿到所有的，不仅仅是1

Answer 1

您的项必须是itemsell的集合，而不是单个元素。

试试这个

// Order Sell
orderSell.put("name", "Đơn mua hộ");
List<HashMap<String, Object>> items = new ArrayList<>(reportsStaticSellEcomos.entrySet().size());
for (Map.Entry<String, Long> pair : reportsStaticSellEcomos.entrySet()) {
     HashMap<String, Object> itemSell = new HashMap<>();
     itemSell.put("name", pair.getKey());
     itemSell.put("count", pair.getValue());
     items.add(itemSell);
}
orderSell.put("item", items);
summary.add(orderSell);

此外，使用hashmap 表示项并不十分有效，也不容易理解。相反，我建议您创建一个类item，在其中可以封装这些字段。

public class Item {
  private final String name;
  private final int count;
  // constructor
  // equals and hashcode
  // getter, setter
}