Gson反序列化為地圖

Question

我有這個json字符串，我需要將其反序列化為map：Map

"players_test": [
    {
        "54231f85f8e049c7bd8ac0aba3d1caf7": {
            "uuid": "54231f85f8e049c7bd8ac0aba3d1caf7",
            "name": "TomShar",
            "signup_time": "2014-07-04 16:27:16"
        }
    },
    {
        "54231f85f8e049c7bd8ac0aba3d1caf7": {
            "uuid": "54231f85f8e049c7bd8ac0aba3d1caf7",
            "name": "TomShar",
            "signup_time": "2014-07-04 16:27:16"
        }
    },
    {
        "54231f85f8e049c7bd8ac0aba3d1caf7": {
            "uuid": "54231f85f8e049c7bd8ac0aba3d1caf7",
            "name": "TomShar",
            "signup_time": "2014-07-04 16:27:16"
        }
    }
]

所以字符串應該是鍵，然后值應該是它所代表的對象。 我有一個為UUID對象編寫的自定義deseriaziler，並且經過測試和工作（這不是問題）。

編輯：

我找到了一個更好的JSON結構，我可以使用它來解決我想要的問題。

"players": {
    "54231f85-f8e0-49c7-bd8a-c0aba3d1caf7": {
        "uuid": "54231f85-f8e0-49c7-bd8a-c0aba3d1caf7",
        "name": "TomShar",
        "kills": 0,
        "assists": 0,
        "damage_dealt": 0,
        "time_alive": 0,
        "dead": false
    },
    "KEY": {
        "uuid": "KEY",
        "name": "Name",
        "kills": 0,
        "assists": 0,
        "damage_dealt": 0,
        "time_alive": 0,
        "dead": false
    },
    "KEY": {
        "uuid": "KEY",
        "name": "Name",
        "kills": 0,
        "assists": 0,
        "damage_dealt": 0,
        "time_alive": 0,
        "dead": false
    }
}

Answer 1

首先，將JSON字符串括在{...} ，然后您可以輕松地將其轉換為Map，如下所示：

class PlayerObject {
    private String uuid;
    private String name;
    private String signup_time;
    // getters & setters
}

Gson gson = new Gson();
Type type = new TypeToken<Map<String, ArrayList<Map<String, PlayerObject>>>>(){}.getType();
Map<String, ArrayList<Map<String, PlayerObject>>> map = gson.fromJson(jsonString, type);

是否可以使地圖像： Map<String, PlayerObject>玩家？

是的，您可以將其轉換為所需的格式，如下所示：

Map<String,PlayerObject> players=new HashMap<String,PlayerObject>();
for(Map<String, PlayerObject> m:map.get("players_test")){
   for(String key:m.keySet()){
       players.put(key, m.get(key));
   }
}
System.out.println(new GsonBuilder().setPrettyPrinting().create().toJson(players));