com.google.gson.JsonObject cannot be cast to com.google.gson.JsonArray

问题

I have some trouble with parsing a JSON response. The response data:

{
    "deal": {
        "categorie": {
            "description": "Offres Shopping",
            "idcategorie": "1",
            "nom": "Shopping"
        },
        "conditions": "2 personne au plus",
        "dateAjout": "2013-01-07T00:00:00+01:00",
        "dateExp": "2013-01-31T00:00:00+01:00",
        "description": "nuit dans un hotel 5 etoile",
        "heurexp": "12",
        "iddeal": "1",
        "minutesexp": "30",
        "prestataire": {
            "adresse": "Qu zohour 44",
            "codePostale": "12600",
            "description": "Hotel 5 etoiles",
            "idprestataire": "1",
            "nom": "Hotel ronald",
            "pays": "France",
            "telephone": "99999999",
            "ville": "Brest"
        },
        "prix": "80.0",
        "prixHabituel": "200.0",
        "tags": "hotel",
        "titre": "Nuit 5 etoiles"
    }
}

When trying to parse this response to a List<Deal> I get this exception:

com.google.gson.JsonObject cannot be cast to com.google.gson.JsonArray

This is the code that I am using for the parse:

if (reponse != null && !reponse.isEmpty()) {
System.out.println(reponse);

Gson g = new Gson();
JsonParser parser = new JsonParser();
JsonObject jObject = parser.parse(reponse).getAsJsonObject();
JsonArray jArray =  jObject.getAsJsonArray("deal");  // here goes the Exception
for (JsonElement elem : dealArray) {
deals.add(g.fromJson(elem, Deal.class));
}

    System.out.println(deals.toString());
    return "success";
}

thanks

回答1:

Well, deal is not a JSON array, its a JSON object. Hence the exception. A JSON array, for reference, would look more like this:

"deal" : [{"attr" : "value"}, {"attr" : "value"}]

来源：https://stackoverflow.com/questions/14189439/com-google-gson-jsonobject-cannot-be-cast-to-com-google-gson-jsonarray

标签

json

casting

arrays