就像標題所說的,我試圖解析一個對象,該對象的關鍵是一個動態的String。我看了很長一段時間了一些答案,發現1 this,2 this和3 this通過gson解析具有動態密鑰的對象
爲了您的信息,我還挺新到Java,這是我第一次用JSON數據工作,並解析
JSON響應看起來像這樣:
{"Narcos": {"episodes": [{"season": 2, "name": "Episode #2.1", "number": 1}, {"season": 2, "name": "Episode #2.10", "number": 10}, {"season": 2, "name": "Episode #2.2", "number": 2}, {"season": 2, "name": "Episode #2.3", "number": 3}, {"season": 2, "name": "Episode #2.4", "number": 4}, {"season": 2, "name": "Episode #2.5", "number": 5}, {"season": 2, "name": "Episode #2.6", "number": 6}, {"season": 2, "name": "Episode #2.7", "number": 7}, {"season": 2, "name": "Episode #2.8", "number": 8}, {"season": 2, "name": "Episode #2.9", "number": 9}, {"season": 1, "name": "Descenso", "number": 1}, {"season": 1, "name": "Despegue", "number": 10}, {"season": 1, "name": "Explosivos", "number": 6}, {"season": 1, "name": "La Catedral", "number": 9}, {"season": 1, "name": "La Gran Mentira", "number": 8}, {"season": 1, "name": "The Men of Always", "number": 3}, {"season": 1, "name": "The Palace in Flames", "number": 4}, {"season": 1, "name": "The Sword of Sim\u00f3n Bolivar", "number": 2}, {"season": 1, "name": "There Will Be a Future", "number": 5}, {"season": 1, "name": "You Will Cry Tears of Blood", "number": 7}], "year": 2015}}
動態鍵,在該示例中 「Narcos」。它基本上是你想要的劇集名稱。
我嘗試了不同的方法。 對於第一個鏈接,用於解析的代碼如下所示:
ApiTest.class
Type mapType = new TypeToken<Map<String, Serie> >() {}.getType(); // define generic type
Map<String, Serie> serie = gson.fromJson(jsonString, mapType);
Serie.class
public class Serie {
private Episodes episodes;
Episodes.class
public class Episodes {
private Episode[] episode;
private int year;
插曲。類
public class Episode {
private int season;
private String name;
private int number;
當我用第一種方法去,我得到這個錯誤
Exception in thread "main" com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 41 path $..episodes
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:224)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:129)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:220)
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:41)
at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:187)
at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:145)
at com.google.gson.Gson.fromJson(Gson.java:887)
at com.google.gson.Gson.fromJson(Gson.java:852)
at com.google.gson.Gson.fromJson(Gson.java:801)
at testing.ApiTest.main(ApiTest.java:114)
Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 41 path $..episodes
at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:385)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:213)
... 9 more
當我試圖根據其他兩個線程來解析數據,我創建了一個響應類是這樣的:
PoroResponse.class
public class PoroResponse {
private Map<String, Serie> serie;
,並改變了代碼ApiTest.class到:
PoroResponse poro = gson.fromJson(jsonString, PoroResponse.class);
,並試圖獲得一個數組通過這個一起工作:
Episode[] episodes = poro.get(poro).getSerie().getEpisodes().getEpisode();
我也試圖解析它是這樣的:
Object o = new Gson().fromJson(json, Object.class);
但在雙方的最後情況下,不是我的意甲對象是NULL或我得到一個LinkedTreeMap與NULL值。
難道有人指着我正確的方向嗎?自2天以來,我一直被困在這個問題上,誠實地沒有真正的想法如何解決它。
感謝您的意見。我應該補充說Narcos是動態的關鍵。它根據對API的請求而改變。所以它總是你要求的節目的名字。 這是API的URL,如果它可能有幫助。 我將編輯我的問題,使其更清楚一點。 – Tagman
@Tagman我編輯了我的答案。請看看 – user3662708
非常感謝。這正是我所期待的。我仍然在試圖弄清爲什麼我只需要這兩個班。但代碼就像我想要的那樣工作。 – Tagman