我面临一个问题,有时Json响应返回一个对象数组,有时是对象本身,我们如何在响应类中动态处理。在当前例如:results有时会得到一个对象数组
"\"results\": " +
"[{" +
有时是对象本身
"\"results\": " +
"{" +
例如:
我们该如何处理呢?
Gson gson = new Gson();
SearchResponse response=new SearchResponse();
response= gson.fromJson("{" +
"\"completed_in\": 0.047," +
"\"max_id\": 291771567376039936," +
"\"max_id_str\": \"291771567376039936\"," +
"\"next_page\": \"?page=2&max_id=291771567376039936&q=javacodegeeks\"," +
"\"page\": 1," +
"\"query\": \"javacodegeeks\"," +
"\"refresh_url\": \"?since_id=291771567376039936&q=javacodegeeks\"," +
"\"results\": " +
"{" +
"\"created_at\": \"Thu, 17 Jan 2013 04:58:57 +0000\"," +
"\"from_user\": \"hkokko\"," +
"\"from_user_id\": 24726686," +
"\"from_user_id_str\": \"24726686\"," +
" \"from_user_name\": \"Hannu Kokko\"," +
" \"geo\": null," +
"\"id\": 291771567376039936," +
"\"id_str\": \"291771567376039936\"," +
"\"iso_language_code\": \"en\"," +
" \"metadata\": {" +
"\"result_type\": \"recent\"}," +
"\"profile_image_url\": \"hjh\"," +
"\"profile_image_url_https\": \"kkj\"," +
"\"source\": \"<a href="hj;\"," +
"\"text\": \"Continuous Deployment: Are You Afraid It Might Work? jh\"," +
"\"to_user\": null," +
"\"to_user_id\": 0," +
"\"to_user_id_str\": \"0\"," +
"\"to_user_name\": null" +
" }," +
"\"results_per_page\": 15," +
"\"since_id\": 0," +
"\"since_id_str\": \"0\"" +
"}", SearchResponse.class);
System.out.println(response.toString());
请协助...
任何人都可以通过使用不同的罐子来提出任何建议吗?
我找到了一个解决方案,我觉得可以分享这一点。代码将自动转换..如果例外响应是响应类中的arraylist...。然后,如果对象即将响应,则添加到arraylist,否则将添加到arraylist相同的清单。我们需要在响应fromJson之前更改响应。
public class ArrayAdapter<T> extends TypeAdapter<List<T>> {
private Class<T> adapterclass;
public ArrayAdapter(Class<T> adapterclass) {
this.adapterclass = adapterclass;
}
public List<T> read(JsonReader reader) throws IOException {
List<T> list = new ArrayList<T>();
Gson gson = new Gson();
if (reader.peek() == JsonToken.BEGIN_OBJECT) {
T inning = (T) gson.fromJson(reader, adapterclass);
list.add(inning);
} else if (reader.peek() == JsonToken.BEGIN_ARRAY) {
reader.beginArray();
while (reader.hasNext()) {
T inning = (T) gson.fromJson(reader, adapterclass);
list.add(inning);
}
reader.endArray();
} else {
reader.skipValue();
}
return list;
}
public void write(JsonWriter writer, List<T> value) throws IOException {
}
}
public class ArrayAdapterFactory implements TypeAdapterFactory {
@SuppressWarnings({ "unchecked" })
@Override
public <T> TypeAdapter<T> create(final Gson gson, final TypeToken<T> type) {
ArrayAdapter typeAdapter = null;
try {
if (type.getRawType() == List.class)
{
typeAdapter = new ArrayAdapter(
(Class) ((ParameterizedType) type.getType())
.getActualTypeArguments()[0]);
}
} catch (Exception e) {
e.printStackTrace();
}
return typeAdapter;
}
然后打电话
Gson gson = new GsonBuilder().registerTypeAdapterFactory(new ArrayAdapterFactory()).create();
SearchResponse response;
esponse= gson.fromJson("your json string", SearchResponse.class)
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