gson 帶泛型的轉換

json轉對象

 public static <T> T json2Obj(String json, Class<T> cls) {
        Gson gson = new Gson();
        return gson.fromJson(json, cls);
    }

json轉list object

不少例子根本都不是泛型的，還標榜泛型，真是誤導他人

能夠參考下面的方式來實現

public static <T> List<T> json2ListObj(String json, Class<T> cls) {
        List reList = new ArrayList();
        JsonElement jsonElement = new JsonParser().parse(json);
        JsonArray array = jsonElement.getAsJsonArray();
        Iterator iterator = array.iterator();
        Gson gson = new Gson();

        while (iterator.hasNext()) {
            JsonElement json2 = (JsonElement) iterator.next();
            T contact = gson.fromJson(json2, cls);
            //can set some values in contact, if required
            reList.add(contact);
        }

        return reList;
    }

 

 

不帶泛型的json轉list

 

 gson.fromJson(json, new TypeToken<List<YourClass>>() {}.getType());