gson sample (JSON -> model)

JsonUtil.java

public interface JsonModel {
    // model
}

public class JsonUtil {
    @SuppressWarnings("unchecked")
    public static <T> T fromJson(String jsonText, Class<? extends JsonModel> T) {
        Gson gson = new Gson();
        return (T) gson.fromJson(jsonText, T);
    }
}