更改
returnValues = (Long[]) hotelRooms.keySet().toArray();
至
returnValues = hotelRooms.keySet().toArray(new Long[hotelRooms.size()]);
让我知道它是否有效:-)

更改
returnValues = (Long[]) hotelRooms.keySet().toArray();
至
returnValues = hotelRooms.keySet().toArray(new Long[hotelRooms.size()]);
让我知道它是否有效:-)