@Override
	public String toString() {
		return "BookCarUrl ["
				+ (bookUrl != null ? "bookUrl=" + bookUrl + ", " : "")
				+ (time != null ? "time=" + time + ", " : "")
				+ (bookStatus != null ? "bookStatus=" + bookStatus + ", " : "")
				+ (teacherCar != null ? "teacherCar=" + teacherCar : "") + "]";
	}