return getSqlSession().selectOne(Building.class.getName()+".find_building_emptybed",buildingId);
int totalBed = getSqlSession().selectOne(Building.class.getName()+".find_all_building_totalbed",buildingId); int emptyBed =  getSqlSession().selectOne(Building.class.getName()+".find_building_emptybed",buildingId); return totalBed-emptyBed;
	public int findBuildingEmptyBed(int buildingId) {		return getSqlSession().selectOne(Building.class.getName()+".find_building_emptybed",buildingId);	}