0..*
场馆House
+houseid：string+housename: String+price: double+class: String+size：String+floor：String+detail：String
用户User
+userid：String+password:String+username: String+phone: String+address: String
+ Modify_info()+ Look_info()
1
付款
收款
在线轰趴场馆预定类图
后台管理员Admin
+Login_Admin()+Look_order（）
账单Bill
+billid:String+price：double+is_paid:boolean
+ Pay()+ Print()
浏览场馆信息
+ Search()+ Look()+Choose()
订单Order
+orderid：String+userid：String+houseid:List+discount: List+price: List+totalprice: double
+ Cancel_order()+ Look_order()+Modify_order()
顾客Customer
+Login_Customer()+Look_order()
场馆维护Add_del_update
+add_Commodity()+del_Commodity()+update_Commodity()
