server\business\Account.java ......\........\CommonAccount.java ......\........\EnterpriseAccount.java ......\........\User.java ......\........\VipAccount.java ......\dao\Dao.java ......\network\BankService.java ......\.......\FromOperation.java ......\.......\Teller.java ......\business ......\dao ......\network ......\ui server