下开户、存款、取款、查询、转账、改密码、销户等七项工作。日志记录所有对账户的操作。 所有的数据持久化。开发工具为eclipse，开发语言Java，应用数据库MySql。-The following accounts, deposits, withdrawals, inquiries, transfers, change your password, cancel the account and other seven work. All logging operations on the acc