自己学习的时候 写的银行系统：能注册，能登陆，能存取款，注册方式2种，一种是自己注册ID密码，一种是通过系统自动生成得到ID 密码-Learning to write the banking system: registration, able to land, access to models, registered way of two kinds, one of their own login ID password, one is automatically generated by t