商场端登录模块的业务逻辑层主要实现对其数据的加工处理，其实现主要针对用户所能操作的模块功能，以及商场端登录模块数据访问层主要实现SQL语句的拼凑，然后将SQL语句传入系统共用数据访问类中-Mall business logic side login module mainly realizes its data processing, mainly for its implementation user can operate the module functions, as well as shopping malls end login module realize the data access layer is mainly a patchwork of SQL statements, and then pass the SQL statement systems share data access class