DAO指的是
Data Access Objects
Data Advanced Objects
Data Advanced Owner
Data Access Owner
DAO是Data Access Objects数据访问对象。DAO的设计原则是实现数据访问和业务逻辑的分离，封装最基本的增删改查方法。
青云测评
青云测评
DAO指的是
Data Access Objects
Data Advanced Objects
Data Advanced Owner
Data Access Owner
