顾名思义，DAO模式封装了访问一个对象或相关对象集中的数据的逻辑。
The DAO pattern, as its name implies, encapsulates logic for accessing data in an object or set of related objects.
我们将以对DAO设计模式和数据访问对象的概述开始。
We'll start with a review of the DAO design pattern and data access objects.
我们将从回顾数据访问对象模式入手。
We'll begin with a review of the Data Access Object pattern.
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