减少数据访问层中的代码重复。
数据访问层被设计为一系列粗粒度的DAO。
The data access tier is designed as a set of coarse-grained DAOs.
这是中间层之间的界面和数据访问层的行为。
This is the middle tier and ACTS between the GUI and the Data access layer.
而业务逻辑层则请求数据访问层处理数据持久性。
The Business Logic Layer, in turn, requests that the data Access Layer deal with data persistence.
当域对象离开数据访问层时，它与实体管理器脱离。
When a domain object leaves the data access tier, it gets detached from the entity manager.
业务层和数据库没有任何通讯-这些有数据访问层处理。
The Business Layer does not have any direct communication with the database - this is all handled by the Data Access Layer.
许多用户都用自己的数据访问层，使用自己的API编写业务逻辑。
Many users have their own data access layer, with their own APIs, to which the business logic is coded.
此模式鼓励您分层（表示层、域层、数据访问层）处理应用程序。
This pattern encourages you to treat an application in layers -- presentation, domain, data access.
最后，数据访问层是持久化的数据存储，比如数据库或文件存储。
Finally, the data access layer is a persistent data store, such as a database or file storage.
数据访问层提供优化的数据访问方法，与课件数据库进行连接；
The data access level provides optimized data access methods and carries on the connection with the courseware database.
如果使用数据访问层，代码将整合到其中，对于使用的应用程序是不可见的。
If a data access layer is used, the code might be consolidated there and hidden from the using application.
这些底层数据调用整合到数据访问层中，对于业务逻辑是不可见的。
These underlying data access calls are thus consolidated in the data access layer and hidden from the business logic.
同样，如果使用数据访问层，代码将整合到其中，对于使用的应用程序是不可见的。
Again, if a data access layer is used, the code can be consolidated there and hidden from the using application.
数据访问层提供了一种语义数据存储、一个用户个人文件以及规则数据库。
The data access layer provides a semantic data store, a user profile, and the rules database.
Django应用程序的模型层由 Django 的数据访问层处理。
The model layer of a Django application is handled by Django's data-access layer.
数据访问层负责对存储在企业信息系统(EIS)中的数据进行存取等操作。
The data access layer is responsible retrieving and manipulating data stored in enterprise information systems (EISs).
由于Person类是应用的数据访问层返回的东西，它绝对不适合直接被UI使用。
Since the Person class is what the app's data access layer returns, it is definitely not suited for consumption by the UI.
这里的模型可以看作数据访问层，应用程序在这里与其他数据库和信息源交互。
The Model can be seen as the data-access layer, where the application interacts with any databases and information sources.
数据访问层还可以作为连接其他系统的集成点，可以成为其他Web服务的客户端。
The data access layer can also act as an integration point to link with other systems, including being a client of other Web services.
应用定制：在UI、业务逻辑和数据访问层，针对租户的元数据驱动的应用扩展。
Application customization: metadata driven application for tenant extensions at the UI, business logic and data access layers.
泛型dao模式(也称为类型安全的DAO)对于减少数据访问层中的代码重复非常重要。
The generic DAO pattern (also called Typesafe DAO) is critical to reducing code duplication in the data access tier.
在实际的系统中，架构师会为每个软件层(表示层、业务层和数据访问层)设计类。
In an actual system, the architect would design the classes for each software layer (presentation, business, and data access).
希望通过Optim Developmentstudio生成一个简单的数据访问层。
Want a simple data access layer code generated by Optim Development studio.
pureQuery提供了一些基本的对象-表映射功能，这在开发数据访问层时非常有用。
PureQuery provides some basic object-table mapping functionality that can be very useful when you are developing your data access layer.
NET开发方式的应用表示层、业务逻辑层、数据访问层和数据存储层四层结构。
NET exploiture method: application expression layer, operation logic layer, data interview layer and data storage layer.
Spring框架用于将数据访问层、业务逻辑层和表示层中的各组件结合在一起。
Spring framework is used to tie together the components in the Data Access Layer, the Business Logic Layer, and the Presentation Layer.
我选择将这个dao封装在一个接口中，这样我就能够切换数据访问层来使用不同的持久性策略。
I choose to wrap the DAO in an interface, so I can switch my data access layer to use different persistence strategies.
至此，已经完成客户端对自定义授权与重置密码的数据访问层逻辑。现在看看客户端。
So far, we have finished examining the server-side data access layer logic for custom authentication and reset password. We will switch to the client side next.
业务规则可以集中到业务逻辑层，该层充当表示层和数据访问层之间的数据交换的中间层。
Business rules are centralized into the business logic layer that serves as an intermediary for data exchange between the presentation layer and the data access layer.
业务规则可以集中到业务逻辑层，该层充当表示层和数据访问层之间的数据交换的中间层。
Business rules are centralized into the business logic layer that serves as an intermediary for data exchange between the presentation layer and the data access layer.
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