减少数据访问层中的代码重复。
数据访问层使用什么实现？
希望使用XML文件来定义数据访问层。
清单4中的方法构成了数据访问层的核心。
The methods in Listing 4 form the core of the data access tier.
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.
在运行过程中，它还会与数据访问层进行交互。
In the process, it also interacts with the data access layer.
首先看看这个应用程序，特别是它的数据访问层。
Begin by taking a look at this application, specifically its data access layer.
业务层主要通过数据访问层与信息系统实现交互。
The business layer generally interacts with the information system through 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.
使用比jdbc少得多的代码自动生成简单的数据访问层。
Auto-generate simple data access layer with much less code than JDBC.
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.
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.
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.
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