Data access objects may or may not match the domain objects.
数据访问对象既可以匹配也可以不匹配域对象。
The following exceptions have occurred using Data Access Objects.
使用数据访问对象时发生下列例外项。
Simulated data access objects essentially simulate a back-end datastore.
模拟数据访问对象实际上模拟后端数据存储。
In this article, you'll learn about layered testing with simulated data access objects (SDAOs).
在本文中，您将了解使用模拟数据访问对象(SDAO)进行分层测试。
In the sections that follow you'll learn techniques for designing and implementing data access objects.
在下面一节中您将学习设计和实现数据访问对象的技术。
Data access objects are responsible for operating on objects that hold data stored in a relational database.
数据访问对象负责对持有数据(存储在关系数据库中)的对象进行操作。
In this case you have a package where your data models are kept and a package where your data access objects are kept.
本例中，有一个存放数据模型的包和一个存放数据访问对象的包。
The data access tier is a set of coarse-grained data access Objects (DAOs) (see Resources) implemented as stateless session beans.
数据访问层是一系列作为无状态会话bean实现的粗粒度Data Access Objects (DAO)(参见参考资料)。
PureQuery data access objects using annotated methods are designed specifically to support both dynamic and static database access.
带注释的方法风格是专门为同时支持动态和静态数据库访问而设计的。
We've looked at transaction demarcation and logging and you now have a deeper understanding of how each applies to data access objects.
我们讨论过了事务界定和日志，现在对于如何在数据访问对象上应用它们有了更深入的理解。
In the case of geographic data access objects, the paper illustrates the geographic data access class realized by oriented-object technology.
地理数据访问对象方面，介绍了采用面向对象技术设计实现的地理数据访问类。
Presentation layer objects will depend on service layer objects, which will themselves depend on other service objects and data access objects, etc.
表示层对象会依赖于服务层对象，而这些服务层对象又依赖于其它服务对象和数据访问对象等。
The main designs are the function, architecture, data access objects of the MG_SDE test system, and some basic data structures. Finally, the test system is demonstrated.
主要设计了MG_SDE测试系统的功能、体系结构、数据访问对象，最后对系统进行了演示。
Data access Objects (DAOs) allow you to create simple components that provide access to your data without revealing the specifics of the implementation to the rest of your application.
Data Access Objects (DAO)允许您创建简单的组件，提供对数据的访问，而无需将实现的详细说明展示给应用程序的其余部分。
This article's code examples (see Download to obtain the full package) show how to use these interfaces to facilitate auditing and reduce code duplication in data access objects (DAOs).
本文的代码示例(在下载中可以获得完整的代码包)演示如何使用这些接口帮助执行审计和减少数据访问对象(DAO)中的代码重复。
Spring 2.5 adds two new annotations - @Service and @Controller - to complete the role designations for a common three-tier architecture (data access objects, services, and web controllers).
在此基础上，Spring2.5又加入了两个新的注解 —— @Service和@Controller来完成为通常的三层架构（数据访问对象、服务、web控制器）角色委任。
If you begin with the lower layers of your application and apply patterns like Data Access objects and session facades, you should not end up with domain logic in your JSPs and other View objects.
如果您从应用程序的底层开始应用一些模式(如数据访问对象和会话Facade)，您就不应该在您的JSP和其他视图对象中使用域逻辑。
Messages are converted into Service Data Objects (SDO) as soon as they arrive at a destination, which enables common access to the message content.
只要消息到达目的地，它们就会被转换成服务数据对象 (SDO)，这使得能够以通用的方式对消息内容进行访问。
But what if you could easily create XML objects, easily access and even filter XML nodes, and easily serialize the data to a string for display or storage?
但是，如果能够创建XML对象，轻松地访问和过滤xml节点，轻松地把数据序列化成显示或存储所需的字符串，那么会怎么样呢？
Security labels are database objects applied to rows and columns in order to protect data, and granted to users to give them access to protected data.
安全标签是应用到行和列上以保护数据的数据库对象，将安全标签授给用户时他们才可以访问受保护的数据。
Applications with direct JDBC access use SQL to define the queries and rely on custom code to map the result set data back to the actual business objects.
具有直接JDBC访问功能的应用程序使用SQL定义查询，并且依靠自定义代码将结果集数据映射回到实际业务对象。
PDO is an acronym for PHP Data Objects. PDO is a lean, consistent way to access databases.
PDO是PHP数据对象的缩写， 是一种访问数据库的更便捷、安全的途径。
The data objects are generally thin wrappers around the business data in tables with typical data access and relationship navigation methods.
这些数据对象通常为表格中的业务数据的瘦包装，提供数据访问和关系导航方法。
The extracted metadata includes data model objects, such as item types and their attributes, and administration objects, such as user definitions and access control lists.
提取的元数据包括一些数据模型对象，例如项目类和它们的属性，还有一些管理对象，例如用户定义和访问控制列表。
Data objects should also be closed once the data access part of your application is complete, so that the connection object associated with it is released too.
一旦应用程序的数据访问部分已经完成，还应该关闭数据对象，以便释放与之关联的连接对象。
You can use Business Objects, extensions of Service Data Objects (SDO), to provide an abstraction layer for data access.
可以使用业务对象（服务数据对象 (SDO)的扩展）为数据访问提供抽象层。
The query optimizer USES the SYSSTAT catalog views in the database to retrieve the statistical information of the database objects and determine the best way to access the data.
查询优化器使用数据库中的SYSSTAT目录视图来检索数据库对象的统计信息，并确定访问数据库的最佳方法。
By using data source objects, you have access to a pool of connections to a data source.
通过使用数据源对象，您可以访问一个连接数据源的连接池。
Once the mapping is done, you can manipulate mapped objects as normal objects and easily submit changes back to relational database without writing complex data access logic.
一旦完成映射，您就可以将他们当成普通对象来处理，无需编写复杂的数据访问逻辑就可以轻松地将更改提交回数据库。
Data Server tier, part of data Grid, buffers database access by caching objects in-memory for higher performance.
数据服务器层是数据网格的组成部分，通过在内存中缓存对象来缓冲数据库访问，以实现更高的性能。
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