信息集成中的数据源访问机制分析

从系统实现的角度，将信息集成中的关键技术——异构数据源的访问机制分为四类：基于HTTP协议、基于标准接口协议、基于API以及基于本地数据库接口的访问机制，并对其基本原理、特点和使用原则加以详细介绍。对这些信息获取机制的优势和劣势进行深入分析和对比，提供了多种协议的选择原则，并简单描述其实现策略，以便对其进行封装加以集成。

Analysis of Access Mechanisms in Information Integration

From the point of implementation, the critical technology of information, that is the access mechanism of heterogeneous data sources, is divided into four types, including the mechanism based on HTTP, the mechanism based on standard interface, the mechanism based on API and the mechanism based on local database interface. This paper particularly introduces the theory, characteristic and principle of the four mechanisms. It also deep analyses and compares the advantages and disadvantages of the four mechanisms. Selection principle for mechanisms is proposed. The implementation strategy is simply described for encapsulation.