说明：  该文结合数字图书馆系统的开发介绍了J2EE 平台的一些基本特征,以及在J2EE 平台基础上实现一个数字图书馆系统的体系结构、基本功能和相关实现的细节。最后,以数字图书馆信息检索为例介绍了开发的基本过程。
(The combination of digital library system of the J2EE platform to introduce some basic features, as well as the J2EE platform based on the realization of a digital library system architecture, the realization of the basic functions and related details. Finally, digital library information retrieval as an example, introduced the basic process of development.)