摘要
随着Internet和电子商务的迅猛发展，人们对企业级应用程序的需求越来越大，快速、有效的开发出企业级应用程序，成为当前的迫切要求。以J2EE为代表的多层应用程序解决方案很好地满足了这个要求。J2EE是一个已经被证实了的成熟的、成功的企业级应用解决方案，拥有大量的客户，在国外已经有了很多成功的案例，在国内的应用也逐渐广泛起来。
同时全文检索技术也获得了蓬勃的发展。各大数据库厂商也大都为自己的数据库配置了全文检索引擎。由于这种引擎是完全集成在数据库中的，因此具有很高的效率，并且管理方便，易于使用。
本论文重点分析了J2EE体系结构以及其中所包含的多种关键技术，如EJB、JSP、Servlet等；并分析了Oracle数据库的全文检索技术——Oracle Text的配置和实现。论文主要内容是实现了一个文献资料库全文检索系统。该系统采用J2EE体系结构，建立起了基于Web的比较规范的三层体系结构，以Oracle数据库为数据层、以EJB为业务逻辑层、JSP+Servlet为呈现逻辑层，利用Oracle Text实现了对中英文多种格式文档的全文检索。
论文第一章概要介绍了全文检索技术的发展现状和需求，对J2EE体系结构进行了简要的介绍，并阐述了论文的主要研究对象。第二章介绍数据库全文检索技术的原理和发展趋势。第三章介绍J2EE技术，包括J2EE体系结构的发展、优势以及其中包括的关键技术，并重点讲述了EJB技术，还对J2EE和．NET进行了比较。从第四章到第六章是医学文献资料全文检索系统的设计和实现，分别为需求分析、概要设计和详细设计。在详细设计部分还阐述系统中的关键技术。并在附录C中给出系统的界面和实验结果。
The use of enterprise applications is expanding rapidly as the need for expanding Internet and E-Bussiness. So how to develop enterprise applications rapidly and effectively becomes more and more urgently. Multi-tiers application solutions such as J2EE have satisfied the demand perfectly. J2EE is a mature enterprise application solution and this is approved by the fact. J2EE has a lot of supporters and has been applied in many enterprise cases in oversea markets. And it becomes more and more popular in China.
At the same time, full-text retrieval technology develops rapidly. Many database manufacturers have equipped their products with full-text retrieval engines. Since it is integrated with database, this kind of search engine is more effectively, easy to manage and easy to use.
In this paper, J2EE architecture and many key technologies inside such as EJB, JSP, Servlet have been studied. The full-text
retrieval technology of Oracle database-Oracle Text is also
studied. A document library full-text search system is implemented. The system uses J2EE architecture. Oracle database is the data tier, EJB is the business tier, and JSP+Servlet is the display tier. Oracle Text is applied to implement full-text search in Chinese and English documents with many kinds of formats.
In chapter 1,the actuality and demand of full-text retrieval and the J2EE architecture is introduced. The main research objects are also described in this chapter. In chapter 2, the theories and development trends of full-text retrieval technology of database are introduced. In chapter 3, the J2EE architecture is described. Includes the development, advantages of J2EE architecture. The emphasis is EJB technology. And the comparison of J2EE and .NET is also described. The design and implementation of the document library full-text search system is described from chapter 4 to chapter 6. There are requirements analysis, outline design and detail implementation. The key technologies are also described in
chapter 6. The interface and experimentations result is delivered in the appendix C.
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