因企業內部包含各種商業邏輯,導致企業希望在網際網路上提供服務,發展WEB應用程式越來越複雜了。企業在發展的過程,發展時間和經濟花費是重要的考量。我們將解釋關於J2EE平臺來發展的好處,並告知如何使用J2EE的架構來發展企業復雜的WEB應用程式。漸近地提供可能設計的WEB架構且包括了應用程式的流程。我們將也介紹J2EE的元件包括了Servlet、JSP和EJB並順從J2EE的藍圖來建造包括在前端顯示層(Presentation tier)的動態網頁和後端中間層(Middle tier)可重覆使用的、容易維護的和高效率的企業內部元件。我們建議使用EJB來打造包含商業邏輯同步與非同步的企業元件。企業的商業邏輯是多樣化的,但在發展以WEB為基礎的服務,不外乎是B2C和B2C兩方面。所以最後我們也應用我們提出的設計技巧實作出一個範例包括了在B2C為一個網路商店和在B2B為非同步的訊息傳遞。 Through Internet, it is more complex to develop Web-based application including all various ways of business logic on World Wide Web. It is important that development time and economy cost are key values of customer application to the enterprise. We will explain the advantage about J2EE, and show how to use J2EE’s architecture to build complex Web applications. Step by step, we bring up probable Web architectures including a flow for designing enterprise Web-based applications. We introduce J2EE’s Enterprise Java components including Servlet, JSP, and enterprise beans and comply J2EE’ blueprints to construct not only simply but also strongly functional dynamic pages contained dynamic content which would be deployed inside the presentation tier of Web applications and build reusable, manageable, maintainable, and high-performance enterprise business objects which would be deployed inside the middle-tier of its Web applications. We propose building business objects with EJB-compliant to encapsulate business logic with synchronous and asynchronous operations. Enterprise business is multifaceted, but it always encompasses e-commerce (B2C) and business-to-business solution. So we implement and illustrate a simply Web-Store containing B2C and B2B which will be applied our technique and J2EE’s technology.
