Research And Development Of The Soft Component-based Web Information Systems

With the rapid development of the Internet, Web information system (WIS) has achieved great development. Since network technology and distributed computation technology has evolved and become mature, the development of Web information system has become more and more difficult. The direct thing that Internet has brought to it is the incremental augment of the information. Because of the lack of uniform and effective management methods, the development and maintenance of most of the systems is still in chaos. Currently WIS often adopts component development method with small granularity, which causes great random to the process of the development of the system, and in turn makes the difficulty in the maintenance of the system. In some specific fields, if we can reuse the existed design and development results, the development efficiency of the system will be increased greatly, so as to save amounts of human resources and material resources.The aim of the WIS is mainly to satisfy the incrementally sophisticated business logic and the traditional ideas of software programming have been combined to this process. However, comparing with the traditional software system, the WIS has more characters. Other than the traditional ones, it also has specific network character. So, in this perspective, it is hard to merely use traditional development methods to develop WIS effectively.This research has combined WIS with software component technology, wishing to improve the development of the whole system from the reuse of the frame design in large granularity and the component reuse in small granularity. The main creative points are as follows:1 .Analyze the reason for the crisis of the network software. Introduce the idea of usingsoftware component technology to develop WIS;2 Explicitly explain the design frame for WIS of specific fields. The paper takes the manufacturing enterprise as an example, utilizes ORM modeling tools by extracting roles, and role's tasks so as to model the user roles' task of the enterprise and gives the model of the whole system. This frame can be the foundation of new development in these fields, realizing the reuse of the frame design in large granularity;3.By analyzing and stat icing the WIS, explicitly narrate the three common components, which have been used most widely, most effectively, and most worthy in this system. The three components are Common Query Interface Formulation Component, Common Report Form Formulation Component and Role Information Analysis Component. We also discuss the opening character of the components, realize the function of inducing and translating the requirements of the user. The aim of this research is to provide a new idea about considering the system's component from the user's degree. Some of the research results have been plunged into use and taken on favorable effect.