Study And Realization Of Estate Administrative System Based On Software Component Technology

Component is meant that a kind of software component which may be repeatedly adopted for constructing other software. It can be encapsulated as object, tree class, functional module, software frame, software framework, document, analytic piece, structural pattern, etc. Software component technology is characterized as object-oriented, which adopt the soft component concept of plug-and-play type in order to set up the technology system through the combination of different components. It is considered as a group by the way that the technology development environment and system are supported by components.The industrialized trend of the software circle has caused the appearance of soft components. It is the goal that the software circle has pursued for many years to combine some software and structure the software system like hardware system. As for the development of many applied software, it will improve production efficiency greatly and reduce a large amount of repetitive work if the software developers make full utilization of existent components. As we say, the emergence of soft component technology means a substantial reform to the traditional software development process.J2EE technology provides a method based on components to design, develop, assemble and dispose the application program at enterprise level. J2EE platform has offered the distributed application program model of a multi-layer structure. This model has ability to make full use of components, data interchange on the basis of XML, unified security mode and flexible affairs control. It not only issue the new solution to the market more quickly than before , but also J2EE solution based on component independent ofplatform does not restricted by any provider' s products and application program interface (APIs ) again.This paper analyses J2EE system structure and various kinds of components of J2EE in detail through the research of current software component technology and J2EE technology: Applet, JavaBeans, Servlet, EJB and the customer end component. Attention is focused on analyzing EJB system structure and its realization especially. On this basis, certain examples can be seen of the whole process of developing EJB under the consideration of the system development of application software. To abstract some modules that are met often in the course, the feasible software component solutions are put forward to these questions.