The Design And Implementation For A Management System Of Electronic Bank Device Based On The 3-tier Client/Server Model

With the expanse of enterprises, 3-tier Client/Server Model is taking the place of the traditional 2-tier Client/Server model, and is widely used in practice. Combined with the development of a management system of electronic bank device, this paper puts forward a new model to design and implement distributed application systems based on the 3-tier Client/Server model. It will be valuable for the development of some similar application systems.In the management system of electronic bank device, we follow the five principles to form 3-tier C/S model for application system, presentation/function interface, function/data interface, security, transaction processor for integrated environment, and data management in distributed environment. We also design a new scheme to design and implement 3-tier C/S distributed system with the object-oriented interface technology utilized. On the one hand, this scheme escapes lots of technique problems and high expenditure for software development, which are involved in the development with the model of CORBA or J2EE. On the other hand, with the ripe OOP interface technology, the scheme resolves several problems in the present Distributed Systems, such as complicated technology, hard operation and so on. To build 3-tier C/S model with the object-oriented interface technology can make the whole design hierarchy clear, lower coupling degree among modules effectively, reduce program modification in a large scale which was triggered by requirement change, improve the coding efficiency, and shorten software development period. The new scheme combine virtues of most C/S models, have the uniform user interface in the B/S model as well, and also have the superior architecture in the multi-tier models. It's predictable to be the first scheme to the development of middle or small Distributed Systems.In addition, this paper also discusses several problems such as system security, authorization control, data management in distributed environment and so on.