College Multi-tier Distributed Component-based Mis And Implementation

At present, the research in the management information system (MIS) on longitudinally is still taking the computer as the main direction and mainly concentrating on the application development of the industry in the crosswise view. With the development of the computer and network, all the various trades and occupations have established the new MIS which is based on computer and the network. Therefore, the research in the present MIS of industry has become the key part of the crosswise research of MIS. The realization of the MIS discussed in this thesis is the application system of industry which serves for the recruitment in universities.In the last few years, both the art specialties which are provided by the ordinary universities and the number of the examinee have increased a lot. And the requirement on how to manage the recruitment has become higher and higher. In order to guarantee the recruitment of the art go fairly and justly and enhance the working efficiency and quality by fully using the modern information technology, such as the computer, many domestic universities have developed their own MIS for the art recruitment. However, most MIS is still the traditional one which has two-tier C/S structure. This kind of structure suits to the mass data maintenance, but can only run under the safe and fast network environment which has small scale and less user. Its flaws mainly include that lacking auto adaptability, short life cycle, existing the underlying possibility of deadlock and system collapse during the connection of multi-user and multi-database, bad security, not easy to maintain, having difficulty in software reuse and poor portability. The three-tier B/S pattern has been invented along with the development of the Internet/Intranet. It separates the business and processing logic of the two-tier C/S pattern from the client and the web server alone in one tier of the C/S pattern undertakes its duty. Such structure is fit for many applications, such as remote data inquiry. It's easy to maintain the business logic, but has the shortage of the weak interaction, data-handling capacity and so on.In view of the above question, this thesis proposed a kind of distributed application system which is based on component and established on the three-tier C/S structural model. The component technology is a kind of new software engineering technology which has developed after the object-oriented technology. It's the extending of the object-oriented technology and has the characteristic of openness, integration, flexibility, modularity, manageability, security, transparency and so on. The three-tier C/S structural model has the merits of the traditional C/S and B/S. It separates the service application which is taken as a tier (application tier) of the customer end from the traditional two-tier structure of C/S. It uses the component technology to integrate the service application into a series of components and registers all the components on the server (application server), thus has formed the distributed database management system of C/S/S three-tier structure. This kind of structure can do the centralized management of the service application code and share the customer-end application. Its advantages are as...