The Design And Implementation Of The Application Platform Of Subject-Oriented Database Middleware

With the application and development of the integrated database middleware, the technologies of Web Services, XML and data visualization based on component GIS provide a new solution to carry out data query and display. At the same time, in response to different customized requirements, application program interface can be used to implement custom functions during redevelopment. Based on those technologies, database middleware are developing towards a various functions direction. The application platform of subject-oriented database middleware is proposed in this paper, based on the traditional database middleware, the application platform integrates the abilities of subject-oriented data encapsulation and application-oriented data visualization, and has the functions of rapid modeling of practical business, online and offline data query, data display and visual operation of databases.From the perspective of summary and analysis of the implementation methods in middleware design, data storage and access, Web service call and the ways of data visualization, by using three-layers architecture design, MVC design pattern and the technologies of Web Services and XML, the database middle is designed with three-layer data storage structure and configuration mode, can offer a full-lifecycle and general data support and rapid modeling support to target business system. At the same time, combined with WinForm technology and component GIS--MapX, the functions of visual display to data and visual operation to database are implemented. Running results are showed after completing coding and testing work. My main work is as follows:1. participated in requirements capture and analysis of the application platform;2. participated in data storage design of database middleware, and independently complete coding work of the module;3. Independently complete the design and development work of middleware configuration module, data visualization module and network diagram module, and participate in design and development work of database management module.During test run and formal run period, the application platform is running in a good condition. Through the real application verification, the basic functions can solve business problems encountered in application fields and achieve the desired goals.