Abstract
In order to improve the efficiency of MIS development based on heterogeneous data sources, an adaptive heterogeneous database middleware and key visualization technology are proposed to realize the automatic creation of data access layers through visualization operations on the basis of heterogeneous databases. This research focused on the general access mode of various data sources in middleware, the interface of data and operation mapping between entity classes and object-oriented virtual heterogeneous databases, the associated interface technology between associated entity classes and corresponding data tables, the interface technology of cross-table and cross-database operation, the algorithm model for optimizing data access, the visualized operation interface, with the purpose is to provide a universal, powerful and easy-to-use middleware for the development of WEB-based MIS software. It will enable program developers to complete the development of data access layers (library building, entity class creation, data access operation method establishment, etc.) through simple visualized operations, and generate program code for the data access layer, which will greatly reduce the development workload and time of the MIS software in this procedure and improve the efficiency of software development.
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