| With the rapid development of computer network technology, the enterprise needs to have a lot of information management system to maintain enterprise data with the process of the information construction. Because of the relative independence among enterprises within the enterprise, it results in a building system data distribution, autonomy and heterogeneity.With the increasingly intense competition enterprise, independent of the database information has failed to meet business institutions to complex the needs of the business, so there is the urgent need to put these individual data systems related organically sharing information and improving the operational efficiency of enterprises. Therefore, heterogeneous data integration becomes an import-ant component of the enterprise in managing information data,it can related data resources of enterprises integrate effectively through solving data integration which is cross-platform, multiple allegiance and multiple structure for enterprise's decision supp-ort.So how to effectively to the integration of it becomes an important research subject.Based on the analysis of the research achievements at home and abroad, the heterogeneous data integration technology was deeply studied in this paper.Fristly,this paper introduced the related theory of it;Secondly, detailedly researched on XML communication mechanisms and given the XML format and database mapping rules in order to realize the XML standard format. Finally,based on the design thought of present heterogeneous data integration technology,this paper designed the overall framework and function modules of the highway passenger transport system.Using UniEAP 2.0 development environment and Java language realized query language method of the heterogeneous data integration and verified its validity practical.In practical, three layer structure system solutions of UniEAP 2.0 which are presentation layer, logical layer and persistent layer not only solved the problem of the heterogeneous data integration applications,but also had easy to expand, system with data maintenance strong characteristics. |