Design And Implementation Of Farmers’ Professional Cooperative Information Management System

XML has become the standard of data conversion in mobile internet. In the mobile Internet has a lot of XML document management XML data emerge, how to effectively and timely, become the focus of attention of the mobile Internet industry, in order to internal links and forms of data mining, we study the stored in a relational database and query XML document technology.According to the characteristics of the path expression as the main body of the XML query, we propose a method for storing XML documents in relational database, this method is based on the XPath data model, and the wendangs in the XML document Dietz coding to identify wendangs, at the same time in the database in the Dietz code to store each wendang and its parent wendang to maintain wendangs the father son relationship between as well as for the relational data into XML documents or document fragments. Using this method, we developed a middleware, named XR-System. The XR-System XML document into memory three table, the table is Wendang, Shuxing, Wenben, were used to store the XML document wendangs, shuxings and wenben.This storage method based on, we studied how to realize the XML query into a SQL query conversion problems, according to the XPath expression of converting data into XML query graph; the query graph into several sub graph, the method of rapid locating Dietz coding based XPath, accurate position that sub graph, then Dietz code is reasonable set merging; finally, according to the Dietz code of XPath rapid positioning method of Dietz code obtained from previous step sets SQL.The design of the middleware from storage, conversion and query of three modules. And one by one to realize each function, we use JDOM as the XML parser using the Java implementation of the middleware.