xml与数据库之间进行转换，xml导入数据库，再将数据库中数据到处到xml文件中,xml with conversion between the database, xml database import, and then place the database data to xml file

涉及xml数据交互，XML显示数据，XML导入数据库-Xml data related to interactive, XML to display data, XML import database

从XML文件导入数据，并根据该数据重建XML树（如果XML树已经创建，则自动释放当前XML树，然后执行导入操作）。(The data is imported from the XML file, and the XML tree is rebuilt based on that data (if the XML tree has been created, the current XML tree is automatically released, and then the import op