void TestRapidXml(){    char* xmlContent = new char[1024];    sprintf(xmlContent,"
     
      aaabbb
     ");    xml_document<> xmlDoc;    xmlDoc.parse<0>(xmlContent);    char* xmlContent2 = new char[1024];    sprintf(xmlContent2,"
     
      
       ");    xml_document<> xmlDoc2;    xmlDoc2.parse<0>(xmlContent2);    xml_node<>* root = xmlDoc.first_node();    for(xml_node<>* node = xmlDoc2.first_node();node!=NULL;node=node->next_sibling())    {        // 注意：这里使用xmlDoc，是大的xml，不要使用xmlDoc2.        root->append_node(xmlDoc.clone_node(node));    }    string xmlStr = "";    rapidxml::print(std::back_inserter(xmlStr),xmlDoc,0);         delete []xmlContent;    delete []xmlContent2;}