tinyxml用法学习

通过在http://www.grinninglizard.com/tinyxml/ 下载tinyxml最新的release版，解压后可以在docs下我们可以查看tinyxml的节本用法，为了快速的掌握，可以在class Hierarchy 中打开TiXmlBase可以发现其类图结构。

下面是我个人为了掌握或者说测试tinyxml，写的代码：

 

//#define TIXML_USE_STL#include "tinystr.h"#include "tinyxml.h"#include <string>//test #define TestRead//#define TestWritevoid main(){#ifdef TestReadchar *buf = "<?xml version='1.0' encoding='utf-8'?><soap:Envelope xmlns:soap=/"http://www.w3.org/2003/05/soap-envelope/""" xmlns:d=/"http://schemas.xmlsoap.org/ws/2005/04/discovery/" xmlns:wsadis=/"http://schemas.xmlsoap.org/ws/2004/08/addressing/""" xmlns:dn=/"http://www.onvif.org/ver10/network/wsdl/">""<soap:Header><wsadis:MessageID>uuid:""</wsadis:MessageID><wsadis:To InstanceId = /"1234/">urn:schemas-xmlsoap-org:ws:2005:04:discovery</wsadis:To>""<wsadis:Action>http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe</wsadis:Action>""</soap:Header><soap:Body><d:Probe> <d:Types> <d:shawn> <d:yogirl /> </d:shawn> </d:Types> <d:Scopes /></d:Probe></soap:Body></soap:Envelope>";TiXmlDocument *root = new TiXmlDocument();//root->LoadFile("test.xml");root->Parse((const char *)buf);if (root == NULL){printf("load file failed./n");exit(EXIT_FAILURE);}if (root->Type() == TiXmlNode::TINYXML_DOCUMENT){printf("i am a document!/n");}TiXmlHandle *pHead = new TiXmlHandle(root);//TiXmlNode *pChild = root->FirstChild();//TiXmlElement *pChild = pHead->FirstChild("soap:Envelope").FirstChild().FirstChild().Element();TiXmlElement *rootEle = root->RootElement();if (rootEle){pHead->FindChild(rootEle,"d:shawn");TiXmlElement *pChild = TiXmlHandle(pHead->m_pLookUpRoot).FirstChild().ToElement();if (pChild == NULL){printf("first child is NULL./n");}printf("%s/n",pChild->Value());}//std::string wsa_to = "wsadis:To";// TiXmlString wsa_to("wsadis:To");// // for (;pChild; pChild = pChild->NextSiblingElement())// {// int type = pChild->Type();// switch (type)// {// case TiXmlNode::TINYXML_ELEMENT:// if (wsa_to == pChild->ValueTStr())// {// printf("%s/n",pChild->Attribute("InstanceId"));// }// break;// default:// break;// }// }if (pHead != NULL){delete pHead;pHead = NULL;}if (root != NULL){delete root;root = NULL;}#endif#ifdef TestWriteTiXmlDocument *doc = new TiXmlDocument();TiXmlDeclaration *pdecl = new TiXmlDeclaration("1.0","utf-8","");TiXmlElement *pEnvelope = new TiXmlElement("soap:Envelope");pEnvelope->SetAttribute("xmlns:soap","http://www.w3.org/2003/05/soap-envelope");pEnvelope->SetAttribute("xmlns:d","http://schemas.xmlsoap.org/ws/2005/04/discovery");pEnvelope->SetAttribute("xmlns:wsadis","http://schemas.xmlsoap.org/ws/2004/08/addressing");pEnvelope->SetAttribute("xmlns:dn","http://www.onvif.org/ver10/network/wsdl");//header fabricateTiXmlElement *pHeader = new TiXmlElement("soap:Header");TiXmlElement *pMessageId = new TiXmlElement("wsadis:MessageID");TiXmlText *uuid = new TiXmlText("uuid:492febc3-6e8f-49fa-ad5b-e7d5ae402091");pMessageId->LinkEndChild(uuid);TiXmlElement *pTo = new TiXmlElement("wsadis:To");TiXmlText *to = new TiXmlText("urn:schemas-xmlsoap-org:ws:2005:04:discovery");pTo->LinkEndChild(to);TiXmlElement *pAction = new TiXmlElement("wsadis:Action");TiXmlText *action = new TiXmlText("http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe");pAction->LinkEndChild(action);pHeader->LinkEndChild(pMessageId);pHeader->LinkEndChild(pTo);pHeader->LinkEndChild(pAction);//body fabricateTiXmlElement *pBody = new TiXmlElement("soap:Body");TiXmlElement *pProbe = new TiXmlElement("d:probe");pBody->LinkEndChild(pProbe);pEnvelope->LinkEndChild(pHeader);pEnvelope->LinkEndChild(pBody);doc->LinkEndChild(pdecl);doc->LinkEndChild(pEnvelope);doc->SaveFile("send.xml");TiXmlPrinter *printer = new TiXmlPrinter();//printer->SetIndent("/t");doc->Accept(printer);printf("%s",printer->CStr());//printf("%s/n",rootElement->Value());if (doc != NULL){delete doc;doc = NULL;}#endifgetchar();} 

其中的FindChild()方法是个人实现的，不过坦白说效率着实不高，首先

xml文件组成的树的深度未知，结点数也是未知，所以我认为要查找一个

结点只能是通过遍历来解决了。

//added by shawn.TiXmlHandle TiXmlHandle::FindChild(TiXmlElement *_node, const char *value){if (_node == 0){return TiXmlHandle(0);}else if (strcmp(_node->Value(),value) == 0){/*this is the node we want to find*/m_pLookUpRoot = _node;return TiXmlHandle(_node);}else{printf("%s/n",_node->Value());TiXmlNode *cur = _node->FirstChild();if (cur){TiXmlElement *next = cur->ToElement();for (;next;next = next->NextSiblingElement()){FindChild(next,value);}}return TiXmlHandle(0);}}

m_pLookUpRoot就是要查找的结点了~~~