一．MsXml创建XML文档示例
// XmlCreationDemo.cpp #include <stdlib.h> #include <stdio.h> // 引入MSXML解析器 #import <msxml4.dll> using namespace MSXML2; class InitializeCom { public: InitializeCom() { CoInitialize(NULL); // Initializes the COM library } ~InitializeCom() { CoUninitialize(); // Closes the COM library } }InitCom; int main() { char *szXmlFile = “D://china.xml“; // xml文件 IXMLDOMDocumentPtr pDoc = NULL; // xml文档 IXMLDOMProcessingInstructionPtr pProInstruction = NULL; // xml声明 IXMLDOMCommentPtr pComment = NULL; // 注释 IXMLDOMElementPtr pRootElement = NULL, pElement = NULL; // 根节点(元素) IXMLDOMNodePtr pNode = NULL, pNode1 = NULL, pNode2 = NULL; // 节点 IXMLDOMAttributePtr pAttrNode = NULL; // 属性 HRESULT hr = pDoc.CreateInstance(__uuidof(DOMDocument40)); // if (FAILED(hr)) { printf(“无法创建DOMDocument40对象，请检查是否安装并初始化了MsXml Parser库！”); return EXIT_FAILURE; } // (1)创建xml文档声明(或insertBefore根节点) pProInstruction = pDoc->createProcessingInstruction((_bstr_t)(char*)”xml”, (_bstr_t)(char*)”version=/”1.0/” encoding=/”utf-8/””); pDoc->appendChild((IXMLDOMNode*)pProInstruction); // (2)创建根节点<China> pRootElement = pDoc->createElement((_bstr_t)(char*)”China”); pDoc->PutRefdocumentElement(pRootElement); // pXMLDomDoc->documentElement = pRootElement; // (3)创建节点<China><Continent> pComment = pDoc->createComment((_bstr_t)(char*)”所在的洲”); pRootElement->appendChild((IXMLDOMNode*)pComment); // 注释 pNode = pDoc->createNode((_variant_t)(long)NODE_ELEMENT, (_bstr_t)(char*)”Continent”, (_bstr_t)(char*)””); pNode->Puttext((_bstr_t)(char*)”Asia”); // pNode->text = “Asia”; pRootElement->appendChild(pNode); // 节点 // (4)创建节点<China><Population> pComment = pDoc->createComment((_bstr_t)(char*)”人口数量”); pRootElement->appendChild((IXMLDOMNode*)pComment); // 注释 pElement = pDoc->createElement((_bstr_t)(char*)”Population”); pAttrNode = pDoc->createAttribute((_bstr_t)(char*)”Units”); pAttrNode->Puttext((_bstr_t)(char*)”Million Person”); pElement->setAttributeNode(pAttrNode); // 统计单位 pElement->setAttribute((_bstr_t)(char*)”StatisticalYear”, (_variant_t)(char*)”2000″); // 统计年份 pElement->Puttext((_bstr_t)(char*)”1,296″); pRootElement->appendChild(pElement); // 节点 // (5)创建节点<China><Municipality> pComment = pDoc->createComment((_bstr_t)(char*)”四个直辖市”); pRootElement->appendChild((IXMLDOMNode*)pComment); // 注释 pNode = pDoc->createNode((_variant_t)(long)NODE_ELEMENT, (_bstr_t)(char*)”Municipality”, (_bstr_t)(char*)””); pRootElement->appendChild(pNode); // 节点 // (6)创建节点<China><Municipality><TianJin> pNode1 = pDoc->createNode((_variant_t)(long)NODE_ELEMENT, (_bstr_t)(char*)”TianJin”, (_bstr_t)(char*)””); // 创建节点<China><Municipality><TianJin><Area> pElement = pDoc->createElement((_bstr_t)(char*)”Area”); pElement->setAttribute((_bstr_t)(char*)”Units”, (_variant_t)(char*)”Thousand Square kilometers”); // 统计单位 pElement->Puttext((_bstr_t)(char*)”12″); pNode1->appendChild((IXMLDOMNode*)pElement); // 节点 // 创建节点<China><Municipality><TianJin><Population> pElement = pDoc->createElement((_bstr_t)(char*)”Population”); pElement->setAttribute((_bstr_t)(char*)”Units”, (_variant_t)(char*)”Million Person”); // 统计单位 pElement->setAttribute((_bstr_t)(char*)”StatisticalYear”, (_variant_t)(char*)”2000″); // 统计年份 pElement->Puttext((_bstr_t)(char*)”10.01″); pNode1->appendChild((IXMLDOMNode*)pElement); // 节点 pNode->appendChild(pNode1); // (7)创建节点<China><Municipality><BeiJing>并插入<TianJin>前 pNode2 = pDoc->createNode((_variant_t)(long)NODE_ELEMENT, (_bstr_t)(char*)”BeiJing”, (_bstr_t)(char*)””); // 创建节点<China><Municipality><BeiJing><Area> pElement = pDoc->createElement((_bstr_t)(char*)”Area”); pElement->setAttribute((_bstr_t)(char*)”Units”, (_variant_t)(char*)”Thousand Square kilometers”); // 统计单位 pElement->Puttext((_bstr_t)(char*)”17″); pNode2->appendChild((IXMLDOMNode*)pElement); // 节点 // 创建节点<China><Municipality><BeiJing><Population> pElement = pDoc->createElement((_bstr_t)(char*)”Population”); pElement->setAttribute((_bstr_t)(char*)”Units”, (_variant_t)(char*)”Million Person”); // 统计单位 pElement->setAttribute((_bstr_t)(char*)”StatisticalYear”, (_variant_t)(char*)”2000″); // 统计年份 pElement->Puttext((_bstr_t)(char*)”13.82″); pNode2->appendChild((IXMLDOMNode*)pElement); // 节点 pNode->insertBefore(pNode2, (_variant_t)(IDispatch*)pNode1); // // (8)创建节点<China><Municipality><ShangHai> // (9)创建节点<China><Municipality><ChongQing> pDoc->save((_variant_t)szXmlFile); return EXIT_SUCCESS; }
生成的china.xml文档内容：
<?xml version=”1.0″ encoding=”utf-8″?> <China> <!–所在的洲–> <Continent>Asia</Continent> <!–人口数量–> <Population Units=”Million Person” StatisticalYear=”2000″>1,296</Population> <!–四个直辖市–> <Municipality> <BeiJing> <Area Units=”Thousand Square kilometers”>17</Area> <Population Units=”Million Person” StatisticalYear=”2000″>13.82</Population> </BeiJing> <TianJin> <Area Units=”Thousand Square kilometers”>12</Area> <Population Units=”Million Person” StatisticalYear=”2000″>10.01</Population> </TianJin> <ShangHai> <Area Units=”Thousand Square kilometers”>6.4</Area> <Population Units=”Million Person” StatisticalYear=”2000″>16.74</Population> </ShangHai> <ChongQing> <Area Units=”Thousand Square kilometers”>84</Area> <Population Units=”Million Person” StatisticalYear=”2000″>30.90</Population> </ChongQing> </Municipality> </China>
二．MsXml解析XML文档示例
// XmlParsingDemo.cpp #include <stdlib.h> #include <stdio.h> // 引入MSXML解析器 #import <msxml4.dll> using namespace MSXML2; class InitializeCom { public: InitializeCom() { CoInitialize(NULL); // Initializes the COM library } ~InitializeCom() { CoUninitialize(); // Closes the COM library } }InitCom; int main() { char *szXmlFile = “D://china.xml”; //上篇创建的xml文档 IXMLDOMDocumentPtr pDoc = NULL; // xml文档 IXMLDOMNodeListPtr pNodeList = NULL; // 节点链表 IXMLDOMElementPtr pRootElement = NULL, pElement = NULL; // 根节点(元素) IXMLDOMNodePtr pNode = NULL, pNode1 = NULL; // 节点 IXMLDOMNamedNodeMapPtr pAttrList = NULL; // 属性链表 IXMLDOMAttributePtr pAttrNode = NULL; // 属性 long lChilds, lAttr, i; HRESULT hr = pDoc.CreateInstance(__uuidof(DOMDocument40)); if (FAILED(hr)) { printf(“无法创建DOMDocument40对象，请检查是否安装并初始化了MsXml Parser库！”); return EXIT_FAILURE; } VARIANT_BOOL bXmlLoad = pDoc->load((_variant_t)szXmlFile); if (!bXmlLoad) // 加载失败 { printf(“加载%s失败！/n”, szXmlFile); return EXIT_FAILURE; } // (1)根节点 pRootElement = pDoc->GetdocumentElement(); printf(“root = %s/n”, (char*)pRootElement->GetnodeName()); // pRootElement->nodeName // (2)根节点的一级子节点 pNodeList = pRootElement->GetchildNodes(); // pRootElement->childNodes lChilds = pNodeList->Getlength(); // pNodeList->length for (i = 0; i < lChilds; i++) { pNode = pNodeList->Getitem(i); // pNodeList->item[i] if (pNode->GetnodeType() != NODE_COMMENT) // 过滤注释节点 { printf(“child[%d] of [%s]: [%s]/n”, i ,(char*)pRootElement->GetnodeName(), (char*)pNode->GetnodeName()); } } // (3)统计文档中所有的<Population>节点 pNodeList = pDoc->getElementsByTagName((_bstr_t)(char*)”Population”); lChilds = pNodeList->Getlength(); printf(“文档中[Population]共有%d个/n”, lChilds); // (4)根节点下的<Population>节点 pNode = pRootElement->selectSingleNode((_bstr_t)(char*)”Population”); // 已知根节点为<China>时：pNode = pDoc->selectSingleNode((_bstr_t)(char*)”China//Population”); printf(“根节点下的[Population]子节点值为%s/n”, (char*)pNode->Gettext()); pAttrList = pNode->Getattributes(); lAttr = pAttrList->Getlength(); for (i = 0; i < lAttr; i++) { pAttrNode = pAttrList->Getitem(i); printf(“Attr[%d] of [%s]: %s = %s/n”, i, (char*)pNode->GetnodeName(), (char*)pAttrNode->GetnodeName(), (char*)pAttrNode->Gettext()); } // (5)查找节点<Municipality>下的所有子节点 // “//”表示在任意一层寻找Municipality；”//*”查找<Municipality></Municipality>中的所有子节点 pNodeList = pDoc->selectNodes((_bstr_t)(char*)”//Municipality//*”); // 这里可将pDoc换成pRootElement while (pNode = pNodeList->nextNode()) { printf(“childs of [Municipality]: %s/n”, (char*)pNode->GetnodeName()); } // (6)查找节点<Municipality>下的一级子节点 pNode = pRootElement->selectSingleNode((_bstr_t)(char*)”Municipality”); pNodeList = pNode->GetchildNodes(); lChilds = pNodeList->Getlength(); for (i = 0; i < lChilds; i++) { pNode1 = pNodeList->Getitem(i); // pNodeList->item[i] printf(“child[%d] of [Municipality]: %s/n”, i, (char*)pNode1->GetnodeName()); } // (7)查询父、子、兄、弟节点 pNode = pRootElement->selectSingleNode((_bstr_t)(char*)”//TianJin”); pNode1 = pNode->GetparentNode(); // 父节点 printf(“[TianJin]的父节点为[%s]/n”, (char*)pNode1->GetnodeName()); pNodeList = pNode->GetchildNodes(); // 子节点 lChilds = pNodeList->Getlength(); for (i = 0; i < lChilds; i++) { pNode1 = pNodeList->nextNode(); printf(“child[%d] of [TianJin]: %s/n”, i, (char*)pNode1->GetnodeName()); } pNode1 = pNode->GetpreviousSibling(); // 兄节点 printf(“[TianJin]的兄节点为[%s]/n”, (char*)pNode1->GetnodeName()); pNode1 = pNode->GetnextSibling(); // 弟节点 printf(“[TianJin]的弟节点为[%s]/n”, (char*)pNode1->GetnodeName()); return EXIT_SUCCESS; }
运行结果如下：
root = China
child[1] of <China>: <Continent>
child[3] of <China>: <Population>
child[5] of <China>: <Municipality>
文档中<Population>共有5个
根节点下的<Population>子节点值为1,296
Attr[0] of <Population>: Units = Million Person
Attr[1] of <Population>: StatisticalYear = 2000
childs of <Municipality>: BeiJing
childs of <Municipality>: Area
childs of <Municipality>: Population
childs of <Municipality>: TianJin
childs of <Municipality>: Area
childs of <Municipality>: Population
childs of <Municipality>: ShangHai
childs of <Municipality>: Area
childs of <Municipality>: Population
childs of <Municipality>: ChongQing
childs of <Municipality>: Area
childs of <Municipality>: Population
child[0] of <Municipality>: BeiJing
child[1] of <Municipality>: TianJin
child[2] of <Municipality>: ShangHai
child[3] of <Municipality>: ChongQing
<TianJin>的父节点为<Municipality>
child[0] of <TianJin>: Area
child[1] of <TianJin>: Population
<TianJin>的兄节点为<BeiJing>
<TianJin>的弟节点为<ShangHai>
