xml_分析器.zip_XML VC_XML 解析_XML解析_vc解析xml_xml解析器

#include <windows.h> #include <msxml.h> #include <objsafe.h> #include <objbase.h> #include <atlbase.h> #pragma warning( push ) #pragma warning( disable: 4018 4786) #include <string> #pragma warning( pop ) using namespace std; const wchar_t *src=L"" L"<?xml version=\"1.0\" encoding=\"utf-16\"?>\r\n" L"<root desc=\"Simple Prog\">\r\n" L" <text>Hello World</text>\r\n" L" <layouts>\r\n" L" <lay pos=\"15\" bold=\"true\"/>\r\n" L" <layoff pos=\"12\"/>\r\n" L" <layin pos=\"17\"/>\r\n" L" </layouts>\r\n" L"</root>\r\n"; // TElem -- a simple class to wrap up IXMLDomElement and iterat its children. // name() - in <item>stuff</item> it returns "item" // val() - in <item>stuff</item> it returns "stuff" // attr(s) - in <item s=L"hello">stuff</item> it returns "hello" // subnode(b)- in <item><a>hello</a><b>there</b></item> it returns the TElem <b>there</b> // subval(b) - in <item><a>hello</a><b>there</b></item> it returns "there" // for (TElem c=e.begin(); c!=e.end(); c++) {...} - iterators over the subnodes struct TElem { CComPtr<IXMLDOMElement> elem; CComPtr<IXMLDOMNodeList> nlist; int pos; long clen; // TElem() : elem(0), nlist(0), pos(-1), clen(0) {} TElem(int _clen) : elem(0), nlist(0), pos(-1), clen(_clen) {} TElem(CComPtr<IXMLDOMElement> _elem) : elem(_elem), nlist(0), pos(-1), clen(0) {get();} TElem(CComPtr<IXMLDOMNodeList> _nlist) : elem(0), nlist(_nlist), pos(0), clen(0) {get();} void get() { if (pos!=-1) { elem=0; CComPtr<IXMLDOMNode> inode; nlist->get_item(pos,&inode); if (inode==0) return; DOMNodeType type; inode->get_nodeType(&type); if (type!=NODE_ELEMENT) return; CComQIPtr<IXMLDOMElement> e(inode); elem=e; } clen=0; if (elem!=0) { CComPtr<IXMLDOMNodeList> iNodeList; elem->get_childNodes(&iNodeList); iNodeList->get_length(&clen); } } // wstring name() const { if (!elem) return L""; CComBSTR bn; elem->get_tagName(&bn); return wstring(bn); } wstring attr(const wstring name) const { if (!elem) return L""; CComBSTR bname(name.c_str()); CComVariant val(VT_EMPTY); elem->getAttribute(bname,&val); if (val.vt==VT_BSTR) return val.bstrVal; return L""; } bool attrBool(const wstring name,bool def) const { wstring a = attr(name); if (a==L"true" || a==L"TRUE") return true; else if (a==L"false" || a==L"FALSE") return false; else return def; } int attrInt(const wstring name, int def) const { wstring a = attr(name); int i, res=swscanf(a.c_str(),L"%i",&i); if (res==1) return i; else return def; } wstring val() const { if (!elem) return L""; CComVariant val(VT_EMPTY); elem->get_nodeTypedValue(&val); if (val.vt==VT_BSTR) return val.bstrVal; return L""; } TElem subnode(const wstring name) const { if (!elem) return TElem(); for (TElem c=begin(); c!=end(); c++) { if (c.name()==name) return c; } return TElem(); } wstring subval(const wstring name) const { if (!elem) return L""; TElem c=subnode(name); return c.val(); } TElem begin() const { if (!elem) return TElem(); CComPtr<IXMLDOMNodeList> iNodeList; elem->get_childNodes(&iNodeList); return TElem(iNodeList); } TElem end() const { return TElem(clen); } TElem operator++(int) { if (pos!=-1) {pos++; get();} return *this; } bool operator!=(const TElem &e) const { return pos!=e.clen; } }; void test() { CComPtr<IXMLDOMDocument> iXMLDoc; iXMLDoc.CoCreateInstance(__uuidof(DOMDocument)); // Following is a bugfix for PocketPC. #ifdef _UNDER_CE gargle bargle iXMLDoc->put_async(VARIANT_FALSE); CComQIPtr<IObjectSafety,&IID_IObjectSafety> iSafety(iXMLDoc); if (iSafety) { DWORD dwSupported, dwEnabled; iSafety->GetInterfaceSafetyOptions(IID_IXMLDOMDocument,&dwSupported,&dwEnabled); iSafety->SetInterfaceSafetyOptions(IID_IXMLDOMDocument,dwSupported,0); } #endif // Load the file. VARIANT_BOOL bSuccess=false; // Can load it from a url/filename... //iXMLDoc->load(CComVariant(url),&bSuccess); // or from a BSTR... iXMLDoc->loadXML(CComBSTR(src),&bSuccess); // Get a pointer to the root CComPtr<IXMLDOMElement> iRootElm; iXMLDoc->get_documentElement(&iRootElm); // Thanks to the magic of CComPtr, we never need call // Release() -- that gets done automatically. TElem eroot(iRootElm); wstring desc = eroot.attr(L"desc"); // returns "Simple Prog" TElem etext = eroot.subnode(L"text"); wstring s = etext.val(); // returns "Hello World" s = eroot.subval(L"text"); // This is a shorter way to achieve the same thing TElem elays = eroot.subnode(L"layouts"); for (TElem e=elays.begin(); e!=elays.end(); e++) { int pos = e.attrInt(L"pos",-1); bool bold = e.attrBool(L"bold",false); // we suggest default values, in case the attribute is missing wstring id = e.name(); // returns "lay" or "layoff" or "layin" } } #ifdef UNDER_CE int WINAPI WinMain(HINSTANCE,HINSTANCE,LPTSTR,int) { CoInitializeEx(NULL,COINIT_MULTITHREADED); test(); CoUninitialize(); return 0; } #else int WINAPI WinMain(HINSTANCE,HINSTANCE,LPSTR,int) { CoInitialize(NULL); test(); CoUninitialize(); return 0; } #endif