Question

C++ 如何读取和创建XML？

Answer 1

我最近使用了一个第三方的XML库，TinyXml，开源代码。
下面是我使用XML的代码：

#include <string>
#include <vector>
using namespace std;
typedef struct
{
string User;
string ID;
string SN;
string Date;
int Active;
}UserType;

int TForm1::CreateLicenseFile(char *FileName, vector<UserType> &User)
{
char Buf[256];
TiXmlElement* rootElement1;
TiXmlElement* rootElement2;
TiXmlDocument doc;
TiXmlDeclaration * decl = new TiXmlDeclaration( "1.0", "GB2312", "" );
doc.LinkEndChild(decl);
rootElement1 = new TiXmlElement("LicenseManager");
doc.LinkEndChild(rootElement1);
for(vector<UserType>::iterator iter=User.begin();iter!=User.end();++iter)
{
if(iter->Active==0) continue;
rootElement2 = new TiXmlElement("License");
rootElement1->LinkEndChild(rootElement2);
rootElement2->SetAttribute("User", iter->User.c_str());
rootElement2->SetAttribute("ID", iter->ID.c_str());
rootElement2->SetAttribute("SN", iter->SN.c_str());
rootElement2->SetAttribute("Date", iter->Date.c_str());
}
if(!doc.SaveFile(FileName)) return 0;
return 1;
}
int TForm1::LoadLicenseFile(char *FileName, vector<UserType> &User)
{
TiXmlElement* rootElement1;
TiXmlElement* rootElement2;
TiXmlDocument doc;
User.clear();
if(!doc.LoadFile(FileName)) return 0;
rootElement1 = doc.RootElement();
rootElement2=rootElement1->FirstChildElement("License");
while(rootElement2!=NULL)
{
UserType item;
item.User=rootElement2->Attribute("User");
item.ID=rootElement2->Attribute("ID");
item.SN=rootElement2->Attribute("SN");
item.Date=rootElement2->Attribute("Date");
item.Active=1;
User.push_back(item);
rootElement2=rootElement2->NextSiblingElement();
}
return 1;
}

生成的XML文件的内容：
<?xml version="1.0" encoding="GB2312" ?>
<LicenseManager>
<License User="Sun" ID="04b59c3c" SN="ca211bd3ca9dc272f7663ab1f3b3c29b" Date="2012-08-19 14:31:20.343" />
<License User="ShowTime" ID="04b58cdc" SN="1a1a41eb46d8629243a3d7dea43a426a" Date="2012-08-19 14:31:11.031" />
<License User="TEST-PC" ID="04b58c3c" SN="9a28ab35a08b90dd6a7855781eb79335" Date="2012-06-28 09:26:19.759" />
<License User="ISLAND-BEB1AEDD" ID="7854efb8" SN="eedf940638a5db01e971bd50a93b54cf" Date="2012-08-19 14:30:33.968" />
</LicenseManager>