xml节点存在三层才能访问元素的情况,如下所示:
<?xml version="1.0" standalone="yes" encoding="utf-8"?>
<FileRoot>
<!--Setting for FileRoot-->
<Floor2>
<Floor1_1>
<Text1>t1</Text1>
<Text2>t2</Text2>
</Floor1_1>
<Floor1_2>
<Text1>t1</Text1>
<Text2>t2</Text2>
</Floor1_2>
</Floor2>
</FileRoot>
这种情况,Floor1节点我们上一节采用了_STL_2MAP_PARAM的结构体方式进行存储,接下来针对Floor2,我们可以采取如下结构体类型进行存储:
typedef struct
{
vector<string> v_param;
map<string,_STL_2MAP_PARAM> m_param;
}_STL_3MAP_PARAM,*_pSTL_3MAP_PARAM;
bool CTinyxmlEngine::Read_XML_3_Floor_Text(const char*pszPath,_STL_3MAP_PARAM&m_param)
{
TiXmlDocument doc(pszPath);
if (!doc.LoadFile())
{
return false;
}
_STL_1MAP_PARAM m_param1;
_STL_2MAP_PARAM m_param2;
const char*pszXmlValue,*pszXmlName1,*pszXmlName2,*pszXmlName3;
TiXmlElement*p_root = doc.RootElement();
for (TiXmlNode*p_node = p_root->FirstChildElement();p_node;p_node=p_node->NextSiblingElement())
{
pszXmlName1=p_node->Value();
TiXmlElement*p_element = p_node->ToElement();
m_param2.m_param.clear();
m_param2.v_param.clear();
for (TiXmlNode*p_node = p_element->FirstChildElement();p_node;p_node = p_node->NextSiblingElement())
{
pszXmlName2=p_node->Value();
TiXmlElement*p_element = p_node->ToElement();
m_param1.m_param.clear();
m_param1.v_param.clear();
for (TiXmlNode*p_node = p_element->FirstChildElement();p_node;p_node = p_node->NextSiblingElement())
{
pszXmlName3=p_node->Value();
pszXmlValue=p_node->ToElement()->GetText();
if (NULL!=pszXmlValue)
{
m_param1.v_param.push_back(pszXmlName3);
m_param1.m_param.insert(map<string, string>::value_type(pszXmlName3,pszXmlValue));
}
}
if (!m_param1.v_param.empty())
{
m_param2.v_param.push_back(pszXmlName2);
m_param2.m_param.insert(map<string,_STL_1MAP_PARAM>::value_type(pszXmlName2,m_param1));
}
}
if (!m_param2.v_param.empty())
{
m_param.v_param.push_back(pszXmlName1);
m_param.m_param.insert(map<string,_STL_2MAP_PARAM>::value_type(pszXmlName1,m_param2));
}
}
return true;
}
打印元素值:
void Print_m_param3(_STL_3MAP_PARAM m_param3)
{
vector<string>::iterator it = m_param3.v_param.begin();
for (;it!=m_param3.v_param.end();++it)
{
cout<<*it<<":"<<endl;
_STL_2MAP_PARAM m_param2;
m_param2 = m_param3.m_param[*it];
vector<string>::iterator it = m_param2.v_param.begin();
for (;it!=m_param2.v_param.end();++it)
{
cout<<" "<<*it<<":"<<endl;
_STL_1MAP_PARAM m_param1 = m_param2.m_param[*it];
vector<string>::iterator it1 = m_param1.v_param.begin();
for (;it1!=m_param1.v_param.end();++it1)
{
cout<<" "<<*it1<<": "<<m_param1.m_param[*it1]<<endl;
}
}
cout<<"======================"<<endl;
}
}
函数调用如下:
_STL_3MAP_PARAM m_param3;
m_engine.Read_XML_3_Floor_Text("Test.xml",m_param3);
Print_m_param3(m_param3);
运行结果:
同理,如果存在多个Floor2节点在同一级的情况下,我们需要获取不同Floor2节点下的元素值,则实现函数如下:
/*
<FileRoot>
<Floor2>
<Floor1_1>
<Text1>t1</Text1>
<Text2>t2</Text2>
</Floor1_1>
<Floor1_2>
<Text1>t1</Text1>
<Text2>t2</Text2>
</Floor1_2>
</Floor2>
...
</FileRoot>
*/
bool CTinyxmlEngine::Read_XML_2Floor_Text(const char*pszPath,const char*pszNode,_STL_2MAP_PARAM&m_param)
{
TiXmlDocument doc(pszPath);
if (!doc.LoadFile())
{
return false;
}
_STL_1MAP_PARAM m_param1;
const char*pszXmlValue,*pszXmlName1,*pszXmlName2;
TiXmlElement*p_root = doc.RootElement();
for (TiXmlNode*p_node = p_root->FirstChildElement();p_node;p_node=p_node->NextSiblingElement())
{
pszXmlName1=p_node->Value();
if (strcmp(pszXmlName1,pszNode)==0)
{
TiXmlElement*p_element = p_node->ToElement();
for (TiXmlNode*p_node = p_element->FirstChildElement();p_node;p_node = p_node->NextSiblingElement())
{
pszXmlName1=p_node->Value();
TiXmlElement*p_element = p_node->ToElement();
m_param1.m_param.clear();
m_param1.v_param.clear();
for (TiXmlNode*p_node = p_element->FirstChildElement();p_node;p_node = p_node->NextSiblingElement())
{
pszXmlName2=p_node->Value();
pszXmlValue=p_node->ToElement()->GetText();
if (NULL!=pszXmlValue)
{
m_param1.v_param.push_back(pszXmlName2);
m_param1.m_param.insert(map<string, string>::value_type(pszXmlName2,pszXmlValue));
}
}
if (!m_param1.v_param.empty())
{
m_param.v_param.push_back(pszXmlName1);
m_param.m_param.insert(map<string,_STL_1MAP_PARAM>::value_type(pszXmlName1,m_param1));
}
}
break;
}
}
return true;
}
调用情况如下:
m_engine.Erase_Param_2AMP(m_param2);
m_engine.Read_XML_2Floor_Text("Test.xml","Floor2",m_param2);
相同的道理,我们还可以采用一级节点_STL_1MAP_PARAM的方式进行读取,如下所示:
/*
<FileRoot>
<Floor2>
<Floor1_1>
<Text1>t1</Text1>
<Text2>t2</Text2>
</Floor1_1>
<Floor1_2>
<Text1>t1</Text1>
<Text2>t2</Text2>
</Floor1_2>
</Floor2>
...
</FileRoot>
*/
bool CTinyxmlEngine::Read_XML_1Floor_Text(const char*pszPath,const char*pszNode,const char*pszNode1,_STL_1MAP_PARAM&m_param)
{
_STL_2MAP_PARAM m_param2;
if (Read_XML_2Floor_Text(pszPath,pszNode,m_param2))
{
map<string,_STL_1MAP_PARAM>::iterator it = m_param2.m_param.find(pszNode1);
if (it!=m_param2.m_param.end())
{
m_param = it->second;
}
}
else
{
return false;
}
return true;
}
函数调用:
m_engine.Erase_Param_1AMP(m_param1);
m_engine.Read_XML_1Floor_Text("Test.xml","Floor2","Floor1_1",m_param1);