TinyXml2解析xml用法例子

1、认识

在使用之前，先大致了解一下TinyXml2结构，只有清楚地知道这些类都指什么内容，那么在解析任何xml时，都可以很好利用TinyXml2中提供的API。

比如如下的xml：

  
  
     sister
     Shaanxi Xi'an
     13759911917
     [email protected]
  
  
     xiaoming
     Liaoning Shenyang
     15840330481
     [email protected]
  
  

结点说明：

TiXmlDeclaration 指的是，

TiXmlComment 指的是、 ，

TiXmlDocument 指的是整个xml文档，

TiXmlElement 指的是、、、等等这些节点，

TiXmlText 指的是‘gougou’、‘15840330481’这些夹在与、与、与之间的文本文字，

TiXmlAttribute 指的是节点中version、encoding，

除此之外就是 TiXmlUnknown。

2、使用

（1）最简单使用

/*
//xml格式：

    XXX
    XXX

*/

do
{
  const char * lpXmlData = response_data;    //需要解析的数据buffer
  int32_t      llXmlSize = response_data_size;  //需要解析的size

   XMLProtocal       xml;
   int avx_success = xml.Open(lpXmlData, llXmlSize);
   if (avx_success == 0)
   {
       printf("open fail!\n");
       break;
    }
    XMLElement * ResponseStatus = xml.RootElement();
    if (ResponseStatus == NULL)
    {
	break;
    }
    int stateCode = -1;

   XMLElement* statusCode = ResponseStatus->FirstChildElement("statusCode");
    if (statusCode == NULL ||  == NULL)
    {
	//...;
    }
    else
   {
	stateCode = atoi(statusCode->GetText());
	
   }
   XMLElement* statusString = ResponseStatus->FirstChildElement("statusString");
   if (statusString == NULL || statusString->GetText() == NULL)
   {
	//...;
   }
   else
   {
       //使用 statusString->GetText()	
   }

} while (0);

(2）使用XmlDocument ，纯xml文件

/*
xml格式：
*/
/*
 xxx
 xxx
 xxx
 xxx
*/
do
{
	const char * lpXmlData = data;
	int32_t      llXmlSize = data_size;

	XMLProtocal       xmlen;
	int avx_success = xmlen.Open(lpXmlData, llXmlSize);
	if (avx_success == 0){
		printf("open fail!\n");
		break;
	}
	XMLDocument * doc;
	doc = xmlen.GetDocument();
	const char* TcpHost = doc->FirstChildElement("tcphost")->GetText();
	const char* TcpPort = doc->FirstChildElement("tcpport")->GetText();
	const char* UdpHost = doc->FirstChildElement("udphost")->GetText();
	const char* UdpPort = doc->FirstChildElement("udpport")->GetText();

	if (TcpHost)
	{
	}
	if (TcpPort)
	{
	}
	if (UdpHost)
	{
	}
	if (UdpPort)
	{
	}
} while (0);

（3）多级多层解析

/*
xml格式：



XXX
XXX
XXX
XXX
XXX

 XXX 
 XXX 
 XXX 
 XXX 
 XXX 
 XXX 


... ...


XXX
XXX



*/
//解析xml
do
{
	const char * lpXmlData = data;
	int32_t      llXmlSize = data_size;

	XMLProtocal       xml;
	int avx_success = xml.Open(lpXmlData, llXmlSize);
	if (avx_success == 0)
	{
		printf("open fail!\n");
		break;
	}
	XMLElement * homeInfo = xml.RootElement();
	if (homeInfo == NULL)
	{
		break;
	}
	int state = -1;
	XMLElement* ResponseStatus = homeInfo->FirstChildElement("ResponseStatus");
	if (ResponseStatus)
	{
	XMLElement* statusCode = ResponseStatus->FirstChildElement("statusCode");
	if (statusCode == NULL || statusCode->GetText() == NULL)
	{
	}
	else
	{
	     state = atoi(statusCode->GetText());
	}
	XMLElement* statusString = ResponseStatus->FirstChildElement("statusString");
	if (statusString == NULL || statusString->GetText() == NULL)
	{
	}
	else
	{
	}
	}
	if (state == 0)  //正确响应
	{
	     XMLElement* deviceList = homeInfo->FirstChildElement("deviceList");
	    if (deviceList == NULL) break;

	    XMLNode* device = deviceList->FirstChild();
	    while (device)
	    {

		XMLElement* deviceId = device->FirstChildElement("deviceId");
		if (deviceId && deviceId->GetText())
		{
		}
		XMLElement* deviceType = device->FirstChildElement("deviceType");
		if (deviceType && deviceType->GetText())
		{
		}
		XMLElement* deviceModel = device->FirstChildElement("deviceModel");
		if (deviceModel && deviceModel->GetText())
		{
		}
		XMLElement* deviceName = device->FirstChildElement("deviceName");
		if (deviceName && deviceName->GetText())
		{
		}
			
		XMLElement* deviceStatus = device->FirstChildElement("deviceStatus");
		if (deviceStatus && deviceStatus->GetText())
		{
			
		}
		/*
		button
		*/
		XMLElement* button = device->FirstChildElement("button");
		if (button)
		{
		XMLElement* buttonName = button->FirstChildElement("buttonName");
		if (buttonName && buttonName->GetText())
		{
		}
		XMLElement* buttonStatus = button->FirstChildElement("buttonStatus");
		if (buttonStatus && buttonStatus->GetText())
		{
		}
		XMLElement* leftButton = button->FirstChildElement("leftButton");
		if (leftButton && leftButton->GetText())
		{
		}
		XMLElement* leftStatus = button->FirstChildElement("leftStatus");
		if (leftStatus && leftStatus->GetText())
		{
		}
		XMLElement* rightButton = button->FirstChildElement("rightButton");
		if (rightButton && rightButton->GetText())
		{
		}
                XMLElement* rightStatus = button->FirstChildElement("rightStatus");
		if (rightStatus && rightStatus->GetText())
		{
		}
		}
	 device = device->NextSibling();
		}
	}
} while (0);

/*

12345y
12345u
12345v

*/

XMLElement * shareList = queryShareRemain->FirstChildElement("shareList");
if (shareList == NULL) return false;

XMLNode * shareId = shareList->FirstChildElement();
int i = 0;
while (shareId)
{
	XMLElement * shareIdElement = shareId->ToElement();
	if (shareIdElement && shareIdElement->GetText())
	{
		lpShareRemain->kSharedFileList.push_back(shareIdElement->GetText());
	}		
	shareId = shareId->NextSiblingElement();
}