本文介绍c++编写的xml解析库——pugixml,能解析xml内容,支持xpath解析,同时能够跨linux平台,非常方便。
总结一下使用步骤和简单的使用方法:
std::strFile = "../test.xml";
pugi::xml_document doc;
if (!doc.load_file(strFile.c_str()))
{ return ;}
std::strText = "testing";
pugi::xml_document doc;
if (!doc.load(strText.c_str()))
{ return ;}
<?xml version="1.0" encoding="utf-8" ?>
<root>
<!-- 输入参数配置 -->
<form ip="10.2.134.243" port="80" action="sisserver.php">
<input name="data_type" value="POI" />
<input name="query_type" value="TQUERY" />
<input name="category" value="" />
<!-- 查询词的返回结果xpath配置 -->
<xpath poiroot="//list/poi" idfield="pguid" namefield="name"/>
<!-- 评分权重配置 r1~r4-期望结果的权重,n1~n10-实际查询结果的排名权重-->
<weight>
<!-- 查询词正常得分阀值 -->
<threshold>3</threshold>
<!-- 计算分数分布情况的步长值 -->
<step>0.5</step>
</weight>
</root>
读取代码:std::string strFile = "/bak/workspace/test/src/params.xml";
pugi::xml_document doc;
if (!doc.load_file(strFile.c_str()))
{return 0;}
pugi::xml_node form = doc.child("root").child("form");
std::string ip = form.attribute("ip").value();
std::string port = form.attribute("port").value();
char cBuf[2083];
sprintf(cBuf, "http://%s:%s/%s?", ip.c_str(), port.c_s());
std::string strTemp(cBuf);
std::string m_strURLBase = strTemp;
for (pugi::xml_node input = form.first_child(); input;input = input.next_sibling())
{
std::string strValue = input.attribute("value").value();
if (!strValue.empty())
{
std::string strName = input.attribute("name").value();
sprintf(cBuf, "%s=%s&", strName.c_str(), strValue.c_str());
std::string strTemp(cBuf);
m_strURLBase += strTemp;
}
}
//读取xpath
pugi::xml_node xpath = doc.child("root").child("xpath");
std::string m_strPOIRoot = xpath.attribute("poiroot").value();
std::string m_strPOIID = xpath.attribute("idfield").value();
//读取评分权重
pugi::xml_node weight = doc.child("root").child("weight");
float m_fThred = atof(weight.child_value("threshold"));
float m_fStep = atof(weight.child_value("step"));<?xml version="1.0" encoding="utf-8" ?>
<root>
<list count="3" time"10">
<poi>
<pguid>123</pguid>
<name>xx1</name>
</poi>
<poi>
<pguid>456</pguid>
<name>xx2</name>
</poi>
<poi>
<pguid>789</pguid>
<name>xx3</name>
</poi>
</list>
</root> //从strWebContent内容中解析出pguid和name
pugi::xml_document doc;
pugi::xml_parse_result result = doc.load(strWebContent.c_str());
if (!result)
{return -1;}
pugi::xpath_node_set tools = doc.select_nodes(m_strPOIRoot.c_str());
for (pugi::xpath_node_set::const_iterator it = tools.begin();
it != tools.end(); ++it)
{
pugi::xpath_node node = *it;
string strPOI = node.node().child_value(m_strPOIID.c_str());
string strName = node.node().child_value(m_strPOIName.c_str());
}原文:http://blog.csdn.net/qingzai_/article/details/44982725