Boost xml 解析(转)
xml_parser
[ 经试验证明，boost 库中xml 解析库对中文支持不好，解析出来是乱码 ]
头文件：
#include<boost/property_tree/ptree.hpp>
#include<boost/property_tree/xml_parser.hpp>
命名空间：
using namespaceboost::property_tree;
读入xml 文件：
xml文件内容被读入ptree 对象中，然后进行解析
ptree pt;
read_xml(“xml_file_name”, pt);
tips:
voidread_xml(const string&, ptree&pt);
voidread_xml(const string&, ptree&pt);
获取xml 文件内容
pt.get<type>(tag, default_value); // type = {string, int, long}
pt.get<string>(tag);
pt.get<int>(tag);
pt.get<long>(tag);
tag 是直接的一级节点的标签如“document“ ； 或者二级标签 “document．English“
或者tag的属性的标签
“document．English．<xmlattr>．name“
“document．English．<xmlattr>．value“
tag之获取注释内容
“document．<xmlcomment>“
<document>
<!-- [ comments ] -->
<English name="name"value="value">The world has many languages</English>
<Russian name="имя"value="значение">В мире множество языков</Russian>
<Spanish name="el nombre"value="el valor">el mundo tiene muchos idiomas</Spanish>
<SimplifiedChinese name="名字" value="价值">世界有很多语言</SimplifiedChinese>
<Русский имя="name"значение="value"><Мир></Русский>
<汉语名字="name" 价值="value">世界有很多语言</汉语>
<Heavy>"MetAl!"</Heavy>
<a>Umlaut Element</a>
</document>
对于有多个子节点的对象
BOOST_AUTO(child, pt.get_child(“DataDictionary”))
for(BOOST_AUTO(pos, child．begin()); pos != child．end(); ++pos )
{
cout<< pos->second．data() << endl;
}
<DataDictionary>
<DataField name="prov"optype="categorical" dataType="double" >1</DataField>
<DataField name="urb"optype="categorical" dataType="double" >2</DataField>
<DataField name="ses"optype="categorical" dataType="double" >3</DataField>
</DataDictionary>
写xml 文件：
voidwrite_xml(const string &, ptree& pt);
voidwrite_xml(basic_ostream &, ptree& pt);
添加节点
pt.put(tag, value); // tag = “document．English” value = “The world has many languages”
添加子节点
pt.add(tag, value);
#include<boost/property_tree/ptree.hpp>
#include <boost/property_tree/xml_parser.hpp>
int main()
{
usingnamespace boost::property_tree;
ptreept;
read_xml(“xml_file_name”, pt);
pt.put(“document．English”, “The world has many languages”);
pt.put(“document．Spanish”, “el mundo tiene muchos idiomas”);
write_xml(“new_xml_name”, pt);
write_xml(cout, pt);
}
