使用boost读取XML文件详细介绍

<?xml version="1.0" encoding="utf-8"?> 
<con> 
 <id>1</id> 
 <name>fansy</name> 
 <urls> 
  <url>http://blog.csdn.net//fansongy</url> 
  <url>http://weibo.com//fansongy</url> 
 </urls> 
</con>  

#include <iostream> 
#include <boost/property_tree/ptree.hpp> 
#include <boost/property_tree/xml_parser.hpp> 
#include <boost/typeof/typeof.hpp>  
using namespace std; 
using namespace boost::property_tree; 
int main() 
{ 
  ptree pt; 
  read_xml("conf.xml",pt);   //读入一个xml文件 
  cout<<"ID is "<<pt.get<int>("con.id")<<endl; //读取节点中的信息 
  cout<<"Try Default"<<pt.get<int>("con.no_prop",100)<<endl; //如果取不到，则使用默认值 
  ptree child = pt.get_child("con");  //取一个子节点 
  cout<<"name is :"<<child.get<string>("name")<<endl;  //对子节点操作，其实跟上面的操作一样 
   
  child = pt.get_child("con.urls"); 
  for(BOOST_AUTO(pos,child.begin());pos != child.end();++pos) //boost中的auto 
   { 
     cout<<"\t"+pos->second.data()<<endl; 
   } 
  pt.put("con.name","Sword");  //更改某个键值 
  pt.add("con.urls.url",http://www.baidu.com); //增加某个键值 
  write_xml("conf.xml",pt);  //写入XML 
  getchar(); 
  return 0; 
} 

运行的显示为： 
ID is 1 
Try Default100 
name is :fansy 
    http://blog.csdn.net//fansongy 
    http://weibo.com//fansongy 

config.xml为： 
<?xml version="1.0" encoding="utf-8"?> 
<con> 
 <id>1</id> 
 <name>Sword</name> 
<urls> 
   <url>http://blog.csdn.net//fansongy</url> 
   <url>http://weibo.com//fansongy</url> 
   <url>http://www.baidu.com</url> 
</urls> 
</con>