使用boost中的property_tree实现配置文件

 1 struct person
 2 {
 3  int age;
 4  std::string name;
 5 };
 6 
 7 struct debug_persons
 8 {
 9  int itsTotalNumber;
10  std::vector<person> itsPersons;
11  void load(const std::string& filename);
12  void save(const std::string& filename);
13 };

 1 void debug_persons::save( const std::string& filename )
 2 {
 3  using boost::property_tree::ptree;
 4  ptree pt;
 5 
 6  pt.put("debug.total", itsTotalNumber);
 7 
 8  BOOST_FOREACH(const person& p,itsPersons)
 9  {
10   ptree child;
11   child.put("age",p.age);
12   child.put("name",p.name);
13   pt.add_child("debug.persons.person",child);
14  }
15  // Write property tree to XML file
16  write_xml(filename, pt);
17 
18 }
19 
20 void debug_persons::load( const std::string& filename )
21 {
22  using boost::property_tree::ptree;
23  ptree pt;
24 
25  read_xml(filename, pt);
26  itsTotalNumber = pt.get<int>("debug.total");
27 
28  BOOST_FOREACH(ptree::value_type &v, pt.get_child("debug.persons"))
29  { 
30   //m_modules.insert(v.second.data());
31   person p;
32   p.age = v.second.get<int>("age");
33   p.name = v.second.get<std::string>("name");
34   itsPersons.push_back(p);
35  }
36 }

 1 int _tmain(int argc, _TCHAR* argv[])
 2 {
 3  
 4  try
 5  {
 6   　　debug_persons dp;
 7   　　dp.load("debug_persons.xml");
 8   　　std::cout<<dp<<std::endl;
 9   　　person p;
10   　　p.age = 100;
11   　　p.name = "old man";
12   　　dp.itsPersons.push_back(p);
13   　　dp.save("new.xml");
14   　　std::cout << "Success\n";
15  }
16  catch (std::exception &e)
17  {
18   std::cout << "Error: " << e.what() << "\n";
19  }
20  return 0;
21 }

 1 std::ostream& operator<<(std::ostream& o,const debug_persons& dp)
 2 {
 3  　　o << "totoal:" << dp.itsTotalNumber << "\n";
 4  　　o << "persons\n";
 5  　　BOOST_FOREACH(const person& p,dp.itsPersons)
 6  　　{
 7   　　　　o << "\tperson: Age:" << p.age << " Nmae:" << p.name << "\n";
 8  　　}
 9  return o;
10 }

1 #include <boost/property_tree/ptree.hpp>
2 #include <boost/property_tree/xml_parser.hpp>
3 #include <boost/foreach.hpp>
4 #include <vector>
5 #include <string>
6 #include <exception>
7 #include <iostream>