使用boost中的property_tree实现配置文件

使用property_tree也很简单，boost自带的帮助中有个5分钟指南 http://www.boost.org/doc/libs/1_46_1/doc/html/boost_propertytree/tutorial.html 这里写一下使用xml来保存多维数组，在有些情况下一维数组并不能满足要求。
使用property_tree也很简单，boost自带的帮助中有个5分钟指南 http://www.boost.org/doc/libs/1_46_1/doc/html/boost_propertytree/tutorial.html 这里写一下使用xml来保存多维数组，在有些情况下一维数组并不能满足要求。 举个简单的例子吧： xml格式如下：

 debug 
 total 3 /total 
 persons 
 person 
 age 23 /age 
 name hugo /name 
 /person 
 person 
 age 23 /age 
 name mayer /name 
 /person 
 person 
 age 30 /age 
 name boy /name 
 /person 
 /persons 
 /debug 

定义结构体如下：

 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 };

复制代码

 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 }

复制代码

 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 }

复制代码

 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 }

复制代码

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