boost解析json

#include <QtCore/QCoreApplication>

#include <boost/property_tree/ptree.hpp>

#include <boost/typeof/typeof.hpp>

#include <boost/property_tree/json_parser.hpp>

#include <boost/property_tree/xml_parser.hpp>

#include <iostream>

using namespace std;

using namespace boost::property_tree;

int main(int argc, char *argv[])

{

QCoreApplication a(argc, argv);

string s = "{/"age/" : 26,/"study/":{/"language/":{/"one/":/"chinese/",/"two/":/"math/"},/"fee/":500,/"subject/":[{/"one/":/"china/"},{/"one/":/"Eglish/"}]},/"person/":[{/"id/":1,/"name/":/"chen/"},{/"id/":2,/"name/":/"zhang/"}],/"name/" : /"huchao/"}";
string s = "{age : 26,study:{
language:{one:chinese,two:math},
fee:500,
subject:[{one:china},{one:Eglish}]
},
person:[{id:1,name:chen},{id:2,name:zhang}],
name : huchao}";
ptree pt;

stringstream stream(s); //这步不知道为什么要这样

read_json<ptree>( stream, pt);

pt.put("study.language.one","physics");//修改数据（这步废了好久时间，最后通过读英文资料解决）

pt.put("study.fee",600);

string s1=pt.get<string>("age");

cout<<s1<<endl;

string s2=pt.get<string>("name");

cout<<s2<<endl;

string s3=pt.get_child("study").get_child("language").get<string>("one");

cout<<s3<<endl;

string s4=pt.get_child("study").get<string>("fee");

cout<<s4<<endl;

ptree p1,p2;

p1 = pt.get_child("study").get_child("subject");//访问多级节点中的数组数据

for (ptree::iterator it = p1.begin(); it != p1.end(); ++it)

{

p2 = it->second; //first为空

cout<<"subject="<<p2.get<string>("one")<<endl;

}

return 0;

return a.exec();

｝

//    pt.put("conf.theme", "Matrix Reloaded");

//    pt.put("conf.clock_style", 13);

//    pt.put("conf.gui", 0);

//    pt.put("conf.urls.url","http://www.url4.org");

//    pt.add("conf.urls.url","http://www.url4.org");

//    write_json("conf.json", pt);

//    read_json("conf.json",pt);

//    cout<< pt.get<string>("conf.theme") <<endl;

//    cout<< pt.get<int>("conf.clock_style") <<endl;

//    cout<< pt.get<long>("conf.gui") <<endl;

//    cout<< pt.get("conf.no_prop", 100) <<endl;

//    BOOST_AUTO(child, pt.get_child("conf.urls"));

//    for(BOOST_AUTO(pos,child.begin()); pos != child.end(); ++pos)

//    {

//        cout<<pos->second.data()<<",";

//    }

//    cout<<endl;

//         ptree pt_1,pt_11,pt_12;

//          pt_11.put("id","3445");

//          pt_11.put<int>("age",29);

//          pt_11.put("name","chen");

//          pt_12.push_back(make_pair("",pt_11));

//          pt_12.push_back(make_pair("",pt_11));

//          //replace or create child node "data"

//          pt_1.put_child("data",pt_12);

//          ostringstream os;

//          write_json(os,pt_1);

//          cout<<os.str()<

里面的有些还是比较模糊，原理不清

vs提示个错误：pnode.get<int>("x")不存在从 "char [2]" 转换到 "boost::property_tree::string_path<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,boost::property_tree::id_translator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >" 的适当构造函数

查了半天结果可以运行，这VS也有点坑人吧