boost demos

boost_json.cpp

#include <sstream>
#include <string>
#include <boost/property_tree/json_parser.hpp>

int parseJson(const std::string &s)
{
    using boost::property_tree::ptree;
    ptree pt;
    std::stringstream ss(s);

    try{
        read_json(ss, pt);
        int uid = pt.get<int>("uid");
        std::string name = pt.get<std::string>("name");
    }
    catch(std::exception &e)
    {
        return -1;
    }

    return 0;
}

int writeJson(const std::string &s)
{
    using boost::property_tree::ptree;
    ptree pt;
    std::stringstream ss;

    try{
        pt.put<int>("uid", 123);
        pt.put<std::string>("name",  "Tom");

        boost::property_tree::write_json(ss, pt);
        s = ss.str();
    }
    catch(std::exception &e)
    {
        return -1;
    }

    return 0;
}