请注意，property_tree将键解释为路径，例如，将对“ ab” =“ z”放置将创建{“ a”：{“ b”：“ z”}} JSON，而不是{“
ab”：“ z”} 。否则，使用property_tree是微不足道的。这是一个小例子。

#include <sstream>
#include <map>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>

using boost::property_tree::ptree;
using boost::property_tree::read_json;
using boost::property_tree::write_json;

void example() {
  // Write json.
  ptree pt;
  pt.put ("foo", "bar");
  std::ostringstream buf; 
  write_json (buf, pt, false);
  std::string json = buf.str(); // {"foo":"bar"}

  // Read json.
  ptree pt2;
  std::istringstream is (json);
  read_json (is, pt2);
  std::string foo = pt2.get<std::string> ("foo");
}

std::string map2json (const std::map<std::string, std::string>& map) {
  ptree pt; 
  for (auto& entry: map) 
      pt.put (entry.first, entry.second);
  std::ostringstream buf; 
  write_json (buf, pt, false); 
  return buf.str();
}