C++实现json字符串与map的转换

开源资源库

jsoncpp-src-0.5.0.tar.gz：
https://sourceforge.net/projects/jsoncpp/

jsoncpp-master.zip
https://github.com/open-source-parsers/jsoncpp

下面以jsoncpp050版本为例

1：map转化为jsonstr

string map2jsonstr(const map<string,string>& map_info){Json::Value jObject;for (map<string, string>::const_iterator iter = map_info.begin( ); iter != map_info.end( ); ++iter) {jObject[iter->first] = iter->second;}return jObject.toStyledString();}

2：jsonstr转化为map

string itoa_self(int i){stringstream ss;ss << i;return ss.str();}map<string,string> jsonstr2map(const string& json){Json::Reader reader;Json::Value value;map<string, string> maps;if (json.length() > 0) {if (reader.parse(json, value)) {Json::Value::Members members = value.getMemberNames();for (Json::Value::Members::iterator it = members.begin(); it != members.end(); it++) {  Json::ValueType vt = value[*it].type();switch (vt){case Json::stringValue:{maps.insert(pair<string, string>(*it, value[*it].asString()));break;}case Json::intValue:{int intTmp = value[*it].asInt();maps.insert(pair<string, string>(*it, itoa_self(intTmp)));break;}case Json::arrayValue:{std::string strid;for (unsigned int i = 0; i < value[*it].size(); i++){strid +=value[*it][i].asString();strid +=",";}if(!strid.empty()){strid = strid.substr(0,strid.size()-1);}maps.insert(pair<string, string>(*it, strid));break;}default:{break;}}//end switch}//end for}//end if}return maps;}