正文
C++实现json字符串与map的转换
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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
#include "json.h"
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;
}
