Jsoncpp Library of C + + libraries

Official website Https://github.com/open-source-parsers/jsoncpp.

I am using the form of source code, from the official website to download the source code, and then copy the corresponding. h and. cpp files to your project directory. Compile and use. It is also very simple to use, mainly in the form of arrays

Use. Here's an example of a piece of code copied from your own project:

JSON data:

{
"MSG": "",
"Status": "1",
"Message": {
"Yuyue": [
{
"id": "1776",
"Tid": "2",
"userid": "77878",
"Yuyuetime": "2015-05-07",
"CATID": "5",
"Create_time": "1430130036",
"Type": "1",
"Contact": "13501621744",
"SJD": "16:00-17:00",
"From": "1",
"title": "Parent-child relationship",
"username": "Test Account",
"Padcode": null,
"Iptvcode": "021000008003"
},
{
"id": "1539",
"Tid": "2",
"userid": "33990",
"Yuyuetime": "2015-04-16",
"CATID": "746",
"Create_time": "1428458444",
"Type": "0",
"Contact": "50691881/13917894758",
"SJD": "09:00-10:00",
"from": "0",
"title": null,
"username": "Sfsfs",
"Padcode": null,
"Iptvcode": "021000008004"
}
]
}
}

Parsing code:

void Loaddocjson ()
{
Parsing JSON with Json::reader
Json::reader Reader;
Std::ifstream file;
File.Open ("Doctorylist.json");

Json::value Root;
Json::value item;
Reader.parse (File,root);

int size = root["message" ["Yuyue"].size ();

Doctoryinfo Dcinfo;

for (int i=0; i<size; ++i)
{
QString id=qstring::fromstdstring (root["message" ["Yuyue"][i]["id"].asstring ());
strcpy (Dcinfo.id,id.tostdstring (). C_STR ());

QString userid=qstring::fromstdstring (root["message" ["Yuyue"][i]["userid"].asstring ());
strcpy (Dcinfo.userid,userid.tostdstring (). C_STR ());

QString username=qstring::fromstdstring (root["message" ["Yuyue"][i]["username"].asstring ());
strcpy (Dcinfo.username,username.tostdstring (). C_STR ());

QString titleclass=qstring::fromstdstring (root["message" ["Yuyue"][i]["title"].asstring ());
strcpy (Dcinfo.titleclass,titleclass.tostdstring (). C_STR ());


QString yuyuetime=qstring::fromstdstring (root["message" ["Yuyue"][i]["Yuyuetime"].asstring ());
strcpy (Dcinfo.yuyuetime,yuyuetime.tostdstring (). C_STR ());

QString create_time=qstring::fromstdstring (root["message" ["Yuyue"][i]["Create_time"].asstring ());
strcpy (Dcinfo.create_time,create_time.tostdstring (). C_STR ());

QString iptvcode=qstring::fromstdstring (root["message" ["Yuyue"][i]["Iptvcode"].asstring ());
strcpy (Dcinfo.iptvcode,iptvcode.tostdstring (). C_STR ());

Map_docinfo.insert (Dcinfo.id,dcinfo);

Qdebug () <<dcinfo.userid<< "xxxxxxxx";
}

}

It is also worth pointing out that, for Chinese, JSON network transmission is generally Unicode encoding, parsing often garbled, in fact, the Jsoncpp library has done a perfect solution, but need to modify the next source.

Open the file json_reader.cpp, locate the CodePointToUTF8 function, and add the following code:

else if (CP <= 0X7FF)
{
Result.resize (2);
RESULT[1] = static_cast<char> (0x80 | (0x3f & CP));
Result[0] = static_cast<char> (0xC0 | (0x1f & (CP >> 6)));
}
Byliu Add-begin
else if ((CP >= 0x4e00 && CP <= 0x9fa5) | | (CP >= 0xf900 && cp<= 0xfa2d))
{
wchar_t src[2]={0};
Char dest[5]={0};
Src[0]=static_cast<wchar_t> (CP);
std::string Curlocale=setlocale (lc_all,null);
SetLocale (Lc_all, "CHS");
wcstombs_s (null,dest,5,src,2);
Result=dest;
SetLocale (Lc_all,curlocale.c_str ());
}
Beliu Add-end

Of course, the jsoncpp can be compiled into Lib library to invoke. I am using JSON in QT, the QT comes with the library did not study, but personally feel this C + + library good use. Also about xml,c++ there is a library, as if called markup, also

Very easy to use, personal feeling than the QT comes with the library is much more useful. Make an introduction in another article.

Jsoncpp Library of C + + libraries