qt 解析json文件

 QJsonDocument mDocument;

mDocument = QJsonDocument::fromJson(json);

    if (!mDocument.isNull())

    {

        if (mDocument.isArray()) {

            QJsonValue(mDocument.array());

        } else {

            QJsonValue(mDocument.object());

        }

        return true;

    }

if ( value.isObject())

    {

        //Get all QJsonValue childs

        foreach (QString key , value.toObject().keys()){

            QJsonValue v = value.toObject().value(key);

        }

    }

    else if ( value.isArray())

    {

        //Get all QJsonValue childs

        int index = 0;

        foreach (QJsonValue v , value.toArray()){

        }

    }