在Qt C ++中获取Json数组中Qstring的输出

Question

I have Written a code to get qbytearray output to Qstring list and then splited it using delimeter ',' , in qt c++

Now i need to added it into Json array

Output I am getting is

"diskinfo": "Node: ASHUTOSH-PC, Description: Local Fixed Disk, FreeSpace: 420842713088, Name: C:, Size  : 499875049472  Node: ASHUTOSH-PC, Description: CD-ROM Disc, FreeSpace: , Name: D:, Size  :   Node: ASHUTOSH-PC, Description: Local Fixed Disk, FreeSpace: 324858568704, Name: E:, Size  : 487687450624  Node: ASHUTOSH-PC, Description: CD-ROM Disc, FreeSpace: 0, Name: F:, Size  : 553459712",

Expected output is

{
  "diskinfo": "Node: ASHUTOSH-PC, Description: Local Fixed Disk, FreeSpace: 420842713088, Name: C:, Size  : 499875049472
              Node: ASHUTOSH-PC, Description: CD-ROM Disc, FreeSpace: , Name: D:, Size  : 
              Node: ASHUTOSH-PC, Description: Local Fixed Disk, FreeSpace: 324858568704, Name: E:, Size  : 487687450624 
             Node: ASHUTOSH-PC, Description: CD-ROM Disc, FreeSpace: 0, Name: F:, Size  : 553459712"
}

Now I need to get Expected output Where Starting with every node It should display in the next line in array? I need to create Json array, Then for eachline , create a json object and then split them insert that in Json object and inser that json object in jsonarray, and return that jsonarray to json . How is this poosible? Can any one help?

Following is the code I have written then after that How to creatr and isert it in Json

QString Utils::getDiskSpace()
{
    static QString diskSpaceCmd ( qgetenv("WINDIR") + 
        "\\system32\\wbem\\wmic logicaldisk get name, freespace, size, description /format:csv");

    QProcess proc;
    QByteArray qba;
    QString out_str;

    proc.start(diskSpaceCmd);

    if(proc.waitForFinished(-1))
    {
        qba = proc.readAllStandardOutput();
        qba = qba.trimmed();
        qba = qba.replace('\r',' ');
        QString myString = qba;

        QStringList myStringList = myString.split("\n");

        QStringList descriptions = myStringList[0].split(",");
        descriptions[0] = descriptions[0].remove(0, 
                             descriptions[0].indexOf(" ") + 1);

        for(int index = 1;index < myStringList.length();index++)
        {
            QStringList data = myStringList[index].split(",");
            QStringList out;
            for(int ind_2 = 0; ind_2 < data.length(); ind_2++)
                out.push_back(descriptions[ind_2] + ": " +data[ind_2]);
            out_str += out.join(", ");
        }
    }

    QString diskSpace(out_str);
    return diskSpace;
}

Pseudo code Written for What ouput I want is

ja = QJsonArray();
for (each line)
{
    QJsonObect oj;
    split("token")
    for (each token in line)
        oj.insert(descriptions, data)

    ja.insert(oj)
}
return ja.toJson

How will I this Implement in my actual code.?

Following is my utils.cpp file

    QString WctUtils::getDiskSpace( )
      {
        static QString diskSpaceCmd ( qgetenv("WINDIR")
                               + "\\system32\\wbem\\wmic logicaldisk get name, freespace, size, description /format:csv");

        QProcess proc;
        QByteArray qba;
        QString out_str;


        proc.start(diskSpaceCmd);

        if(proc.waitForFinished(-1))
         {
            qba = proc.readAllStandardOutput();
            qba = qba.trimmed();
            qba =qba.replace('\r',' ');
            QString myString =qba;

            QStringList myStringList = myString.split("\n");

            QStringList descriptions = myStringList[0].split(",");

            for(int index = 1;index < myStringList.length();index++)
             {
               QStringList data = myStringList[index].split(",");
               QStringList out;
               for(int ind_2 = 0; ind_2 < data.length(); ind_2++)
              out.push_back(descriptions[ind_2] + ": " +data[ind_2]);
               out_str += out.join(", ");
              }


             }

           QString diskSpace(out_str);
           return (diskSpace);
        }

This is where mu Json is inserted

         QJsonObject json;
            if(isRemoteServiceManagerEnabled)
             {
               QLOG_INFO() << "windows service manager web service called to get start time";

               json = JamManager::getServiceStartTimes();
               json.insert(ask::HOST_UPTIME, WctUtils::getLastBootupTime());
               json.insert(ask::DISK_INFO, WctUtils::getDiskSpace());
               json.insert(ask::CPU_USAGE,WctUtils::getcpuUsage());
               json.insert(ask::HOST, QHostInfo::localHostName());
             }

             QJsonDocument replyDoc = QJsonDocument(json);

            aResponse.setHeader(ask::CONTENT_TYPE.toLocal8Bit(),           al::JSON_HEADER.toLocal8Bit());
            aResponse.write(replyDoc.toJson());
           }

}

Answer 1

You can modify the following code:

#include <QJsonArray>
#include <QJsonObject>
#include <QJsonDocument>
#include <QFile>

QStringList infos = {"foo", "foofoo", "foofoofoo"}; // you must change it.

// create a json array and fill it.
QJsonArray arr;
foreach(QString const& info, infos)
    arr.append(info);

// create a object for converting.
QJsonObject obj;
obj["diskinfo"] = arr;

// save it.
QJsonDocument doc(obj);
QFile file("save.json");
if(file.open(QIODevice::WriteOnly))
    file.write(doc.toJson());

The output (save.json):

{
    "diskinfo": [
        "foo",
        "foofoo",
        "foofoofoo"
    ]
}

EDIT: I'll implement the above code in your first code.

void Utils::getDiskSpace(QString filename)
{
    static QString const diskSpaceCmd ( qgetenv("WINDIR") + 
        "\\system32\\wbem\\wmic logicaldisk get name, freespace, size, description /format:csv");

    QProcess proc;
    proc.start(diskSpaceCmd);
    if(proc.waitForFinished(-1))
    {
        QByteArray qba;
        qba = proc.readAllStandardOutput();
        qba = qba.trimmed();
        qba = qba.replace('\r',' ');
        QString myString(qba);

        QStringList myStringList = myString.split("\n");

        QStringList descriptions = myStringList[0].split(",");
        descriptions[0] = descriptions[0].remove(0, 
                             descriptions[0].indexOf(" ") + 1);

        QJsonArray jsarr;
        for(int index = 1;index < myStringList.length();index++)
        {
            QStringList data = myStringList[index].split(",");
            QStringList out;
            for(int ind_2 = 0; ind_2 < data.length(); ind_2++)
                out.push_back(descriptions[ind_2] + ": " +data[ind_2]);
            jsarr.append(out.join(", "));
        }

        // create a object for converting.
        QJsonObject obj;
        obj["diskinfo"] = jsarr;

        // save it.
        QJsonDocument doc(obj);
        QFile file(filename);
        if(file.open(QIODevice::WriteOnly))
            file.write(doc.toJson());
    }
}

Answer 2

Finally I got the Expected output in QJson array:

      QJsonArray disk_array;
      QStringList myStringList = myString.split("\n");

      QStringList descriptions = myStringList[0].split(",");


      for(int index = 1;index < myStringList.length();index++)
      {
          QStringList data = myStringList[index].split(",");
          QJsonObject obj_disk;
          for(int ind_2 = 0; ind_2 < data.length(); ind_2++)
          {
              obj_disk.insert(descriptions[ind_2],data[ind_2]);
          }
          disk_array.append(obj_disk);
      }


 return (disk_array);

Output obtained in Json Format:

     "diskinfo": [
    {
        "Description": "Local Fixed Disk",
        "FreeSpace": "418491035648",
        "Name": "C:",
        "Node": "ASHUTOSH-PC",
        "Size  ": "499875049472  "
    },
    {
        "Description": "CD-ROM Disc",
        "FreeSpace": "",
        "Name": "D:",
        "Node": "ASHUTOSH-PC",
        "Size  ": "  "
    },
    {
        "Description": "Local Fixed Disk",
        "FreeSpace": "324668514304",
        "Name": "E:",
        "Node": "ASHUTOSH-PC",
        "Size  ": "487687450624  "
    },
    {
        "Description": "CD-ROM Disc",
        "FreeSpace": "0",
        "Name": "F:",
        "Node": "ASHUTOSH-PC",
        "Size  ": "553459712"
    }
],