#include <QtCore/QJsonDocument>
#include <QtCore/QJsonObject>
#include <QtCore/QDebug>

class MyClass
{
public:
    MyClass(const QString &name, int age)
        : mName(name), mAge(age)
    {}

    QString name() const { return mName; }
    int age() const { return mAge; }

    QJsonObject toJson() const
    {
        QJsonObject obj;
        obj["name"] = mName;
        obj["age"] = mAge;
        return obj;
    }

private:
    QString mName;
    int mAge;
};

int main(int argc, char *argv[])
{
    MyClass myObject("John Doe", 30);

    QJsonObject obj = myObject.toJson();
    QJsonDocument doc(obj);

    qDebug() << doc.toJson(QJsonDocument::Indented);

    return 0;
}