Important: Please read the Qt Code of Conduct -

How to use QJson in Qt creator (Qt 4.8.6)

  • I want to use QJson in Qt creator, I'm using Qt 4.8.6 so there is no Json lib in the QtCore like in Qt5.
    I have been to the "official sourceforge site": and it says that I should install qjson using package manage tools. So I installed libqjson0, libqjson-dev, libqjson-dbg and libqjson0-dbg package using apt-get install.
    Than I created a new project and copy the official site's example to it. I alse modified my .pro file, I added an external library ( so Qt creator automatically added the following code to the .pro file:
    @win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../../../../../usr/lib/x86_64-linux-gnu/release/ -lqjson
    else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../../../../../usr/lib/x86_64-linux-gnu/debug/ -lqjson
    else:unix: LIBS += -L$$PWD/../../../../../../usr/lib/x86_64-linux-gnu/ -lqjson
    INCLUDEPATH += $$PWD/../../../../../../usr/lib/x86_64-linux-gnu
    DEPENDPATH += $$PWD/../../../../../../usr/lib/x86_64-linux-gnu
    The file is in the x86_64-linux-gnu path.
    I also added a line including the parse.h file and other files with it:
    @INCLUDEPATH += $$PWD/../../../../../../usr/include/qjson@

    After that, I can include <parser.h>, but I can't use the function like toMap(), toString() in my code...

    I think there must be something wrong in my install procedure.
    Does anyone has an experience about installing QJson? Help Please!

  • Lifetime Qt Champion


    Indeed, Qt 4.X doesn't have support for json.

    I would say that INCLUDEPATH doesn't contain the correct path to QJson's headers, correct it and you should be good to go

Log in to reply