基于Qt插件开发示例，插件封装成动态链接库，动态调用

QT_SYSROOT: QT_INSTALL_PREFIX:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64 QT_INSTALL_ARCHDATA:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64 QT_INSTALL_DATA:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64 QT_INSTALL_DOCS:D:/Qt/Qt5.11.1/Docs/Qt-5.11.1 QT_INSTALL_HEADERS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/include QT_INSTALL_LIBS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/lib QT_INSTALL_LIBEXECS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/bin QT_INSTALL_BINS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/bin QT_INSTALL_TESTS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/tests QT_INSTALL_PLUGINS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/plugins QT_INSTALL_IMPORTS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/imports QT_INSTALL_QML:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/qml QT_INSTALL_TRANSLATIONS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/translations QT_INSTALL_CONFIGURATION: QT_INSTALL_EXAMPLES:D:/Qt/Qt5.11.1/Examples/Qt-5.11.1 QT_INSTALL_DEMOS:D:/Qt/Qt5.11.1/Examples/Qt-5.11.1 QT_HOST_PREFIX:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64 QT_HOST_DATA:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64 QT_HOST_BINS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/bin QT_HOST_LIBS:D:/Qt/Qt5.11.1/5.11.1/msvc2017_64/lib QMAKE_SPEC:win32-msvc QMAKE_XSPEC:win32-msvc QMAKE_VERSION:3.1 QT_VERSION:5.11.1