在Vaadin版本14+中显示PDF

import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.button.ButtonVariant;
import com.vaadin.flow.component.dependency.CssImport;
import com.vaadin.flow.component.html.Div;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.component.page.AppShellConfigurator;
import com.vaadin.flow.component.page.Push;
import com.vaadin.flow.component.page.Viewport;
import com.vaadin.flow.router.Route;
import com.vaadin.flow.server.PWA;
import com.vaadin.flow.server.VaadinRequest;
import com.vaadin.flow.server.VaadinServlet;
import com.vaadin.flow.server.VaadinServletConfiguration;
import com.vaadin.flow.server.VaadinServletService;
import com.vaadin.flow.server.VaadinServletSession;
import com.vaadin.flow.server.VaadinSession;
import com.vaadin.flow.server.WrappedSession;
import com.vaadin.flow.theme.Theme;
import com.vaadin.flow.theme.lumo.Lumo;

import javax.servlet.annotation.WebServlet;

@Route("")
@Theme(value = Lumo.class, variant = Lumo.DARK)
@PWA(name = "PDF Viewer Demo", shortName = "PDF Viewer")
@Viewport("width=device-width, minimum-scale=1, initial-scale=1, user-scalable=yes")
@Push
public class MainView extends VerticalLayout {

    public MainView() {
        PDFViewer pdfViewer = new PDFViewer();
        pdfViewer.setSrc("path/to/your/pdf/file.pdf");
        pdfViewer.setHeight("600px");
        pdfViewer.setWidth("100%");

        add(pdfViewer);
    }
}