问pdf.js缓存PDF文件吗？

EN

public class Test extends Application {

    @Override
    public void start(Stage stage) throws Exception {
        HBox root = new HBox();
        Scene scene = new Scene(root);
        WebView webView = new WebView();
        root.getChildren().add(webView);
        Button btn = new Button("load");
        btn.setOnAction(event -> {
            try {
                webView.getEngine().executeScript("PDFViewerApplication.open(\"" + new File("latex/invoice.pdf").toURI().toURL().toString() + "\");");
            } catch (MalformedURLException e) {
                e.printStackTrace();
            }
        });
        root.getChildren().add(btn);
        stage.setScene(scene);
        stage.show();
        webView.getEngine().load(new File("js/web/viewer.html").toURI().toURL().toString());
    }

    public static void main(String[] args) {
        launch(args);
    }
}