如何在Java中使用打印对话框打印PDF文件

   JFileChooser fileChooser = new JFileChooser();

   fileChooser.setFileFilter(new FileNameExtensionFilter("PDF Files", "pdf"));

   int result = fileChooser.showOpenDialog(null);

   if (result == JFileChooser.APPROVE_OPTION) {

       File selectedFile = fileChooser.getSelectedFile();

       print(selectedFile);

   }

   PrinterJob printerJob = PrinterJob.getPrinterJob();

   printerJob.setPrintable(new PDFPrintable(file));

   try {

       printerJob.print();

   } catch (PrinterException e) {

       e.printStackTrace();

   }

   private File file;

   public PDFPrintable(File file) {

       this.file = file;

   }

   @Override

   public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {

       if (pageIndex < 0 || pageIndex >= getNumberOfPages()) {

           return NO_SUCH_PAGE;

       }

       try {

           PDDocument document = PDDocument.load(file);

           PDFRenderer renderer = new PDFRenderer(document);

           BufferedImage image = renderer.renderImage(pageIndex, 1.5f);

           Graphics2D graphics2D = (Graphics2D) graphics;

           graphics2D.translate(pageFormat.getImageableX(), pageFormat.getImageableY());

           graphics2D.drawImage(image, 0, 0, (int) pageFormat.getImageableWidth(), (int) pageFormat.getImageableHeight(), null);

           document.close();

       } catch (Exception e) {

           e.printStackTrace();

       }

       return PAGE_EXISTS;

   }

   private int getNumberOfPages() {

       try {

           PDDocument document = PDDocument.load(file);

           int numberOfPages = document.getNumberOfPages();

           document.close();

           return numberOfPages;

       } catch (Exception e) {

           e.printStackTrace();

       }

       return 0;

   }