您需要按比例缩小图像以适合可用区域。
private int currentPage = -1;private Image cachedScaledImage = null;public double getScaleFactor(int iMasterSize, int iTargetSize) { double dScale = 1; if (iMasterSize > iTargetSize) { dScale = (double) iTargetSize / (double) iMasterSize; } else { dScale = (double) iTargetSize / (double) iMasterSize; } return dScale;}public double getScaleFactorToFit(BufferedImage img, Dimension size) { double dScale = 1; if (img != null) { int imageWidth = img.getWidth(); int imageHeight = img.getHeight(); dScale = getScaleFactorToFit(new Dimension(imageWidth, imageHeight), size); } return dScale;}public double getScaleFactorToFit(Dimension original, Dimension toFit) { double dScale = 1d; if (original != null && toFit != null) { double dScaleWidth = getScaleFactor(original.width, toFit.width); double dScaleHeight = getScaleFactor(original.height, toFit.height); dScale = Math.min(dScaleHeight, dScaleWidth); } return dScale;}public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException { if (pageIndex >= images.size()) { return Printable.NO_SUCH_PAGE; } RenderedImage image; Graphics2D graphics2D = (Graphics2D) graphics; int width = (int)Math.round(pageFormat.getImageableWidth()); int height = (int)Math.round(pageFormat.getImageableHeight()); if (currentPage != pageIndex || cachedScaledImage == null) { currentPage = pageIndx; image = new NullOpImage((RenderedImage) images.get(pageIndex), null, null, OpImage.OP_IO_BOUND); BufferedImage imageCopy = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_ARGB); Graphics2D g2d = imageCopy.createGraphics(); g2d.drawImage(imageCopy, 0, 0, null); g2d.dispose(); double scaleFactor = getScaleFactorToFit(new Dimension(image.getWidth(), image.getHeight()), new Dimension(width, height)); int imageWidth = (int)Math.round(image.getWidth() * scaleFactor); int imageHeight = (int)Math.round(image.getHeight() * scaleFactor); double x = ((pageFormat.getImageableWidth() - imageWidth) / 2) + pageFormat.getImageableX(); double y = ((pageFormat.getImageableHeight() - imageHeight) / 2) + pageFormat.getImageableY(); cachedScaledImage = imageCopy.getScaledInstance(imageWidth, imageHeight, Image.SCALE_SMOOTH); } graphics2D.drawRenderedImage(cachedScaledImage, AffineTransform.getTranslateInstance(x, y)); return PAGE_EXISTS;}
