在java中打印具有实际大小的图像 [英] print a image with actual size in java

问题描述

我有一张照片，我想在纸上以实际尺寸打印并在代码下方实现，但我不知道为什么这段代码缩放图片但我希望图片保持其大小，请你帮我？

well i have a picture and i want to print it in exactly actual size on paper and implemented below code but i don't know why this code zooms the picture but i want picture to keep its size , could you please help me ?

非常感谢...

    final Image img = new ImageIcon("C:\\check.jpg").getImage();
    PrinterJob printJob = PrinterJob.getPrinterJob();
    printJob.setPrintable(new Printable()
    {
        public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {
            if (pageIndex != 0) {
                return NO_SUCH_PAGE;
            }
            graphics.drawImage(img, 0, 0, img.getWidth(null), img.getHeight(null),   null);
            return PAGE_EXISTS;
        }
    });
    if (printJob.printDialog()) {
        try {
            printJob.print();
        } catch (Exception prt) {
            System.err.println(prt.getMessage());
        }
    }

推荐答案

那可能是因为您的图像没有正确的分辨率。谷歌每英寸点数或图像分辨率，然后看一下 PageFormat ，显然使用72 dpi的分辨率。现在您应该有足够的信息来正确缩放图像。

That is probably because your image does not have the correct resolution. Google "dots per inch" or "image resolution," then take a look at the javadoc for PageFormat which obviously uses a resolution of 72 dpi. Now you should have enough information to scale your image correctly.

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