Java使用标签打印机打印到特定页面大小 [英] Java Printing to specific page size using label printer

问题描述

我正在尝试使用标签打印机（具体为EPSON TM-T88V）来吐出PNG图像。

I am trying to use a label printer (EPSON TM-T88V to be specific), to spit out PNG images.

我可以将它打印得很好，除了当我打印图像尺寸（220x175在72dpi再次具体）时，打印图像顶部有一沓白色空间，我认为这是浪费纸张。

I can get it to print fine, except when I am printing an image dimensions (220x175 at 72dpi to be specific again) there is a wad of white space on top of the image printed, which I think is a waste of paper.

关于如何最大限度地减少纸张浪费的任何想法？我希望它只打印图像，最小的空白然后剪切纸张。

Any ideas on how I can minimize the paper waste? I want it to print just the image, minimal whitespace and then cut the paper.

这是我的代码

    AttributeSet aset = new HashAttributeSet();
    aset.add(new PrinterName(printerName, null));
    /* locate a print service that can handle the request */
    PrintService[] services = PrintServiceLookup.lookupPrintServices(DocFlavor.INPUT_STREAM.PNG, aset);

    if (services.length >= 1) {
        /* create a print job for the chosen service */
        DocPrintJob pj = services[0].createPrintJob();

        DocAttributeSet das = new HashDocAttributeSet();
        das.add(PrintQuality.HIGH);
        das.add(MediaSizeName.ISO_A7); // I know the problem is here somewhere. This Media size seems to work best currently

        try {
            /* 
            * Create a Doc object to hold the print data.
            */
            Doc doc = new SimpleDoc(imageByteIs, DocFlavor.INPUT_STREAM.PNG, das);

            /* print the doc as specified */
            pj.print(doc, null);

        } catch (PrintException e) { 
            System.err.println(e);
        }
    }

推荐答案

你可以通过以下方式找到可用的纸张尺寸：

You can find the available paper sizes via:

PrintService printService = PrintServiceLookup.lookupDefaultPrintService();
Media[] res = (Media[]) printService.getSupportedAttributeValues(Media.class, null, null);
for (Media media : res) {
    if (media instanceof MediaSizeName) {
        MediaSizeName msn = (MediaSizeName) media;
        MediaSize ms = MediaSize.getMediaSizeForName(msn);
        float width = ms.getX(MediaSize.INCH);
        float height = ms.getY(MediaSize.INCH);
        System.out.println(media + ": width = " + width + "; height = " + height);
    }
}

找到最接近的可用MediaSizeName后适合您的纸张尺寸，只需将其添加到MediaSizeName.ISO_A7。

Once you've found the available MediaSizeName that most closely fits your paper size, simply add it in place of MediaSizeName.ISO_A7.

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