Java 使用标签打印机打印到特定页面大小
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Java Printing to specific page size using label printer
提问by alwinc
I am trying to use a label printer (EPSON TM-T88V to be specific), to spit out PNG images.
我正在尝试使用标签打印机（具体是 EPSON TM-T88V）来吐出 PNG 图像。
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.
我可以让它打印得很好，除非我打印图像尺寸（220x175 72dpi 再次具体）打印的图像顶部有一团空白，我认为这是浪费纸张。
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.
关于如何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，然后剪纸。
Here is my code
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);
}
}
回答by Some Java Programmer
You can find the available paper sizes via:
您可以通过以下方式找到可用的纸张尺寸：
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);
}
}
Once you've found the available MediaSizeName that most closely fits your paper size, simply add it in place of MediaSizeName.ISO_A7.
找到最适合您的纸张尺寸的可用 MediaSizeName 后，只需将其添加到 MediaSizeName.ISO_A7 的位置。
回答by Joop Eggen
Add a MediaPrintableArea:
添加一个MediaPrintableArea：
das.add(new MediaPrintableArea(0.05, 0.05, 0.05, 0.05, MediaPrintableArea.INCH));
回答by Lai
This is the settings I use for printing on A4 paper with 10mm margin.
这是我用于在 A4 纸上打印 10 毫米边距的设置。
int width = Math.round(MediaSize.ISO.A4.getX(MediaSize.MM));
int height = Math.round(MediaSize.ISO.A4.getY(MediaSize.MM));
das.add(new MediaPrintableArea(10, 10, width-20, height-20, MediaPrintableArea.MM));
