我正在尝试打印我的Jpanel。我大部分时间都在工作。现在，我正在尝试自定义一些内容，例如边距。
这是我的代码
PrinterJob pjob = PrinterJob.getPrinterJob();
//*
PageFormat pf0 = pjob.defaultPage();
Paper p = pf0.getPaper();
//hardcode the page imageable area for testing. The sizes are valid ones i pulled from calling printerJob.getDialog(attr)...)
p.setImageableArea(28, 28, 556, 734);
pf0.setPaper(p);
//set the attributes for the formatter
PrintRequestAttributeSet attr_set = new HashPrintRequestAttributeSet();
attr_set.add(Fidelity.FIDELITY_TRUE);
attr_set.add(PrintQuality.HIGH);
attr_set.add(PrintQuality.HIGH);
attr_set.add(OrientationRequested.LANDSCAPE);
//set the printable area
int width = Math.round(MediaSize.NA.LETTER.getX(MediaSize.MM));
int height = Math.round(MediaSize.NA.LETTER.getY(MediaSize.MM));
attr_set.add(new MediaPrintableArea(10, 10, width - 20, height - 20, MediaPrintableArea.MM));
//update the page formatter
pf0 = pjob.getPageFormat(attr_set);
即使我正在调用
pf0.setPaper(p)，在pf0（页面格式化程序）中的纸张对象也不会更新。这是调试器的屏幕，显示该值未更改。是什么赋予了？
最佳答案
好吧，所以我玩了这个。因此，使用您的示例，我得到...
// Paper.setImageableArea
28 pixels = 0.99 cm (x)
28 pixels = 0.99 cm (y)
556 pixels = 19.653 cm (width)
734 pixels = 25.945 cm (height)
// PrintRequestAttributeSet
29.528 pixels = 1 cm (x)
29.528 pixels = 1 cm (y)
578.74 pixels = 19.6 cm (width)
764.764 pixels = 25.9 cm (height)
// Page format AFTER getting it from the PrintJob
72 pixels = 2.545 cm (x)
72 pixels = 2.545 cm (y)
697.918 pixels = 24.669 cm (width)
451.332 pixels = 15.953 cm (height)
显然，这不是您的期望。
接下来，我在
attr_set.add(MediaSizeName.NA_LETTER);中添加了PrintRequestAttributeSet// Page format AFTER getting it from the PrintJob
22.082 pixels = 0.781 cm (x)
72 pixels = 2.545 cm (y)
697.918 pixels = 24.669 cm (width)
451.332 pixels = 15.953 cm (height)
仍然不是您所期望的...
现在，如果我使用
pf0 = pjob.pageDialog(attr_set);而不是pf0 = pjob.getPageFormat(attr_set);// Page format AFTER getting it from the PrintJob
30 pixels = 1.06 cm (x)
28 pixels = 0.99 cm (y)
734 pixels = 25.945 cm (width)
556 pixels = 19.653 cm (height)
这几乎就是您要设置的内容（请注意，由于页面处于横向状态，宽度和高度已交换）...
所以... bug ...欢迎来到WHY的美好世界??！？！
经过一番挖掘之后，我发现
MediaPrintableArea被忽略了，并且在某些情况下是由于调用service.isAttributeValueSupported(orientReq, null, attributes)的原因，其中service是PrintService。这可能与默认打印机有关……？