java print api - 以 300dpi 打印 JComponent

发布于 2024-07-26 15:37:28 字数 1498 浏览 2 评论 0原文

如果我做错了什么，请告诉我。我想将条形码打印到标签上，因此我需要这些条形码的高质量打印输出，因此我推动打印机以 300dpi 进行打印。我所做的：

制作了一个大的 JFrame；宽度：2490px，高度：3515px，因此它代表1:1尺寸的A4纸（如果打印为300dpi，则这是A4纸分辨率）
在该 JFrame 的 contentPane 上绘制 40 个条形码图像
设置打印属性，以便以 300dpi 打印：

PrintRequestAttributeSet aset = 新的 HashPrintRequestAttributeSet();

  PrinterResolution pr = 
    new PrinterResolution(300,300,PrinterResolution.DPI);
   MediaPrintableArea mpa=new MediaPrintableArea(8,21,
         210-16, 296-42, MediaPrintableArea.MM);

属性集填充了以下数据：

aset.add( mpa  ); 
aset.add( pr );
aset.add( MediaSizeName.ISO_A4 );
aset.add( new Copies(1) );
aset.add(OrientationRequested.PORTRAIT );
aset.add(PrintQuality.HIGH);
aset.add( Fidelity.FIDELITY_TRUE );

printJob.setPrintable(this);
printJob.print(aset);

此类有打印方法：

 public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
    if (pageIndex > 0) {
      return(NO_SUCH_PAGE);
    } else {
      Graphics2D g2d = (Graphics2D)g;

      g2d.translate(pageFormat.getImageableX(),pageFormat.getImageableY());
      disableDoubleBuffering(componentToBePrinted);

      componentToBePrinted.paint(g2d);
      enableDoubleBuffering(componentToBePrinted);
      return(PAGE_EXISTS);
    }

我需要在那张 A4 纸上有 40 个条形码，每个尺寸为 48.5 毫米 x 25.4 毫米。打印在纸上的是6个条形码，每个条形码的尺寸为104mm x 46mm（即宽度几乎是页面宽度的一半），占满了整张纸。

任何想法，我能做错什么？

原文

please tell me if I am doing something wrong. I want to print barcodes onto labels, so I need high quality printout for these barcodes so I am pushing printer to print in 300dpi. What I've done:

made a big JFrame; width: 2490px, height: 3515px so it represents A4 paper in 1:1 measure (this is A4 paper resolution if print is to be 300dpi)
draw 40 barcode images onto contentPane of that JFrame
setup print attributes so it will print in 300dpi:

PrintRequestAttributeSet aset =
new HashPrintRequestAttributeSet();

  PrinterResolution pr = 
    new PrinterResolution(300,300,PrinterResolution.DPI);
   MediaPrintableArea mpa=new MediaPrintableArea(8,21,
         210-16, 296-42, MediaPrintableArea.MM);

attribute set is filled with this data:

aset.add( mpa  ); 
aset.add( pr );
aset.add( MediaSizeName.ISO_A4 );
aset.add( new Copies(1) );
aset.add(OrientationRequested.PORTRAIT );
aset.add(PrintQuality.HIGH);
aset.add( Fidelity.FIDELITY_TRUE );

printJob.setPrintable(this);
printJob.print(aset);

this class has print method:

 public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
    if (pageIndex > 0) {
      return(NO_SUCH_PAGE);
    } else {
      Graphics2D g2d = (Graphics2D)g;

      g2d.translate(pageFormat.getImageableX(),pageFormat.getImageableY());
      disableDoubleBuffering(componentToBePrinted);

      componentToBePrinted.paint(g2d);
      enableDoubleBuffering(componentToBePrinted);
      return(PAGE_EXISTS);
    }

I need to have 40 barcodes on that A4 sheet, each in size 48.5mm x 25.4mm.
What is printed out on paper is 6 barcodes each doubled in size of 104mm x 46mm (that is in width almost half of page's width) which fulfilled whole paper.

Any idea, what can I do wrong?

分享到QQ

分享到微博