java - 使用 DocPrintJob (Java) 进行双面打印

Question

我有两个字节 []，一个用于前面，另一个用于后面。我想用那些 2 字节数组打印一张双面卡片。我的代码如下所示：-

    private void print(byte[] frontSideByte, byte[] backSideByte) {
        PrintService printService = getPritnerService();
                
        DocFlavor flavor = DocFlavor.BYTE_ARRAY.PNG;
        DocPrintJob job = printService.createPrintJob();
        
        DocAttributeSet das = new HashDocAttributeSet();

        das.add(Sides.DUPLEX);
        das.add(new PrinterResolution(300, 300, PrinterResolution.DPI));
        das.add(new MediaPrintableArea(0.0f, 0, 53.98f*2, 85.6f*2, MediaPrintableArea.MM));

        das.add(findOrientation(frontSideByte));
        
        Doc doc = new SimpleDoc(frontSideByte, flavor, das);
        try {
            job.print(doc, null);
        } catch (Exception ex) {
            System.out.println(ex);
        }
    }