无法指定正确的打印尺寸

Question

我们最近购买了一台brother QL-700 打印机，我们正在通过这台机器进行一些不干胶打印。

我们输入的纸张是62mm-wide sticker roll，没有“长度”限制。

问题是，无论我怎么做（我尝试过Book、PrintRequestAttributeSet），我都无法使用 Java 告诉打印机对话框窗口为打印机使用正确的纸张尺寸。例如，我无法按照我们的需要制作出精确的 62mm × 40mm。它总是像这样“捕捉”到最近的纸张：

这里是有问题的代码：

PrinterJob job = PrinterJob.getPrinterJob();
PageFormat pf = job.defaultPage();
Paper p = pf.getPaper();
p.setSize(UnitConv.mm2pt(62), UnitConv.mm2pt(40));
p.setImageableArea(0, 0, UnitConv.mm2pt(62), UnitConv.mm2pt(40));
pf.setPaper(p);
pf.setOrientation(PageFormat.LANDSCAPE);

job.setPrintable(this, pf);

if (job.printDialog()) {
    try {
        job.print();
    } catch (Exception PrintException) {
        PrintException.printStackTrace();
    }
}

我可以确认打印机可以打印任意长度，如下图所示（使用 Brother 的 P-touch 编辑器）。注意虽然是可调的，但是36mm是软件自己预设的：

所以问题：

如何强制纸张的“length”精确到40mm？

相关： custom paper size for labelprinter (Brother QL 570)

编辑

我进行了媒体尺寸查询 (code)，这是它可以支持的媒体列表：

17 mm x 54 mm: width = 0.67; height = 2.12
17 mm x 87 mm: width = 0.67; height = 3.42
23 mm x 23 mm: width = 0.9066535; height = 0.9066535
iso-b10: width = 1.2204725; height = 1.7322835
29 mm x 90 mm: width = 1.14; height = 3.5366535
38 mm x 90 mm: width = 1.4966536; height = 3.5366535
39 mm x 48 mm: width = 1.5366535; height = 1.8833464
52 mm x 29 mm: width = 1.1366535; height = 2.0466535
iso-b8: width = 2.440945; height = 3.464567
62 mm x 29 mm: width = 1.1366535; height = 2.44
62 mm x 100 mm: width = 2.44; height = 3.93
12 mm Dia: width = 0.47334644; height = 0.47334644
23 mm x 23 mm: width = 0.9066535; height = 0.9066535
58 mm Dia: width = 2.2933464; height = 2.2933464
12 mm: width = 0.47334644; height = 3.9366536
29 mm: width = 1.14; height = 3.9366536
38 mm: width = 1.4966536; height = 3.9366536
50 mm: width = 1.9666536; height = 3.9366536
54 mm: width = 2.1266534; height = 3.9366536
62 mm x 100 mm: width = 2.44; height = 3.93
12 mm x2: width = 0.82665354; height = 3.9366536
54 mm: width = 2.1266534; height = 3.9366536
38 mm x2: width = 2.8733466; height = 3.9366536
50 mm x2: width = 3.8133464; height = 3.9366536
54 mm x2: width = 3.9366536; height = 4.0933466
62 mm x2: width = 3.9366536; height = 4.76
29 mm: width = 1.14; height = 3.9366536
29 mm x3: width = 3.18; height = 3.9366536
38 mm x3: width = 3.9366536; height = 4.25
50 mm x3: width = 3.9366536; height = 5.66
54 mm x3: width = 3.9366536; height = 6.06
62 mm x3: width = 3.9366536; height = 7.08
38 mm: width = 1.4966536; height = 3.9366536
29 mm x4: width = 3.9366536; height = 4.2
38 mm x4: width = 3.9366536; height = 5.6266537
50 mm x4: width = 3.9366536; height = 7.5066533
54 mm x4: width = 3.9366536; height = 8.026653
62 mm x4: width = 3.9366536; height = 9.4
29 mm x 90 mm: width = 1.14; height = 3.5366535
38 mm x 90 mm: width = 1.4966536; height = 3.5366535
Small Address Label: width = 1.1366535; height = 2.44
17 mm x 54 mm: width = 0.67; height = 2.12
62 mm x 100 mm: width = 2.44; height = 3.93
62 mm x 100 mm: width = 2.44; height = 3.93
17 mm x 87 mm: width = 0.67; height = 3.42
17 mm x 54 mm: width = 0.67; height = 2.12
Binder 3 cm - Spine: width = 1.14; height = 8.226653
Binder 5 cm - Spine: width = 2.44; height = 8.226653
58 mm Dia: width = 2.2933464; height = 2.2933464
12 mm Dia: width = 0.47334644; height = 0.47334644
23 mm x 23 mm: width = 0.9066535; height = 0.9066535
23 mm x 23 mm: width = 0.9066535; height = 0.9066535
62 mm x 184 mm Postage Label: width = 2.44; height = 7.24
Binder 5 cm - Spine: width = 2.44; height = 8.226653

编辑（2017 年 4 月）

只是为了更新这个问题的状态。最后我通过python和一个开源实用程序brother_ql解决了它，它直接将作业发送到usb端口，甚至没有使用兄弟提供的固件。它工作得很好，解决了我的问题。

Answer 1

没有比here 更好的回答方式了

那么也不要混淆height和length和width，java中的paper类取的是width和height而不是length

 public void setSize(double width, double height) {
    mWidth = width;
    mHeight = height;

你可能也想考虑这个

   /**
 * Sets the imageable area of this <code>Paper</code>.  The
 * imageable area is the area on the page in which printing
 * occurs.
 * @param x the X coordinate to which to set the
 * upper-left corner of the imageable area of this <code>Paper</code>
 * @param y the Y coordinate to which to set the
 * upper-left corner of the imageable area of this <code>Paper</code>
 * @param width the value to which to set the width of the
 * imageable area of this <code>Paper</code>
 * @param height the value to which to set the height of the
 * imageable area of this <code>Paper</code>
 */
public void setImageableArea(double x, double y,
                             double width, double height) {
    mImageableArea = new Rectangle2D.Double(x, y, width,height);
}

这些只是纸质类中的一些方法，当涉及到实现时，您可能想看看更多参数.. 希望对你有帮助:)

Answer 2

我已经多次看到Paper setSize 传递的参数包含像素大小。您可以尝试像这样将mm2pt 更改为mm2px 吗？

PrinterJob job = PrinterJob.getPrinterJob();
PageFormat pf = job.defaultPage();
Paper p = pf.getPaper();
int resolution = 72; // dpi
p.setSize(UnitConv.mm2px(62, resolution), UnitConv.mm2px(40, resolution));
p.setImageableArea(0, 0, UnitConv.mm2px(62, resolution), UnitConv.mm2px(40, resolution));
pf.setPaper(p);
pf.setOrientation(PageFormat.LANDSCAPE);

job.setPrintable(this, pf);

if (job.printDialog()) {
    try {
        job.print();
    } catch (Exception PrintException) {
        PrintException.printStackTrace();
    }
}

Answer 3

您可能需要在提交printjob request 时使用PrintRequestAttribute。如果自定义打印介质尺寸不起作用，您可能希望使用通过query code 发现的介质尺寸并在请求属性集中选择最合适的一个。

@Test
public void testMyPrinteService() {
    // select default or specific one here
    PrintService printService = PrintServiceLookup.lookupDefaultPrintService();

    PrinterJob job = PrinterJob.getPrinterJob();

    PageFormat pf = job.defaultPage();
    Paper p = pf.getPaper();
    p.setSize(UnitConv.mm2pt(62), UnitConv.mm2pt(40));
    p.setImageableArea(0, 0, UnitConv.mm2pt(62), UnitConv.mm2pt(40));
    pf.setPaper(p);
    pf.setOrientation(PageFormat.LANDSCAPE);

    Printable myPrintable = null ;//some printable new MyPrintable(1); 
    PrintRequestAttributeSet printReqAttrs = new HashPrintRequestAttributeSet();
    PrintRequestAttribute jobPrinArea = new MediaPrintableArea(0, 0, 64, 40, MediaPrintableArea.MM);
    printReqAttrs.add(jobPrinArea);

    if (job.printDialog(printReqAttrs)) {
        try {
            job.setPrintable(myPrintable, pf);
            job.setPrintService(printService);
            //pass specific attributes to printer
            job.print(printReqAttrs);
        } catch (Exception PrintException) {
            PrintException.printStackTrace();
        }
    }
}

希望这会有所帮助。

Answer 4

使用自定义 java.awt.print.Paper 不适用于 Brother QL 标签打印机。

我已经为QL-720NW 找到了一个解决方案，它的型号几乎相同，只是带有 WiFi 和以太网。 请注意，它应该适用于所有 Brother 标签打印机。

首先，您需要使用驱动程序添加自定义连续磁带格式。在 Windows 中，它位于：

打印机首选项 > 高级选项卡 > 连续磁带格式 > 设置

Printer Settings

List of Custom Paper Sizes

Add Custom Paper

之后，您应该按照您选择的名称（例如“自定义纸张”）找到介质并通过 javax.print API 打印：

// Lookup printer by name 
PrintService[] foundPrinters = PrintServiceLookup.lookupPrintServices(null, new HashAttributeSet(new PrinterName("QL-720NW", null)));
PrintService printer = foundPrinters[0];

// Lookup custom paper by name
MediaSizeName paper = null;
for (Media m : (Media[])printer.getSupportedAttributeValues(Media.class, null, null))
{
    if (m instanceof MediaSizeName)
    {
        MediaSizeName media = ((MediaSizeName)m);
        if ("Custom paper".equals(media.toString())) paper = media;
    }
}

// Create a new printable object
Printable p = ...; // Create a printable object
Doc doc = new SimpleDoc(p, DocFlavor.SERVICE_FORMATTED.PRINTABLE, null);

// Set custom paper as request attribute
PrintRequestAttributeSet attrs = new HashPrintRequestAttributeSet();
attrs.add(paper);

// Create a new print job and print it
DocPrintJob job = printer.createPrintJob();
try
{
    job.print(doc, attrs);
}
catch (PrintException ex)
{
    ex.printStackTrace();
}

Answer 5

我找到了适合我的解决方案。调用 printDialog() 后，您不能在 PrintJob 上设置打印 ()，但使用包装在 Book 对象中的 Printable 的 setPageable() 可以工作。第一个验证传递的 PageFormat 并选择另一个。