JavaFX - 以编程方式设置目标路径以将节点直接打印到pdf文件 [英] JavaFX - set programmatically the destination path to print directly a node to pdf file

问题描述

我想使用Microsoft Print to PDF打印机将节点打印到pdf文件。假设已经提取了Printer对象，我有下一个功能正常工作。

I want to print a node to a pdf file using "Microsoft Print to PDF" printer. Supposing that the Printer object is already extracted I have the next function which is working perfectly.

public static void printToPDF(Printer printer, Node node) {

    PrinterJob job = PrinterJob.createPrinterJob(printer);
    if (job != null) {
        job.getJobSettings().setPrintQuality(PrintQuality.HIGH);

        PageLayout pageLayout = job.getPrinter().createPageLayout(Paper.A4, PageOrientation.PORTRAIT,
                Printer.MarginType.HARDWARE_MINIMUM);

        boolean printed = job.printPage(pageLayout, node);
        if (printed) {
            job.endJob();
        } else {
            System.out.println("Printing failed.");
        }
    } else {
        System.out.println("Could not create a printer job.");
    }
}

我在这里唯一的问题是，弹出对话框并询问目标路径以保存pdf。我一直在努力寻找以编程方式设置路径的解决方案，但没有成功。有什么建议？提前谢谢你。

The only issue that I have here, is that a dialog box is popping up and asking for a destination path to save the pdf. I was struggling to find a solution to set the path programmatically, but with no success. Any suggestions? Thank you in advance.

推荐答案

经过一些研究，我带来了一个丑陋的黑客。我从PrinterJob访问了jobImpl私有字段，并从中获取了属性。因此，我插入了目标属性，显然它正在按要求工作。我知道这不好，但......有点可行。如果您有任何更好的建议，请不要犹豫发布。

After some more research I came with an ugly hack. I accessed jobImpl private field from PrinterJob, and I took attributes out of it. Therefore I inserted the destination attribute, and apparently it is working as requested. I know it is not nice, but ... is kind of workable. If you have any nicer suggestion, please do not hesitate to post them.

         try {
            java.lang.reflect.Field field = job.getClass().getDeclaredField("jobImpl");
            field.setAccessible(true);
            PrinterJobImpl jobImpl = (PrinterJobImpl) field.get(job);
            field.setAccessible(false);

            field = jobImpl.getClass().getDeclaredField("printReqAttrSet");
            field.setAccessible(true);
            PrintRequestAttributeSet printReqAttrSet = (PrintRequestAttributeSet) field.get(jobImpl);
            field.setAccessible(false);

            printReqAttrSet.add(new Destination(new java.net.URI("file:/C:/deleteMe/wtv.pdf")));
        } catch (Exception e) {
            System.err.println(e);
        }

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