Question

public static void sendPdfToPrinter(String epsilon)
{
    FileInputStream psStream = null;
    try {
        psStream = new FileInputStream(epsilon);
        } catch (FileNotFoundException ffne) {
          ffne.printStackTrace();
        }
        if (psStream == null) {
            return;
        }
    DocFlavor psInFormat = DocFlavor.INPUT_STREAM.AUTOSENSE;
    Doc myDoc = new SimpleDoc(psStream, psInFormat, null);  
    PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
    PrintService[] services = PrintServiceLookup.lookupPrintServices(psInFormat, aset);

    // this step is necessary because I have several printers configured
    PrintService myPrinter = null;
    for (int i = 0; i < services.length; i++)
    {
        String svcName = services[i].toString();          
        System.out.println("service found: "+ svcName); 
        if (svcName.contains("series"))
        {
            myPrinter = services[i];
            System.out.println("my printer found: "+svcName);
            break;
        }
    }

    if (myPrinter != null) {            
        DocPrintJob job = myPrinter.createPrintJob();
        try {
        job.print(myDoc, aset);

        } catch (Exception pe) {pe.printStackTrace();}
    } else {
        System.out.println("no printer services found");
    }
}

public static void main(String[] args) throws IOException
{
    //@SuppressWarnings("unused")
    //Testing t = new Testing();
    String DEST = ("C:/Users/Brian/Desktop/SO046201R-17/TestingAlpha/6FS-2m.pdf");
    sendPdfToPrinter(DEST);
}

我正在编写一个程序，它将文本写入一系列PDF文件，然后将它们发送到打印机。我已经完成了PDF部分的写作，但每当我尝试将文件传递给“sendPdfToPrinter”方法时，我都会遇到问题。到目前为止，我已经测试了HP Deskjet打印机和Canon Inkjet打印机没有成功（前者发出“Java Document error”消息，后者不会将文件添加到队列中）。我想我的问题归结为：

代码或我正在使用的打印机有问题吗？有解决方法吗？

使用Mark的编辑：

public static void sendPdfToPrinter(String epsilon) throws 
InvalidPasswordException, IOException
{
    FileInputStream psStream = null;
    try {
        psStream = new FileInputStream(epsilon);
        } catch (FileNotFoundException ffne) {
          ffne.printStackTrace();
        }
        if (psStream == null) {
            return;
        }
    DocFlavor psInFormat = DocFlavor.INPUT_STREAM.AUTOSENSE;
    PDDocument myDoc = PDDocument.load(new File(epsilon));  
    PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
    PrintService[] services = 
    PrintServiceLookup.lookupPrintServices(psInFormat, aset);

    // this step is necessary because I have several printers configured
    PrintService myPrinter = null;
    for (int i = 0; i < services.length; i++)
    {
        String svcName = services[i].toString();          
        System.out.println("service found: "+ svcName); 
        if (svcName.contains("series"))
        {
            myPrinter = services[i];
            System.out.println("my printer found: "+svcName);
            break;
        }
    }

    if (myPrinter != null) {            
        PrinterJob job = PrinterJob.getPrinterJob();

        try {
            job.setPrintService(myPrinter);
            job.setPageable(new PDFPageable(myDoc));
            job.print();
        } catch (PrinterException e) {
            // Handle the exception.
        }
    } else {
        System.out.println("no printer services found");
    }

}

Answer 1

这可能是因为您的打印机本身不支持PDF。我实际上设法用您的代码打印PDF，但它打印出来就像将PDF文件作为文本文件打开一样。

一种解决方案是使用Apache的Java PDF库：PDFBox。该文件可以这样加载：

PDDocument myDoc = PDDocument.load(new File(epsilon));

要打印文件，请使用PrinterJob代替DocPrintJob：

PrinterJob job = PrinterJob.getPrinterJob();

try {
    job.setPrintService(myPrinter);
    job.setPageable(new PDFPageable(myDoc));
    job.print();
} catch (PrinterException e) {
    // Handle the exception.
}

有没有办法让这种“发送到打印机”的Java方法起作用？

1 个答案: