使用Java打印PDF文件

Question

使用Java打印PDF文件

4

我想使用Java打印文档，但程序执行成功后，我的打印机没有打印任何东西。为什么会这样？您有解决方案吗？如果我的打印机不支持PDF格式，是否有办法打印PDF文件或DOCX文件？

package useprintingserviceinjava;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.InputStream;

import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.SimpleDoc;
import javax.print.event.PrintJobAdapter;
import javax.print.event.PrintJobEvent;
public class UsePrintingServiceInJava {

    private static boolean jobRunning = true;

    public static void main(String[] args) throws Exception {


  InputStream is;
   is = new BufferedInputStream(new FileInputStream("PAPER_SENSOR.pdf"));

  DocFlavor flavor = DocFlavor.INPUT_STREAM.PDF;

  PrintService service = PrintServiceLookup.lookupDefaultPrintService();

  DocPrintJob printJob = service.createPrintJob();

  printJob.addPrintJobListener(new JobCompleteMonitor());

  Doc doc = new SimpleDoc(is, DocFlavor.INPUT_STREAM.AUTOSENSE, null);

  printJob.print(doc, null);

  while (jobRunning) {
        Thread.sleep(1000);
  }

  System.out.println("Exiting app");

  is.close();

    }

    private static class JobCompleteMonitor extends PrintJobAdapter {
        @Override
        public void printJobCompleted(PrintJobEvent jobEvent) {
            System.out.println("Job completed");
            jobRunning = false;
        }
    }

}

这是我研究的代码，但仍然无法打印。下面是另一个基于我的研究的代码：

package javaapplication24;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.InputStream;

import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.SimpleDoc;
import javax.print.event.PrintJobEvent;
import javax.print.event.PrintJobListener;
public class HandlePrintJobEvents {

public static void main(String[] args) throws Exception {

        // create a PDF doc flavor
        try ( // Open the image file
                InputStream is = new BufferedInputStream(new FileInputStream("C:\\Users\\JUSTINE\\Documents\\thesis document\\PAPER_SENSOR.pdf"))) {
            // create a PDF doc flavor

            DocFlavor flavor = DocFlavor.INPUT_STREAM.PDF;

            // Locate the default print service for this environment.

            PrintService service = PrintServiceLookup.lookupDefaultPrintService();

            // Create and return a PrintJob capable of handling data from

            // any of the supported document flavors.

            DocPrintJob printJob = service.createPrintJob();

            // register a listener to get notified when the job is complete

            printJob.addPrintJobListener(new PrintJobMonitor());

            // Construct a SimpleDoc with the specified

            // print data, doc flavor and doc attribute set.

            Doc doc = new SimpleDoc(is, DocFlavor.INPUT_STREAM.AUTOSENSE, null);

            // Print a document with the specified job attributes.

            printJob.print(doc, null);
        }

}

private static class PrintJobMonitor implements PrintJobListener {

    @Override
    public void printDataTransferCompleted(PrintJobEvent pje) {
        // Called to notify the client that data has been successfully
        // transferred to the print service, and the client may free
        // local resources allocated for that data.
    }

    @Override
    public void printJobCanceled(PrintJobEvent pje) {
        // Called to notify the client that the job was canceled
        // by a user or a program.
    }

    @Override
    public void printJobCompleted(PrintJobEvent pje) {
        // Called to notify the client that the job completed successfully.
    }

    @Override
    public void printJobFailed(PrintJobEvent pje) {
        // Called to notify the client that the job failed to complete
        // successfully and will have to be resubmitted.
    }

    @Override
    public void printJobNoMoreEvents(PrintJobEvent pje) {
        // Called to notify the client that no more events will be delivered.
    }

    @Override
    public void printJobRequiresAttention(PrintJobEvent pje) {
        // Called to notify the client that an error has occurred that the
        // user might be able to fix.
    }

}

谢谢 :) *我已经尝试了两台打印机，但仍无法打印。

- JustOnce

默认打印机：佳能iP2700系列，这是输出。 - JustOnce

添加以下代码是否有帮助？

PrintRequestAttributeSet params = new HashPrintRequestAttributeSet();
params.add(new Copies(1));

这将设置SimpleDoc的参数（因此请使用params替换null）。 - pietv8x

对不起，是我的错。我应该让你保留SimpleDoc的_parameter_参数，但将print方法的_parameter_参数更改为params。 - pietv8x

还是不行 :( 它只是在运行，但什么也没有发生。你觉得这是因为我的打印机吗？ - JustOnce

不，我没有。你正在运行上面哪个代码块？ - pietv8x

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1个回答

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- pietv8x · Accepted Answer

我刚在我的地方检查了你的代码。我没有打印机，所以无法打印，但是我可以将某些内容添加到打印队列中而不实际打印（它只是无限地开始搜索打印机）。

特别是因为你说你遇到了sun.print.PrintJobFlavorException异常，这似乎说明你的打印机确实不支持PDF打印。要验证这一点，请尝试以下操作：

    PrintService service = PrintServiceLookup.lookupDefaultPrintService();
    int count = 0;
    for (DocFlavor docFlavor : service.getSupportedDocFlavors()) {
        if (docFlavor.toString().contains("pdf")) {
            count++;
        }
    }
    if (count == 0) {
        System.err.println("PDF not supported by printer: " + service.getName());
        System.exit(1);
    } else {
        System.out.println("PDF is supported by printer: " + service.getName());
    }

编辑:

我使用的是兄弟DCP-J552DW打印机。以下代码对我非常有效，除了一些页面边距（当然可以调整）：

public static void main(String[] args) throws IOException {
    FileInputStream in = new FileInputStream("test.pdf");
    Doc doc = new SimpleDoc(in, DocFlavor.INPUT_STREAM.AUTOSENSE, null);
    PrintService service = PrintServiceLookup.lookupDefaultPrintService();

    try {
        service.createPrintJob().print(doc, null);
    } catch (PrintException e) {
        e.printStackTrace();
    }
}

打印机没有立即响应，建立连接大约需要20秒钟。