java - 如何将字节数组数据打印到Zebra打印机？

Question

我想打印 PDF 文件到 Zebra printer使用 Java 应用程序。我已经使用 Jasper reports 生成了 PDF带有二维条形码。如果我在 Zebra 打印机上执行手动打印，它会打印该 PDF 文件，但是当我尝试使用 Java 应用程序打印相同的 pdf 文件时，作业会提交到打印机，但不会进行打印。

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

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 ZebraPrintUtil {
    public static void main(String[] args) throws IOException, InterruptedException {
        byte[] content = convertFileToBytes("D://old files/test123.pdf");
        print(content, "ZDesigner GX420t");
    }

    private static byte[] convertFileToBytes(String absoluteFilePath) throws IOException {
        File file = new File(absoluteFilePath);
        FileInputStream fis = new FileInputStream(file);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        byte[] buf = new byte[1024];

        try {
            for (int readNum;
            (readNum = fis.read(buf)) != -1;) {
                bos.write(buf, 0, readNum); // no doubt here is 0
            }
        } catch (IOException ex) {

        } finally {
            if (fis != null) {
                fis.close();
            }
        }

        byte[] bytes = bos.toByteArray();
        return bytes;
    }

    private static boolean print(byte[] byteArray, String reqPrinterId)
            throws IOException, InterruptedException {
        boolean isPrintedSuccessfully = false;
        DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE;
        PrintService[] services = PrintServiceLookup.lookupPrintServices(
        flavor, null);

        if (services.length > 0) {
            PrintService myService = null;

            for (PrintService service: services) {
                if (service.getName().contains(reqPrinterId)) {
                    myService = service;
                    break;
                }
            }

            DocPrintJob printJob = myService.createPrintJob();
            JobCompleteMonitor monitor = new JobCompleteMonitor();
            printJob.addPrintJobListener(monitor);
            Doc document = new SimpleDoc(byteArray, flavor, null);

            try {
                printJob.print(document, null);
                monitor.waitForJobCompletion();
                System.out.println("-------------------- Print Completed " + monitor.completed);

                isPrintedSuccessfully = true;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        return isPrintedSuccessfully;
    }

    private static class JobCompleteMonitor extends PrintJobAdapter {
        private boolean completed = false;

        @Override
        public void printJobCanceled(PrintJobEvent pje) {
            signalCompletion();
        }

        @Override
        public void printJobCompleted(PrintJobEvent pje) {
            signalCompletion();
        }

        @Override
        public void printJobFailed(PrintJobEvent pje) {
            signalCompletion();
        }

        @Override
        public void printJobNoMoreEvents(PrintJobEvent pje) {
            signalCompletion();
        }

        private void signalCompletion() {
            synchronized(JobCompleteMonitor.this) {
                completed = true;
                JobCompleteMonitor.this.notify();
            }
        }

        public synchronized void waitForJobCompletion() {
            try {
                while (!completed) {
                    wait();
                }
            } catch (InterruptedException e) {

            }
        }
    }
}

Answer 1

对于Desktop集成:

File file = ...
if (Desktop.isDesktopAvailable()) {
    Desktop.getDesktop().print(file);
}