用Java取消打印作业

 import java.awt.print.PrinterAbortException;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import javax.print.CancelablePrintJob;
import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintException;
import javax.print.SimpleDoc;
import javax.print.StreamPrintService;
import javax.print.StreamPrintServiceFactory;
import javax.print.event.PrintJobAdapter;
import javax.print.event.PrintJobEvent;
public class Main {
  public static void main(String[] argv) throws Exception {
    try {
      OutputStream fos = new BufferedOutputStream(new FileOutputStream("filename.ps"));
      DocFlavor flavor = DocFlavor.INPUT_STREAM.GIF;
      InputStream is = new BufferedInputStream(new FileInputStream("filename.gif"));
      StreamPrintServiceFactory[] factories = StreamPrintServiceFactory
          .lookupStreamPrintServiceFactories(flavor, DocFlavor.BYTE_ARRAY.POSTSCRIPT.getMimeType());
      StreamPrintService service = factories[0].getPrintService(fos);
      final DocPrintJob job = service.createPrintJob();
      Doc doc = new SimpleDoc(is, flavor, null);
      PrintJobWatcher pjDone = new PrintJobWatcher(job);