java経由でプリンターに印刷するドキュメントを送信する際に多くの問題が発生しました。エラーメッセージなどが表示されず、キューに印刷ジョブが表示されますが、何も印刷されません。プリンタードライバーなどを再インストールしました。しかし、運が悪かったのですが、これまでのところ、1つのコードが完全に機能し、ドキュメントを送信して正常に印刷できることだけが運が良かったのです。
以下は動作するJavaコードです：
import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.print.*;
import java.text.*;
/**
* The PrintText application expands on the
* PrintExample application in that it images
* text on to the single page printed.
*/
public class PrintText implements Printable {
/**
* The text to be printed.
*/
private static final String mText =
"Four score and seven years ago our fathers brought forth on this "
+ "continent a new nation, conceived in liberty and dedicated to the "
+ "proposition that all men are created equal. Now we are engaged in "
+ "a great civil war, testing whether that nation or any nation so "
+ "conceived and so dedicated can long endure. We are met on a great "
+ "battlefield of that war. We have come to dedicate a portion of "
+ "that field as a final resting-place for those who here gave their "
+ "lives that that nation might live. It is altogether fitting and "
+ "proper that we should do this. But in a larger sense, we cannot "
+ "dedicate, we cannot consecrate, we cannot hallow this ground."
+ "The brave men, living and dead who struggled here have consecrated "
+ "it far above our poor power to add or detract. The world will "
+ "little note nor long remember what we say here, but it can never "
+ "forget what they did here. It is for us the living rather to be "
+ "dedicated here to the unfinished work which they who fought here "
+ "have thus far so nobly advanced. It is rather for us to be here "
+ "dedicated to the great task remaining before us--that from these "
+ "honored dead we take increased devotion to that cause for which "
+ "they gave the last full measure of devotion--that we here highly "
+ "resolve that these dead shall not have died in vain, that this "
+ "nation under God shall have a new birth of freedom, and that "
+ "government of the people, by the people, for the people shall "
+ "not perish from the earth.";
/**
* Our text in a form for which we can obtain a
* AttributedCharacterIterator.
*/
private static final AttributedString mStyledText = new AttributedString(mText);
/**
* Print a single page containing some sample text.
*/
static public void main(String args[]) {
/* Get the representation of the current printer and
* the current print job.
*/
PrinterJob printerJob = PrinterJob.getPrinterJob();
/* Build a book containing pairs of page painters (Printables)
* and PageFormats. This example has a single page containing
* text.
*/
Book book = new Book();
book.append(new PrintText(), new PageFormat());
/* Set the object to be printed (the Book) into the PrinterJob.
* Doing this before bringing up the print dialog allows the
* print dialog to correctly display the page range to be printed
* and to dissallow any print settings not appropriate for the
* pages to be printed.
*/
printerJob.setPageable(book);
/* Show the print dialog to the user. This is an optional step
* and need not be done if the application wants to perform
* 'quiet' printing. If the user cancels the print dialog then false
* is returned. If true is returned we go ahead and print.
*/
boolean doPrint = printerJob.printDialog();
if (doPrint) {
try {
printerJob.print();
} catch (PrinterException exception) {
System.err.println("Printing error: " + exception);
}
}
}
/**
* Print a page of text.
*/
public int print(Graphics g, PageFormat format, int pageIndex) {
/* We'll assume that Jav2D is available.
*/
Graphics2D g2d = (Graphics2D) g;
/* Move the origin from the corner of the Paper to the corner
* of the imageable area.
*/
g2d.translate(format.getImageableX(), format.getImageableY());
/* Set the text color.
*/
g2d.setPaint(Color.black);
/* Use a LineBreakMeasurer instance to break our text into
* lines that fit the imageable area of the page.
*/
Point2D.Float pen = new Point2D.Float();
AttributedCharacterIterator charIterator = mStyledText.getIterator();
LineBreakMeasurer measurer = new LineBreakMeasurer(charIterator, g2d.getFontRenderContext());
float wrappingWidth = (float) format.getImageableWidth();
while (measurer.getPosition() < charIterator.getEndIndex()) {
TextLayout layout = measurer.nextLayout(wrappingWidth);
pen.y += layout.getAscent();
float dx = layout.isLeftToRight()? 0 : (wrappingWidth - layout.getAdvance());
layout.draw(g2d, pen.x + dx, pen.y);
pen.y += layout.getDescent() + layout.getLeading();
}
return Printable.PAGE_EXISTS;
}
}
しかし
これは私がやりたいことではありません。アイデアとしては、追加したテキストだけでなく、印刷するtxtファイルのようなドキュメントを送信できる必要があるため、以下のコードは機能せず、エラーメッセージも表示されず、印刷が完了したと表示されます。 ....ターミナルで、このジョブをキューでもう一度見ることができますが、何も出力されません。何が間違っているのでしょうか。
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.File;
import java.io.FileInputStream;
import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintException;
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.SimpleDoc;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.standard.Copies;
import javax.print.event.PrintJobAdapter;
import javax.print.event.PrintJobEvent;
public class PrintTextFile {
public static void main(String[] args) throws PrintException, IOException {
String defaultPrinter =
PrintServiceLookup.lookupDefaultPrintService().getName();
System.out.println("Default printer: " + defaultPrinter);
PrintService service = PrintServiceLookup.lookupDefaultPrintService();
FileInputStream in = new FileInputStream(new File("D:/Documents/testDocToPrintUsingJava.txt"));
PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();
pras.add(new Copies(1));
DocFlavor flavor = DocFlavor.INPUT_STREAM.AUTOSENSE;
Doc doc = new SimpleDoc(in, flavor, null);
DocPrintJob job = service.createPrintJob();
PrintJobWatcher pjw = new PrintJobWatcher(job);
job.print(doc, pras);
pjw.waitForDone();
in.close();
// send FF to eject the page
InputStream ff = new ByteArrayInputStream("\f".getBytes());
Doc docff = new SimpleDoc(ff, flavor, null);
DocPrintJob jobff = service.createPrintJob();
pjw = new PrintJobWatcher(jobff);
jobff.print(docff, null);
pjw.waitForDone();
}
}
class PrintJobWatcher {
boolean done = false;
PrintJobWatcher(DocPrintJob job) {
job.addPrintJobListener(new PrintJobAdapter() {
public void printJobCanceled(PrintJobEvent pje) {
allDone();
}
public void printJobCompleted(PrintJobEvent pje) {
allDone();
}
public void printJobFailed(PrintJobEvent pje) {
allDone();
}
public void printJobNoMoreEvents(PrintJobEvent pje) {
allDone();
}
void allDone() {
synchronized (PrintJobWatcher.this) {
done = true;
System.out.println("Printing done ...");
PrintJobWatcher.this.notify();
}
}
});
}
public synchronized void waitForDone() {
try {
while (!done) {
wait();
}
} catch (InterruptedException e) {
}
}
}