java - 如何在不显示打印对话框的情况下进行打印

import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintException;
import javax.print.PrintService;
import javax.print.SimpleDoc;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.standard.Copies;
import javax.print.attribute.standard.MediaSizeName;
import javax.print.attribute.standard.OrientationRequested;
import javax.print.attribute.standard.PrintQuality;
import java.io.FileInputStream;
import java.io.IOException;

public class PrintWithoutDialog {
    public static void main(String[] args) throws IOException, PrintException {
        String filePath = "path/to/your/file.txt";
        FileInputStream inputStream = new FileInputStream(filePath);
        DocFlavor flavor = DocFlavor.INPUT_STREAM.AUTOSENSE;
        Doc doc = new SimpleDoc(inputStream, flavor, null);

        PrintService printService = PrintServiceLookup.lookupDefaultPrintService();
        if (printService != null) {
            System.out.println("Found printer: " + printService.getName());
            DocPrintJob printJob = printService.createPrintJob();

            PrintRequestAttributeSet attributes = new HashPrintRequestAttributeSet();
            attributes.add(MediaSizeName.ISO_A4);
            attributes.add(OrientationRequested.PORTRAIT);
            attributes.add(new Copies(1));
            attributes.add(new PrintQuality(50));

            printJob.print(doc, attributes);
            System.out.println("Document sent to printer");
        } else {
            System.out.println("No printer found");
        }
    }
}