默认打印图片

import javax.print.*;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.print.*;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

public class ImagePrinter {

    public static void main(String[] args) {
        /* load an image */
        BufferedImage image;
        try {
            image = ImageIO.read(new File("C:\\path\\to\\your\\image.jpg"));
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }

        /* set up a print request attributes */
        PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();

        /* locate a print service that can handle the request */
        PrintService[] printServices = PrintServiceLookup.lookupPrintServices(DocFlavor.SERVICE_FORMATTED.PRINTABLE, pras);
        if (printServices.length == 0) {
            System.err.println("No suitable printers found.");
            return;
        }

        /* set up a print job */
        PrinterJob printerJob = PrinterJob.getPrinterJob();
        printerJob.setPrintable(new ImagePrintable(printerJob, image));
        printerJob.setPrintService(printServices[0]);  // you may need to select a proper print service

        /* print the image */
        try {
            printerJob.print(pras);
        } catch (PrinterException e) {
            e.printStackTrace();
        }
    }

    static class ImagePrintable implements Printable {
        private double x, y, width;
        private int orientation;
        private BufferedImage image;

        ImagePrintable(PrinterJob printJob, BufferedImage image) {
            PageFormat pageFormat = printJob.defaultPage();
            this.x = pageFormat.getImageableX();
            this.y = pageFormat.getImageableY();
            this.width = pageFormat.getImageableWidth();
            this.orientation = pageFormat.getOrientation();
            this.image = image;
        }

        public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
            if (pageIndex != 0) {
                return NO_SUCH_PAGE;
            }
            Graphics2D g2d = (Graphics2D) g;
            g2d.translate(x, y);
            g2d.drawImage(image, 0, 0, (int) Math.round(width), (int) Math.round(width * image.getHeight() / image.getWidth()), null);
            return PAGE_EXISTS;
        }
    }
}

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