How to I split a jasper report into 2 pages horizontally

Question

I would like to print an A2 size report on jasper on an A4 size printer. i want to print it in four landscape prints so page 1 and 2 make the top of the A2 and pages 3 and 4 make the bottom part of the A2.

.______________________________.
|                             |                             |
|              1             |              2             |
|                             |                             |
|-----------..------------+--.--------------------|
|                             |                             |
|              3             |              4             |
|.______________|______________.|

normally printing only prints the left part page 1 and 3. how can I print all the four parts of the page, each on its own page

Here is a similar question about that https://stackoverflow.com/questions/4190741/how-to-generate-pdf-reports-that-spans-multiple-pages-horizontally but sadly without answer how to do that horizontal split into multiple pages. — cgrim, Sep 12 '18 at 18:58

score 1 · Accepted Answer · answered Sep 14 '18 at 03:13

Actually I was able to do it by (Not the best quality, but works for me at the moment):

first converting the jasper report an image,
then cropping the image into pieces of the printer paper size before sending them to the printer.
and sending the image to the printer one by one

JasperPrint jp = the_jasper_print_to_be_printed; // 
int i = 1; // Page Number to print
float zoom = 1f;

BufferedImage image = (BufferedImage) JasperPrintManager.printPageToImage(jp, i, zoom);
PrinterJob printJob = PrinterJob.getPrinterJob();
PageFormat pf = printJob.getPageFormat(null);
int paperWidth = Functions.StringToInt(pf.getImageableWidth());
int paperHeight = Functions.StringToInt(pf.getImageableHeight());
int x = 0, y = 0;
while (y < image.getHeight()) {
    x = 0;
    while (x < image.getWidth()) {
        Rectangle rect = new Rectangle(x, y, paperWidth, paperHeight);
        printImage(Functions.cropImage(image, rect), printJob);
        x += paperWidth;
    }
    y += paperHeight;
}

Function to crop image

public static BufferedImage cropImage(BufferedImage src, Rectangle rect) {
    int w = (rect.x + rect.width > src.getWidth()) ? src.getWidth() - rect.x : rect.width;
    int h = (rect.y + rect.height > src.getHeight()) ? src.getHeight()- rect.y : rect.height;
    BufferedImage dest = src.getSubimage(rect.x, rect.y, w, h);
    return dest;
}

Function to send cropped image to printer

private static void printImage(BufferedImage image, PrinterJob printJob) {
    printJob.setPrintable(new Printable() {
        public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {
            if (pageIndex != 0) {
                return NO_SUCH_PAGE;
            }
            graphics.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
            return PAGE_EXISTS;
        }
    });
    try {
        printJob.print();
    } catch (PrinterException e1) {
        e1.printStackTrace();
    }
}

How to I split a jasper report into 2 pages horizontally

1 Answers1