Here it is, usb pos thermal printer solution. It is purely in java. The only condition is that your printer is recognized by the OS as a printer 🙂
That means it will show up in the printers list and queue. Getting the latest drivers should do it.
And as a bonus it works in Windows, Mac, Linux(yes tried in all of them). You are welcome Internet.
Note: If anyone knows how to draw stuff and change fonts with pos commands will be great. Make small tutorial in java.
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import java.awt.Font; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.print.PageFormat; import java.awt.print.Printable; import java.awt.print.PrinterException; import java.util.ArrayList; import java.util.List; import javax.print.Doc; import javax.print.DocFlavor; import javax.print.DocPrintJob; import javax.print.PrintService; import javax.print.PrintServiceLookup; import javax.print.SimpleDoc; import javax.print.attribute.HashPrintRequestAttributeSet; import javax.print.attribute.PrintRequestAttributeSet; public class PrinterService implements Printable { public List<String> getPrinters(){ DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE; PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet(); PrintService printServices[] = PrintServiceLookup.lookupPrintServices( flavor, pras); List<String> printerList = new ArrayList<String>(); for(PrintService printerService: printServices){ printerList.add( printerService.getName()); } return printerList; } @Override public int print(Graphics g, PageFormat pf, int page) throws PrinterException { if (page > 0) { /* We have only one page, and 'page' is zero-based */ return NO_SUCH_PAGE; } /* * User (0,0) is typically outside the imageable area, so we must * translate by the X and Y values in the PageFormat to avoid clipping */ Graphics2D g2d = (Graphics2D) g; g2d.translate(pf.getImageableX(), pf.getImageableY()); /* Now we perform our rendering */ g.setFont(new Font("Roman", 0, 8)); g.drawString("Hello world !", 0, 10); return PAGE_EXISTS; } public void printString(String printerName, String text) { // find the printService of name printerName DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE; PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet(); PrintService printService[] = PrintServiceLookup.lookupPrintServices( flavor, pras); PrintService service = findPrintService(printerName, printService); DocPrintJob job = service.createPrintJob(); try { byte[] bytes; // important for umlaut chars bytes = text.getBytes("CP437"); Doc doc = new SimpleDoc(bytes, flavor, null); job.print(doc, null); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void printBytes(String printerName, byte[] bytes) { DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE; PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet(); PrintService printService[] = PrintServiceLookup.lookupPrintServices( flavor, pras); PrintService service = findPrintService(printerName, printService); DocPrintJob job = service.createPrintJob(); try { Doc doc = new SimpleDoc(bytes, flavor, null); job.print(doc, null); } catch (Exception e) { e.printStackTrace(); } } private PrintService findPrintService(String printerName, PrintService[] services) { for (PrintService service : services) { if (service.getName().equalsIgnoreCase(printerName)) { return service; } } return null; } } |
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public class Main { public static void main(String[] args) { PrinterService printerService = new PrinterService(); System.out.println(printerService.getPrinters()); //print some stuff printerService.printString("EPSON-TM-T20II", "\n\n testing testing 1 2 3eeeee \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"); // cut that paper! byte[] cutP = new byte[] { 0x1d, 'V', 1 }; printerService.printBytes("EPSON-TM-T20II", cutP); } } |