Java Pos Thermal Printer Example

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.


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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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;

}


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);
	
	}

}

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);

}

This entry was posted in Java and tagged on February 17, 2016

Java Pos Thermal Printer Example

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