EscPos Library for Java

A basic Java ESC/POS implementation for receipt printers.

• EscPosBuilder provides a fluent style api for preparing ESC/POS data.
• SerialFactory is a type-safe solution for obtaining SerialPort connections on any platform.
• Printer and PrinterDispatcher facilitates multiple print jobs to multiple printers.

EscPosBuilder Usage

EscPosBuilder escPos = new EscPosBuilder();

byte[] data = escPos.initialize()
        .font(Font.EMPHASIZED)
        .align(Align.CENTER)
        .text("HELLO WORLD")
        .feed(5)
        .cut(Cut.PART)
        .getBytes();

SerialFactory Usage

SerialPort port = SerialFactory.jSerialPort("COM3", SerialConfig.CONFIG_9600_8N1());

port.openPort();
port.getOutputStream().write(data);
port.closePort();

Printer Usage

Printer printer = new JSerialFactoryPrinter("COM3", SerialConfig.CONFIG_9600_8N1()) {
PrintJob job = new PrintJob(data);

printer.print(job);

PrinterDispatcher Usage

PrinterDispatcher dispatcher = new PrinterDispatcherThreadsafe();
dispatcher.registerPrinter("Printer1", printer1);
dispatcher.registerPrinter("Printer2", printer2);
dispatcher.registerPrinter("Printer3", printer3);

dispatcher.requestPrint("Printer1", PrintJob.of(data));
dispatcher.requestPrint("Printer2", PrintJob.of(data));
dispatcher.requestPrint("Printer3", PrintJob.of(data));

EscPosBuilder Methods

initialize(); Printer initialization command (0x1B40)

reset(); Resets the buffer

close(); Closes the buffer

getBytes(); Returns the current buffer as a byte[]

raw(rxtxVal); Print a raw int, byte or byte[] to the buffer

text(String text); Print text to the buffer (will not print until feed(int lines) is called)

feed(int lines); Prints the preceding text and feeds the number of lines

font(Font font); Toggle one of the following fonts:

• Font.REGULAR
• Font.DH
• Font.DW
• Font.DWDH
• Font.EMPHASIZED
• Font.DH_EMPHASIZED
• Font.DW_EMPHASIZED
• Font.DWDH_EMPHASIZED

align(Align align); Toggle text alignment:

• Align.LEFT
• Align.CENTER
• Align.RIGHT

cut(Cut cut); Cuts the paper:

• Cut.FULL
• Cut.PART