Java连接小票打印机

package com.mohe.prient;

import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.print.Book;
import java.awt.print.PageFormat;
import java.awt.print.Paper;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;

public class Prient implements Printable {

@Override
public int print(Graphics g, PageFormat pf, int page) throws PrinterException {

if (page > 0) {
return NO_SUCH_PAGE;
}

Graphics2D g2d = (Graphics2D) g;
g2d.setFont(new Font("Default", Font.PLAIN, 14));
g2d.drawString("等位排单号", 50, 10);
g2d.drawString("-------------------------------------", 7, 20);
g2d.drawString("手机号码：" + "11111111111", 7, 35);
g2d.drawString("领号日期：" + "11111", 7, 65);
g2d.drawString("-------------------------------------", 7, 80);
g2d.setFont(new Font("Default", Font.PLAIN, 25));
g2d.drawString("小号", 7, 105);
g2d.setFont(new Font("Default", Font.PLAIN, 14));
g2d.drawString("您之前还有" + 5 + "桌客人在等待", 7, 130);
g2d.drawString("-------------------------------------", 7, 145);
g2d.drawString("*打印时间:" + "1111" + "*", 7, 160);
g2d.drawString("店名：" + "11", 7, 175);

return PAGE_EXISTS;
}

public static void main(String[] args) {

int height = 175 + 3 * 15 + 20;

// 通俗理解就是书、文档
Book book = new Book();

// 打印格式
PageFormat pf = new PageFormat();
pf.setOrientation(PageFormat.PORTRAIT);

// 通过Paper设置页面的空白边距和可打印区域。必须与实际打印纸张大小相符。
Paper p = new Paper();
p.setSize(230, height);
p.setImageableArea(5, -20, 230, height + 20);
pf.setPaper(p);

// 把 PageFormat 和 Printable 添加到书中，组成一个页面
book.append(new Prient(), pf);

// 获取打印服务对象
PrinterJob job = PrinterJob.getPrinterJob();
job.setPageable(book);
try {
job.print();
} catch (PrinterException e) {
System.out.println("================打印出现异常");
}

}

}