创建实体类

public class Test {

    //条形码
    private String username;
    private String password;
    // 菜品名称
    private String name;
    // 价格
    private double money;
    // 数量
    private Integer num;
    //菜品分类
    private String fenlei;

    public Test() {
        super();
    }
    public Test(String name, double money, Integer num) {
        super();
        this.name = name;
        this.money = money;
        this.num = num;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public double getMoney() {
        return money;
    }
    public void setMoney(double money) {
        this.money = money;
    }
    public Integer getNum() {
        return num;
    }
    public void setNum(Integer num) {
        this.num = num;
    }
    public String getFenlei() {
        return fenlei;
    }
    public void setFenlei(String fenlei) {
        this.fenlei = fenlei;
    }
}

创建工具类

import com.example.demo.pojo.Test;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.util.ArrayList;
import java.util.List;

import static com.example.demo.utils.GoogleBarCodeUtils.getBarCode;
import static com.example.demo.utils.GoogleBarCodeUtils.insertWords;

public class Prient implements Printable{
    //条形码
    public static Test testt = new Test();
    // 菜品集合
    public static List<Test> testList = new ArrayList<Test>();

    // 设置小票打印
    public int print(Graphics g, PageFormat pf, int page)
            throws PrinterException {
        if (page > 0) {
            return NO_SUCH_PAGE;
        }
        Graphics2D g2d = (Graphics2D) g;
        // 设置颜色
        g2d.setColor(Color.BLACK);
        //模式  字体   字体大小
        g2d.setFont(new Font("Default", Font.PLAIN, 30));
        // 参数1：显示内容 参数2：横向偏移 参数3：纵向偏移
        g2d.drawString("点菜清单", 100, 50);
        g2d.drawString("------------------------------------------------", 40, 70);
        g2d.setFont(new Font("Default", Font.PLAIN, 20));
        g2d.drawString("点餐员：自定义", 40, 90);
        g2d.drawString("电话：自定义", 40, 110);
        g2d.drawString("用餐时间：自定义", 40, 130);
        g2d.drawString("用餐地址：打印测试", 40, 150);
        g2d.setFont(new Font("Default", Font.PLAIN, 20));
        g2d.drawString("------------------------------------------------", 40, 170);
        g2d.drawString("菜品             单价             小计", 40, 190);
        g2d.setFont(new Font("Default", Font.PLAIN, 20));
        int H1 = 190;
        double zmoney = 0;
        int count = 0;
        for (Test test : testList) {
            count = count + 1;
            H1 = H1 + 20;
            zmoney = test.getMoney() * test.getNum() + zmoney;
            g2d.drawString(count + "." + test.getName() + "(" + test.getNum()
                    + "份)     ￥" + test.getMoney()+"     ￥"+test.getMoney()*test.getNum(), 40, H1);
        }
        g2d.setFont(new Font("Default", Font.PLAIN, 20));
        g2d.drawString("------------------------------------------------", 40, H1 + 20);
        g2d.setFont(new Font("Default", Font.PLAIN, 20));
        g2d.drawString("合计：￥" + zmoney, 40, H1 + 40);
        g2d.drawString("优惠金额：￥" + 20, 40, H1 + 60);
        g2d.drawString("应收：￥" + (zmoney-20), 40, H1 + 80);
        g2d.drawString("实收：￥" + zmoney, 40, H1 + 100);
        g2d.drawString("找零：￥" + 20, 40, H1 + 120);
        g2d.drawString("收银员：" + "打印测试", 40, H1 + 140);
        g2d.drawString("谢谢惠顾，欢迎下次光临！", 80, H1 + 160);
        BufferedImage image = insertWords(getBarCode(testt.getUsername()), testt.getPassword());
        g2d.drawImage(image, 70, H1 + 180, null);
        return PAGE_EXISTS;
    }
    public static List<Test> getTestList() {
        return testList;
    }

    public static  void Settest(Test text){
        Prient.testt=text;
    }
    public static void setTestList(List<Test> testList) {
        Prient.testList = testList;
    }

生成条形码

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.oned.Code128Writer;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.HashMap;
import java.util.Map;
@Service
public class GoogleBarCodeUtils {
    /** 条形码宽度 */
    private static final int WIDTH = 300;

    /** 条形码高度 */
    private static final int HEIGHT = 50;

    /** 加文字 条形码 */
    private static final int WORDHEIGHT = 75;

    /**
     * 设置 条形码参数
     */
    private static Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>() {
        private static final long serialVersionUID = 1L;
        {
            // 设置编码方式
            put(EncodeHintType.CHARACTER_SET, "utf-8");
        }
    };

    /**
     * 生成 图片缓冲
     * @author fxbin
     * @param vaNumber  VA 码
     * @return 返回BufferedImage
     */
    public static BufferedImage getBarCode(String vaNumber){
        try {
            Code128Writer writer = new Code128Writer();
            // 编码内容, 编码类型, 宽度, 高度, 设置参数
            BitMatrix bitMatrix = writer.encode(vaNumber, BarcodeFormat.CODE_128, WIDTH, HEIGHT, hints);
            return MatrixToImageWriter.toBufferedImage(bitMatrix);
        } catch (WriterException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 把带logo的二维码下面加上文字
     * @author fxbin
     * @param image  条形码图片
     * @param words  文字
     * @return 返回BufferedImage
     */
    public static BufferedImage insertWords(BufferedImage image, String words){
        // 新的图片，把带logo的二维码下面加上文字
        if (StringUtils.isNotEmpty(words)) {

            BufferedImage outImage = new BufferedImage(WIDTH, WORDHEIGHT, BufferedImage.TYPE_INT_RGB);

            Graphics2D g2d = outImage.createGraphics();

            // 抗锯齿
            setGraphics2D(g2d);
            // 设置白色
            setColorWhite(g2d);

            // 画条形码到新的面板
            g2d.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
            // 画文字到新的面板
            Color color=new Color(0, 0, 0);
            g2d.setColor(color);
            // 字体、字型、字号
            g2d.setFont(new Font("微软雅黑", Font.PLAIN, 18));
            //文字长度
            int strWidth = g2d.getFontMetrics().stringWidth(words);
            //总长度减去文字长度的一半  （居中显示）
            int wordStartX=(WIDTH - strWidth) / 2;
            //height + (outImage.getHeight() - height) / 2 + 12
            int wordStartY=HEIGHT+20;

            // 画文字
            g2d.drawString(words, wordStartX, wordStartY);
            g2d.dispose();
            outImage.flush();
            return outImage;
        }
        return null;
    }

    /**
     * 设置 Graphics2D 属性  （抗锯齿）
     * @param g2d  Graphics2D提供对几何形状、坐标转换、颜色管理和文本布局更为复杂的控制
     */
    private static void setGraphics2D(Graphics2D g2d){
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_DEFAULT);
        Stroke s = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER);
        g2d.setStroke(s);
    }

    /**
     * 设置背景为白色
     * @param g2d Graphics2D提供对几何形状、坐标转换、颜色管理和文本布局更为复杂的控制
     */
    private static void setColorWhite(Graphics2D g2d){
        g2d.setColor(Color.WHITE);
        //填充整个屏幕
        g2d.fillRect(0,0,600,600);
        //设置笔刷
        g2d.setColor(Color.BLACK);
    }


//    public String add(addpojo addpojo){
//        BufferedImage image = insertWords(getBarCode(addpojo.getUsername()), addpojo.getUsername());
//        try {
//            ImageIO.write(image, "jpg", new File("D://impl/impl.jpg"));
//        } catch (IOException e) {
//            e.printStackTrace();
//        }
//        return "成功";
//    }

}

开始调试

import com.example.demo.pojo.Test;
import com.example.demo.utils.Prient;

import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.attribute.HashAttributeSet;
import javax.print.attribute.standard.PrinterName;
import java.awt.print.*;
import java.util.ArrayList;
import java.util.List;

public class DemoApplicationTests {

    public static void main(String[] args) {
        //这里是测试用的数据，自己定义就好了

        List<Test> testList = new ArrayList<Test>();
        Test t1 = new Test("麻辣牛肉", 23.00, 2);
        Test t2 = new Test("麻辣牛肉", 23.00, 4);
        Test t3 = new Test("精品千层肚", 24.00, 3);
        Test t4 = new Test("麻辣牛肉", 23.00, 2);
        Test t5 = new Test("极品鲜毛肚", 26.00, 1);
        Test t6 = new Test("极品鲜毛肚", 26.00, 1);
        Test t7 = new Test("极品鲜毛肚", 26.00, 1);
        Test t8 = new Test("极品鲜毛肚", 26.00, 1);
        Test t9 = new Test("极品鲜毛肚", 26.00, 1);
        testList.add(t1);
        testList.add(t2);
        testList.add(t3);
        testList.add(t4);
        testList.add(t5);
        testList.add(t6);
        testList.add(t7);
        testList.add(t8);
        testList.add(t9);
        Test test2 = new  Test();
        test2.setUsername("353632");
        test2.setPassword("22222");
        Prient.Settest(test2);

        // 设置小票模型菜品集合
        Prient.setTestList(testList);
        // 定义纸张高度
        int height = 500 + (testList.size() * 20) + 160;//这里根据纸张的大小
        // 通俗理解就是书、文档
        Book book = new Book();
        // 打印格式
        PageFormat pf = new PageFormat();
        // 原点在纸张的左上方，x 指向右方，y 指向下方。
        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();
        // 页面宽度 页面高度
        p.setSize(260, height);
        // x轴 y轴 宽度 高度
        p.setImageableArea(0, 0, 280, height);
        pf.setPaper(p);
        // 把 PageFormat 和 Printable 添加到书中，组成一个页面
        book.append(new Prient(), pf);
        // 指定打印机打印（printerName打印机名称）
        HashAttributeSet hs = new HashAttributeSet();
        String printerName = "Canon MF220 Series";
        hs.add(new PrinterName(printerName, null));
        PrintService[] pss = PrintServiceLookup.lookupPrintServices(null, hs);
        if (pss.length == 0) {
            System.out.println("无法找到打印机:" + printerName);
            return;
        }
        // 获取打印服务对象
        PrinterJob job = PrinterJob.getPrinterJob();
        // 写入书
        job.setPageable(book);
        try {
            Integer random6 = (int) ((Math.random() * 9 + 1) * 100000);
            System.out.println("Z"+System.currentTimeMillis()+random6.toString());
            // 添加指定的打印机
            job.setPrintService(pss[0]);
            // 打印执行
            job.print();
        } catch (PrinterException e) {
            System.out.println("================打印出现异常");
        }
    }

}

导入依赖

<dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.3</version>
        </dependency

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.9</version>
        </dependency>

        <dependency>
            <groupId>net.java.dev.jna</groupId>
            <artifactId>jna</artifactId>
            <version>5.7.0</version>
        </dependency>

        

image.png