Java条形码标签生成并打印示例

一、最近接收到需求

标签打印传入参数，生成标签，然后调用打印机（启锐488）进行打印

二、问题处理步骤

① 条形码生成 -- 使用zxing

② 图片生成 -- Graphics

③ 图片打印 -- printService

三、关键点描述

3.1、maven引用

    <!--条形码打印-->
     <dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>core</artifactId>
        <version>3.3.3</version>
    </dependency>
    
    <dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>javase</artifactId>
        <version>3.3.3</version>
    </dependency>
    <!--条形码打印-->

四、条形码生成代码示例

4.1、核心代码如下

  package com.hd.common.utils;
    /**
    * @author XA
    * date 2019/11/12 16:34
     * description  条形码工具类
    * params
    * return
    */
    @Component
    public class BarCodeUtils {
    
        @Value("${print.barCodeWidth}")
        private int barCodeWidth;

        @Value("${print.barCodeheight}")
        private int barCodeheight;

        @Value("${print.barCodeAndWordHeight}")
        private int barCodeAndWordHeight;

        /**
         * 功能描述: 条形码参数设置
         * Param:
         * Return:
         */
        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");
            }
        };

        /**
         * 功能描述:生成图片缓冲
         * Param: [vaNumber]
         * Return: java.awt.image.BufferedImage
         */
        public 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, barCodeWidth, barCodeheight, hints);
                return MatrixToImageWriter.toBufferedImage(bitMatrix);
            } catch (WriterException e) {
                e.printStackTrace();
            }
            return null;
        }

        /**
         * 功能描述: 条形码及文字刻画
         * Param: [image, words, verifyCodes]
         * Return: java.awt.image.BufferedImage
         */
        public BufferedImage insertWords(BufferedImage image, String words,String[] verifyCodes) throws IOException {
            if (StringUtils.isNotEmpty(words)) {
                BufferedImage outImage = new BufferedImage(barCodeWidth, barCodeAndWordHeight, BufferedImage.TYPE_INT_RGB);
                Graphics2D g2d = outImage.createGraphics();
                /* 抗锯齿 */
                setGraphics2D(g2d);
                /* 设置白色 */
                setColorWhite(g2d);
                /* 画文字到新的面板 */
                Color color=new Color(0, 0, 0);
                g2d.setColor(color);
                /* 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 = (barCodeWidth - strWidth) / 2;
                int wordStartY = barCodeheight + 20;
                /* 画文字 */
                for (int i = 0; i < verifyCodes.length; i++) {
                    if(i == 0){
                        /* 添加logo */
                        URL resourceUrl = BarCodeUtils.class.getClassLoader().getResource("statics/print/logo.png");
                        if(resourceUrl == null){
                            return null;
                        }
                        String imgLogoPath = resourceUrl.getPath();
                        BufferedImage bufferedImage = ImageIO.read(new FileInputStream(imgLogoPath));
                        g2d.drawImage(bufferedImage, 70, 20, 100, 70, null);
                        /* 添加首行文字 */
                        Font font = getFont(27);
                        int h = getFontHeight(font);
                        drawWords(g2d, font, verifyCodes[i], 250, i * h + 65);
                    }else{
                        Font font = getFont(22);
                        int h = getFontHeight(font);
                        drawWords(g2d, font, verifyCodes[i], 200 * (i-1) + 35, 3 * h + 60);
                    }
                }
                /* 画条形码到新的面板 */
                g2d.drawImage(image, 100, 190, 400, image.getHeight(), null);
                /* 补充运单号 */
                g2d.drawString(words, 215, 300);
                g2d.dispose();
                outImage.flush();
                return outImage;
            }
            return null;
        }
    
        /**
         * 功能描述: 画文字到面板
         * Param: [g2d, font, words, x, y]
         * Return: void
         */
        private void drawWords(Graphics2D g2d, Font font, String words, int x, int y){
            g2d.setFont(font);
            FontMetrics fm = sun.font.FontDesignMetrics.getMetrics(font);
            g2d.drawString(words, x, y);
        }

        /**
         * 功能描述:获取字体高度属性
         * Param: [font]
         * Return: int
         */
        private int getFontHeight(Font font){
            FontMetrics fm = sun.font.FontDesignMetrics.getMetrics(font);
            return fm.getHeight();
        }

        private static Font getFont(int size){
            return new Font("微软雅黑", Font.PLAIN, size);
        }

        /**
         * 功能描述: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
         * Return: void
         */
        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);
        }

        /**
         * 功能描述:设置背景色白色
         * Param: [g2d]
         * Return: void
         */
        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);
        }

    }

五、图片打印代码示例

5.1、图片打印控制类核心代码

    package com.hd.modules.print.controller;

    /**
    * @author XA
    * date 2019/11/13 10:13
     * description  打印控制类
    * params
    * return
    */
    @RestController
    @RequestMapping("/api/print")
    public class BHPrintController {

        @Autowired
        private BarCodeUtils barCodeUtils;

        @Autowired
        private BHPrintUtil bhPrintUtil;

        @RequestMapping("/expressLabelPrint")
        public R expressLabelPrint(@RequestBody(required = false) ReqBodyVO<BHExpressLabelVO> reqBodyVO){
            /* 图片生成 */
            BHExpressLabelVO bhExpressLabelVO = reqBodyVO.getData();
            String[] verifyWords = new String[4];
            verifyWords[0] = "唛头：" + bhExpressLabelVO.getShippingMarks();
            verifyWords[1] = "线路：" + bhExpressLabelVO.getLine();
            verifyWords[2] = "规格：" + bhExpressLabelVO.getSpecs();
            verifyWords[3] = "重量:" + bhExpressLabelVO.getWeight() + "KG";
            BufferedImage image = null;
            try {
                image = barCodeUtils.insertWords(barCodeUtils.getBarCode(bhExpressLabelVO.getOrderMainNo()), bhExpressLabelVO.getOrderMainNo(),verifyWords);
            } catch (IOException e) {
                e.printStackTrace();
            }
            String imgPath = BarCodeUtils.class.getClassLoader().getResource("statics/print/expressLabel.png").getPath();
            try {
                ImageIO.write(image, "jpg", new File(imgPath));
            } catch (IOException e) {
                e.printStackTrace();
            }

            /* 打印 */
            URL url = BarCodeUtils.class.getClassLoader().getResource("statics/print/expressLabel.png");
            if(url != null){
                String imgFilePath = url.getPath();
                bhPrintUtil.printPicture(imgFilePath);
            }else{

            }
            return R.ok().put("data","标签打印成功!");
        }

    }

六、打印机参数设置（这个视情况而定）

七、最终效果如下

更多精彩请关注guangmuhua.com