java生成条形码

第一种：有缺点：在条形码下面不能加上汉字
转载：https://blog.csdn.net/qq_36410795/article/details/79052956
<!--条形码-->
<dependency>
   <groupId>net.sf.barcode4j</groupId>
   <artifactId>barcode4j-light</artifactId>
   <version>2.0</version>
</dependency>

　　

import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.krysalis.barcode4j.impl.code39.Code39Bean;
import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;
import org.krysalis.barcode4j.tools.UnitConv;
import org.springframework.util.StringUtils;
 
/**
 * 条形码工具类
 *
 * @author tangzz
 * @createDate 2015年9月17日
 *
 */
public class BarcodeUtil {
 
    /**
     * 生成文件
     *
     * @param msg
     * @param path
     * @return
     */
    public static File generateFile(String msg, String path) {
        File file = new File(path);
        try {
            generate(msg, new FileOutputStream(file));
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }
        return file;
    }
 
    /**
     * 生成字节
     *
     * @param msg
     * @return
     */
    public static byte[] generate(String msg) {
        ByteArrayOutputStream ous = new ByteArrayOutputStream();
        generate(msg, ous);
        return ous.toByteArray();
    }
 
    /**
     * 生成到流
     *
     * @param msg
     * @param ous
     */
    public static void generate(String msg, OutputStream ous) {
        if (StringUtils.isEmpty(msg) || ous == null) {
            return;
        }
 
        Code39Bean bean = new Code39Bean();
 
        // 精细度
        final int dpi = 150;
        // module宽度
        final double moduleWidth = UnitConv.in2mm(1.0f / dpi);
 
        // 配置对象
        bean.setModuleWidth(moduleWidth);
        bean.setWideFactor(3);
        bean.doQuietZone(false);
 
        String format = "image/png";
        try {
 
            // 输出到流
            BitmapCanvasProvider canvas = new BitmapCanvasProvider(ous, format, dpi,
                    BufferedImage.TYPE_BYTE_BINARY, false, 0);
 
            // 生成条形码
            bean.generateBarcode(canvas, msg);
 
            // 结束绘制
            canvas.finish();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
 
    public static void main(String[] args) {
        String msg = "123456789";
//        String path = "barcode.png";
        String path = "G:/Image/barcode.png";
        generateFile(msg, path);
        System.out.println("条形码生成=="+generateFile(msg, path));
    }
}

　　第二种：可以在条形码下方加上汉字：

https://blog.csdn.net/fxbin123/article/details/83515803
1、添加maven依赖
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.3</version>
        </dependency>

　　

package com.shengquan.holywater.modules.moju.utils;
import com.baomidou.mybatisplus.toolkit.StringUtils;
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 javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

/**
 * @description: 谷歌条形码打印
 * @author: Administrator
 * @date: 2019-03-07 14:46
 */
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 static void main(String[] args) throws IOException {
//        BufferedImage image = insertWords(getBarCode("123456789"), "123456789");
//        A80/90R8A(8A侧通孔)
        BufferedImage image = insertWords(getBarCode("A80/90R8A8A"), "A80/90R8A(8A侧通孔)");
        ImageIO.write(image, "jpg", new File("G:/Images/barcode.png"));
    }


}
3.程序包com.google.zxing.client.j2se不存在
4.com.google.zxing.client.j2se包下载地址：

https://pan.baidu.com/s/1K60wSnLmbch63QyUbimHfA

 提取码：junh