使用barcode4j條形碼生成，

mvn管理

<!-- 條形碼 -->
<dependency>
    <groupId>net.sf.barcode4j</groupId>
    <artifactId>barcode4j-light</artifactId>
    <version>2.0</version>
</dependency>

程式碼實現

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.krysalis.barcode4j.HumanReadablePlacement;
import org.krysalis.barcode4j.impl.code128.Code128Bean;
import org.krysalis.barcode4j.impl.code39.Code39Bean;
import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;
import org.krysalis.barcode4j.tools.UnitConv;

import java.awt.image.BufferedImage;
import java.io.*;

/**
 * 條形碼工具類
 *
 * @Author
 * @Date
 **/
@Slf4j
public class BarcodeUtil {

    /**
     * 生成檔案
     *
     * @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;
    }

    /**
     * 生成位元組
     *
     * @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;
        }
        Code128Bean bean = new Code128Bean();
        // 精細度
        final int dpi = 150;
        // module寬度
        final double moduleWidth = UnitConv.in2mm(2.0f / dpi);

        // 配置物件
        bean.setModuleWidth(moduleWidth);
        // bean.setWideFactor(3);
        bean.doQuietZone(false);

        //設定不顯示字元
        // bean.setMsgPosition(HumanReadablePlacement.HRP_NONE);

        String format = "image/png";
        try {
            // 輸出到流
            BitmapCanvasProvider canvas = new BitmapCanvasProvider(ous, format, dpi,
                    BufferedImage.TYPE_BYTE_BINARY, false, 0);
            // 生成條形碼
            bean.generateBarcode(canvas, msg);
            // 結束繪製
            canvas.finish();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}

原文連結