barcode4j条形码

短命女 2023-10-05 17:36 20阅读 0赞

barcode4j是用来生成条形码的一个工具包，之前找了好些工具包，这个包是免费的，有些是要收费的，

这个包是免费里面生成的条形码效果最好的，这里提供之前集成的示例代码。

import java.awt.Color;
    import java.awt.Font;
    import java.awt.FontMetrics;
    import java.awt.Graphics;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    
    import javax.imageio.ImageIO;
    
    import org.krysalis.barcode4j.ChecksumMode;
    import org.krysalis.barcode4j.HumanReadablePlacement;
    import org.krysalis.barcode4j.impl.upcean.UPCABean;
    import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;
    
    public final class BarcodeUtils
    {
        
        public static void createUPCABarcodeImage(String text, String content, OutputStream out) throws IOException
        {
        
              // 1、生成UPC条形码码
            UPCABean bean = new UPCABean();
            // 1.1 设置条形码参数
            final int dpi = 250; // 分辨率
            bean.setModuleWidth(0.20); // makes the narrow bar
                                       // width exactly one pixel
            bean.doQuietZone(true);
            bean.setBarHeight(7);
            bean.setChecksumMode(ChecksumMode.CP_AUTO);
            bean.setFontSize(2.4);
            bean.setQuietZone(3); // 留白
            bean.setMsgPosition(HumanReadablePlacement.HRP_BOTTOM);
            
            // Set up the canvas provider for monochrome PNG output
            BitmapCanvasProvider canvas = new BitmapCanvasProvider(dpi, BufferedImage.TYPE_BYTE_BINARY, false, 0);
            
            // 1.2 生成条形码
            bean.generateBarcode(canvas, content);
            // 2、将生成的条形码画出来
            BufferedImage barCodeImage = canvas.getBufferedImage();
            // 2.1 设置宽、高、图片类型
            BufferedImage newImage = new BufferedImage(394, 150, BufferedImage.TYPE_INT_RGB);
            // 绘图
            Graphics g2d = newImage.createGraphics();
            g2d.setColor(Color.WHITE);
            g2d.fillRect(0, 0, newImage.getWidth(), newImage.getHeight());
            g2d.drawImage(barCodeImage,
                (newImage.getWidth() - barCodeImage.getWidth()) / 2,
                (newImage.getHeight() - barCodeImage.getHeight()) / 2 + 8,
                barCodeImage.getWidth(),
                barCodeImage.getHeight(),
                null);
            // 创建字体
            Font font = new Font("Helvetica", Font.PLAIN, 20);
            g2d.setFont(font);
            FontMetrics fm = g2d.getFontMetrics();
            g2d.setColor(Color.BLACK);
            // 绘制文本
            g2d.drawString(text, (newImage.getWidth() - fm.stringWidth(text)) / 2, 25);
            ImageIO.write(newImage, "png", out);
            canvas.finish();
        }
        
    
    }