Java代码生成带logo的二维码

也不记得是哪天闲的没有事做,突然对生成二维码感兴趣,所以在网上百度搜索了一番.总结代码如下:

package com.non.daily.diary;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;
import org.apache.commons.codec.binary.Base64;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * 
 * 生成测二维码中带有logo
 * @author     cWX551313
 * @version    2018年4月13日
 * @since      
 */
public class LogoQrCode
{
    private static final int QRCOLOR = 0xFF000000;   //默认是黑色
    private static final int BGWHITE = 0xFFFFFFFF;   //背景颜色


    public static void main(String[] args) throws WriterException  
    {  
        try  
        {  
//            File out = new File("F:/图片/ceshi.png");
//            //将图片写入ImageIO流
//           
//            BufferedImage img = ImageIO.read(out);
//            //将图片写出到指定位置（复制图片）
//            OutputStream ops = new FileOutputStream(new File("F:/test.jpg"));
//            ImageIO.write(img, "jpg", ops);    
            
            //https://www.baidu.com/
            String s =getLogoQRCode("HTTPS://QR.ALIPAY.COM/FKX01046GICM205WWUDECA", "2018.4.13 测试");//
            System.out.println("===="+s);
        }  
        catch (Exception e)  
        {  
            e.printStackTrace();  
        }  
    }  


    /**
     * 生成带logo的二维码图片
     * @param qrUrl 跳转链接
     * @param desc 描述
     * @return
     */

    public static String getLogoQRCode(String qrUrl,String desc)
    {
//      String filePath = (javax.servlet.http.HttpServletRequest)request.getSession().getServletContext().getRealPath("/") + "resources/images/logoImages/llhlogo.png";
        //filePath是二维码logo的路径，但是实际中我们是放在项目的某个路径下面的，所以路径用上面的，把下面的注释就好
        String filePath = "F:/图片/ceshi.png";  //TODO  
        String content = qrUrl;
        try
        {  
            LogoQrCode zp = new LogoQrCode();
            BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType());
            return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), desc);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 给二维码图片添加Logo
     *
     * @param qrPic
     * @param logoPic
     */
    public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName)
    {
        try
        {
            /**
             * 读取二维码图片，并构建绘图对象
             */
            BufferedImage image = bim;
            Graphics2D g = image.createGraphics();

            /**
             * 读取Logo图片
             */
            BufferedImage logo = ImageIO.read(logoPic);
            /**
             * 设置logo的大小,本人设置为二维码图片的20%,因为过大会盖掉二维码
             */
            int widthLogo = logo.getWidth(null)>image.getWidth()*3/10?(image.getWidth()*3/10):logo.getWidth(null), 
                heightLogo = logo.getHeight(null)>image.getHeight()*3/10?(image.getHeight()*3/10):logo.getWidth(null);

            /**
             * logo放在中心
             */
             int x = (image.getWidth() - widthLogo) / 2;
             int y = (image.getHeight() - heightLogo) / 2;
             /**
             * logo放在右下角
             *  int x = (image.getWidth() - widthLogo);
             *  int y = (image.getHeight() - heightLogo);
             */

            //开始绘制图片
            g.drawImage(logo, x, y, widthLogo, heightLogo, null);
//            g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
//            g.setStroke(new BasicStroke(logoConfig.getBorder()));
//            g.setColor(logoConfig.getBorderColor());
//            g.drawRect(x, y, widthLogo, heightLogo);
            g.dispose();

            //把商品名称添加上去，商品名称不要太长哦，这里最多支持两行。太长就会自动截取啦
            if (productName != null && !productName.equals("")) {
                //新的图片，把带logo的二维码下面加上文字
                BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);
                Graphics2D outg = outImage.createGraphics();
                //画二维码到新的面板
                outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
                //画文字到新的面板
                outg.setColor(Color.BLACK); 
                outg.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号 
                int strWidth = outg.getFontMetrics().stringWidth(productName);
                if (strWidth > 399) {
//                  //长度过长就截取前面部分
//                  outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); //画文字
                    //长度过长就换行
                    String productName1 = productName.substring(0, productName.length()/2);
                    String productName2 = productName.substring(productName.length()/2, productName.length());
                    int strWidth1 = outg.getFontMetrics().stringWidth(productName1);
                    int strWidth2 = outg.getFontMetrics().stringWidth(productName2);
                    outg.drawString(productName1, 200  - strWidth1/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 );
                    BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR);
                    Graphics2D outg2 = outImage2.createGraphics();
                    outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null);
                    outg2.setColor(Color.BLACK); 
                    outg2.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号 
                    outg2.drawString(productName2, 200  - strWidth2/2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight())/2 + 5 );
                    outg2.dispose(); 
                    outImage2.flush();
                    outImage = outImage2;
                }else {
                    outg.drawString(productName, 200  - strWidth/2 , image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 ); //画文字 
                }
                outg.dispose(); 
                outImage.flush();
                image = outImage;
            }
            logo.flush();
            image.flush();
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            baos.flush();
            ImageIO.write(image, "png", baos);

            //二维码生成的路径，但是实际项目中，我们是把这生成的二维码显示到界面上的，因此下面的折行代码可以注释掉
            //可以看到这个方法最终返回的是这个二维码的imageBase64字符串
            //前端用 <img src="https://img-blog.csdnimg.cn/2022010613553663056.png"/>  其中${imageBase64QRCode}对应二维码的imageBase64字符串
            Boolean t =ImageIO.write(image, "png", new File("F:/" + new Date().getTime() + "test.png"));
            System.out.println("+++"+t);

            String imageBase64QRCode =  Base64.encodeBase64URLSafeString(baos.toByteArray());

            baos.close();
            return imageBase64QRCode;
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        return null;
    }


    /**
     * 构建初始化二维码
     *
     * @param bm
     * @return
     */
    public BufferedImage fileToBufferedImage(BitMatrix bm)
    {
        BufferedImage image = null;
        try
        {
            int w = bm.getWidth(), h = bm.getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

            for (int x = 0; x < w; x++)
            {
                for (int y = 0; y < h; y++)
                {
                    image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);
                }
            }

        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        return image;
    }

    /**
     * 生成二维码bufferedImage图片
     *
     * @param content
     *            编码内容
     * @param barcodeFormat
     *            编码类型
     * @param width
     *            图片宽度
     * @param height
     *            图片高度
     * @param hints
     *            设置参数
     * @return
     */
    public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints)
    {
        MultiFormatWriter multiFormatWriter = null;
        BitMatrix bm = null;
        BufferedImage image = null;
        try
        {
            multiFormatWriter = new MultiFormatWriter();
            // 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数
            bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);
            int w = bm.getWidth();
            int h = bm.getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

            // 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色
            for (int x = 0; x < w; x++)
            {
                for (int y = 0; y < h; y++)
                {
                    image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
                }
            }
        }
        catch (WriterException e)
        {
            e.printStackTrace();
        }
        return image;
    }

    /**
     * 设置二维码的格式参数
     *
     * @return
     */
    public Map<EncodeHintType, Object> getDecodeHintType()
    {
        // 用于设置QR二维码参数
        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
        // 设置QR二维码的纠错级别（H为最高级别）具体级别信息
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        // 设置编码方式
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.MARGIN, 0);
        hints.put(EncodeHintType.MAX_SIZE, 350);
        hints.put(EncodeHintType.MIN_SIZE, 100);

        return hints;
    }
}

    class LogoConfig
    {
        // logo默认边框颜色
        public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
        // logo默认边框宽度
        public static final int DEFAULT_BORDER = 2;
        // logo大小默认为照片的1/5
        public static final int DEFAULT_LOGOPART = 5;

        private final int border = DEFAULT_BORDER;
        private final Color borderColor;
        private final int logoPart;

        /**
         * Creates a default config with on color {@link #BLACK} and off color
         * {@link #WHITE}, generating normal black-on-white barcodes.
         */
        public LogoConfig()
        {
            this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
        }

        public LogoConfig(Color borderColor, int logoPart)
        {
            this.borderColor = borderColor;
            this.logoPart = logoPart;
        }

        public Color getBorderColor()
        {
            return borderColor;
        }

        public int getBorder()
        {
            return border;
        }

        public int getLogoPart()
        {
            return logoPart;
        }
    }

其中里面用到的二维码jar,我上传的资源里有https://download.csdn.net/download/java_wucao/10346851.需要的自取.