java生成二维码，可添加logo和文字

  package com.luo.wctweb.util;  
      
    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 javax.servlet.http.HttpServletRequest;  
    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;  
    import com.lz.lsf.util.Base64;  
      
    /** * @Description: (二维码) * @author：luoguohui * @date：2015-10-29 下午05:27:13 */  
    public class ZXingCode {  
        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    
            {    
                getLogoQRCode("https://www.baidu.com/", null, "跳转到百度的二维码");  
            }    
            catch (Exception e)    
            {    
                e.printStackTrace();    
            }    
        }    
      
      
        /** * 生成带logo的二维码图片 * * @param qrPic * @param logoPic */  
        public static String getLogoQRCode(String qrUrl,HttpServletRequest request,String productName)  
        {  
    // String filePath = 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 = "C:/Users/luoguohui/Desktop/78310a55b319ebc4fa3aef658126cffc1f17168f.jpg";  //TODO   
            String content = qrUrl;  
            try  
            {    
                ZXingCode zp = new ZXingCode();  
                BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType());  
                return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName);  
            }  
            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="data:image/png;base64,${imageBase64QRCode}"/> 其中${imageBase64QRCode}对应二维码的imageBase64字符串  
                ImageIO.write(image, "png", new File("C:/Users/luoguohui/Desktop/TDC-" + new Date().getTime() + "test.png")); //TODO   
      
                String imageBase64QRCode =  Base64.byteArrayToBase64(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;  
            }  
        }