java实现二维码-生成带log的二维码

给大家带来一个生成带logo的二维码，代码中我以标注注释，如果要用的朋友们，只需要修改图片路径和网页路径就可以了。

1、需要jar包：Zxing和QRCode的jar包、jsp-api.jar、servlet-api.jar

2、创建类ZXingCode和Base64

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;

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("http://www.51bbw.cn/make/aqs/aixin-2.html", null, "");//这里表示扫描二维码后出现的网页，只需要把网址放上就可以了
	        }  
	        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("/") + "images/logo.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/Administrator/Desktop/logo.jpg";  //TODO 这里放的是你本地的图片路径
	        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()*2/10?(image.getWidth()*2/10):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  其中${imageBase64QRCode}对应二维码的imageBase64字符串
	            ImageIO.write(image, "png", new File("C:/Users/Administrator/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 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 getDecodeHintType()
	    {
	        // 用于设置QR二维码参数
	        Map hints = new HashMap();
	        // 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;
	        }
	    
}

public class Base64 {
		private static final char intToBase64[] = {
			'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
			'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
			'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
			'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
			'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
			'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7',
			'8', '9', '+', '/'
		};

		private static final char intToAltBase64[] = {
			'!', '"', '#', '$', '%', '&', '\'', '(', ')', ',',
			'-', '.', ':', ';', '<', '>', '@', '[', ']', '^',
			'`', '_', '{', '|', '}', '~', 'a', 'b', 'c', 'd',
			'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
			'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
			'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7',
			'8', '9', '+', '?'
		};

		private static final byte base64ToInt[] = {
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, 62, -1, -1, -1, 63, 52, 53,
			54, 55, 56, 57, 58, 59, 60, 61, -1, -1,
			-1, -1, -1, -1, -1, 0, 1, 2, 3, 4,
			5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
			15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
			25, -1, -1, -1, -1, -1, -1, 26, 27, 28,
			29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
			39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
			49, 50, 51
		};

		private static final byte altBase64ToInt[] = {
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, 0, 1, 2, 3, 4, 5, 6,
			7, 8, -1, 62, 9, 10, 11, -1, 52, 53,
			54, 55, 56, 57, 58, 59, 60, 61, 12, 13,
			14, -1, 15, 63, 16, -1, -1, -1, -1, -1,
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, 17, -1, 18, 19, 21, 20, 26, 27, 28,
			29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
			39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
			49, 50, 51, 22, 23, 24, 25
		};

		public static String byteArrayToBase64(byte bb[]) {
			return byteArrayToBase64(bb, false);
		}

		public static String byteArrayToAltBase64(byte bb[])	{
			return byteArrayToBase64(bb, true);
		}

		private static String byteArrayToBase64(byte bb[], boolean flag) {
			int i = bb.length;
			int j = i / 3;
			int k = i - 3 * j;
			int l = 4 * ((i + 2) / 3);
			StringBuffer stringbuffer = new StringBuffer(l);
			char ac[] = flag ? intToAltBase64 : intToBase64;
			int i1 = 0;
			for(int j1 = 0; j1 < j; j1++) {
				int k1 = bb[i1++] & 0xff;
				int i2 = bb[i1++] & 0xff;
				int k2 = bb[i1++] & 0xff;
				stringbuffer.append(ac[k1 >> 2]);
				stringbuffer.append(ac[k1 << 4 & 0x3f | i2 >> 4]);
				stringbuffer.append(ac[i2 << 2 & 0x3f | k2 >> 6]);
				stringbuffer.append(ac[k2 & 0x3f]);
			}

			if(k != 0) {
				int l1 = bb[i1++] & 0xff;
				stringbuffer.append(ac[l1 >> 2]);
				if(k == 1) {
					stringbuffer.append(ac[l1 << 4 & 0x3f]);
					stringbuffer.append("==");
				} else  {
					int j2 = bb[i1++] & 0xff;
					stringbuffer.append(ac[l1 << 4 & 0x3f | j2 >> 4]);
					stringbuffer.append(ac[j2 << 2 & 0x3f]);
					stringbuffer.append('=');
				}
			}
			return stringbuffer.toString();
		}

		public static byte[] base64ToByteArray(String s) {
			return base64ToByteArray(s, false);
		}

		public static byte[] altBase64ToByteArray(String s) {
			return base64ToByteArray(s, true);
		}

		private static byte[] base64ToByteArray(String s, boolean flag)	{
			byte bb[] = flag ? altBase64ToInt : base64ToInt;
			int i = s.length();
			int j = i / 4;
			if(4 * j != i)
				throw new IllegalArgumentException("String length must be a multiple of four.");
			int k = 0;
			int l = j;
			if(i != 0) {
				if(s.charAt(i - 1) == '=') {
					k++;
					l--;
				}
				if(s.charAt(i - 2) == '=')
				k++;
			}
			byte bc[] = new byte[3 * j - k];
			int i1 = 0;
			int j1 = 0;
			for(int k1 = 0; k1 < l; k1++) {
				int l1 = base64toInt(s.charAt(i1++), bb);
				int j2 = base64toInt(s.charAt(i1++), bb);
				int l2 = base64toInt(s.charAt(i1++), bb);
				int j3 = base64toInt(s.charAt(i1++), bb);
				bc[j1++] = (byte)(l1 << 2 | j2 >> 4);
				bc[j1++] = (byte)(j2 << 4 | l2 >> 2);
				bc[j1++] = (byte)(l2 << 6 | j3);
			}

			if(k != 0) {
				int i2 = base64toInt(s.charAt(i1++), bb);
				int k2 = base64toInt(s.charAt(i1++), bb);
				bc[j1++] = (byte)(i2 << 2 | k2 >> 4);
				if(k == 1) {
					int i3 = base64toInt(s.charAt(i1++), bb);
					bc[j1++] = (byte)(k2 << 4 | i3 >> 2);
				}
			}
			return bc;
		}

		private static int base64toInt(char c, byte bb[]) {
			byte b = bb[c];
			if(b < 0)
				throw new IllegalArgumentException("Illegal character " + c);
			else
				return b;
		}
	}