Java生成中间logo的二维码(还可以加上二维码名称哦)

jopen 9年前

最近有负责微信开发,对于微信开发的项目,肯定少不了二维码啦,正好有个这样的需求,这对不同的商品生成一个二维码,扫码即刻下单。博主就弄了一个二维码生成的工具类。

弄出来之后,产品经理又说了,中间放上公司的logo是不是好一点?加上吧,

加上公司logo之后,产品经理想了想,每个商品都有个二维码,销售人员有很多个商品二维码,群发给用户,在qq群上,微信群上,怎么知道哪个二维码对应哪个商品的呢?于是决定要加上商品名称。最后商品二维码就成了下面这个模样了(当然啦,这里面的logo并不是博主现职公司的)。

这里写图片描述

效果已经出来啦,下面附上代码啦

如果读者不需要logo或者二维码名称的,读懂代码后进行删减即可。注释多多,还是很容易看懂的。

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;          }      }

需要说明的是以上代码依赖了com.google.zxing这个插件,如果读者跟博主一样都是使用maven的话,添加下面依赖即可。
如果没有用maven的话,直接在http://maven.outofmemory.cn/com.google.zxing/core/3.1.0/ 下载。

<dependency>      <groupId>com.google.zxing</groupId>      <artifactId>core</artifactId>      <version>3.1.0</version>  </dependency>

来自: http://blog.csdn.net//u013142781/article/details/50310419