Java生成二维码可添加logo和文字功能

packagecom.luo.wctweb.util;

 importjava.awt.Color;

 importjava.awt.Font;

 importjava.awt.Graphics2D;

 importjava.awt.image.BufferedImage;

 importjava.io.ByteArrayOutputStream;

 importjava.io.File;

 importjava.util.Date;

 importjava.util.HashMap;

 importjava.util.Map;

 importjavax.imageio.ImageIO;

 importjavax.servlet.http.HttpServletRequest;

 importcom.google.zxing.BarcodeFormat;

 importcom.google.zxing.EncodeHintType;

 importcom.google.zxing.MultiFormatWriter;

 importcom.google.zxing.WriterException;

 importcom.google.zxing.common.BitMatrix;

 importcom.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

 importcom.lz.lsf.util.Base64;

 /** * @Description: (二维码) * @author：luoguohui * @date：2015-10-29 下午05:27:13 */

 publicclassZXingCode {

  privatestaticfinalintQRCOLOR =0xFF000000;//默认是黑色

  privatestaticfinalintBGWHITE =0xFFFFFFFF;//背景颜色

  publicstaticvoidmain(String[] args)throwsWriterException 

  { 

   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 */

  publicstaticString 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 =newZXingCode();

    BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE,400,400, zp.getDecodeHintType());

    returnzp.addLogo_QRCode(bim,newFile(filePath),newLogoConfig(), productName);

   }

   catch(Exception e)

   {

    e.printStackTrace();

   }

   returnnull;

  }

  /** * 给二维码图片添加Logo * * @param qrPic * @param logoPic */

  publicString 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 */

    intwidthLogo = 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 */

    intx = (image.getWidth() - widthLogo) /2;

    inty = (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 =newBufferedImage(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(newFont("宋体",Font.BOLD,30));//字体、字型、字号 

     intstrWidth = 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());

      intstrWidth1 = outg.getFontMetrics().stringWidth(productName1);

      intstrWidth2 = outg.getFontMetrics().stringWidth(productName2);

      outg.drawString(productName1,200- strWidth1/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2+12);

      BufferedImage outImage2 =newBufferedImage(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(newFont("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 =newByteArrayOutputStream();

    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",newFile("C:/Users/luoguohui/Desktop/TDC-"+newDate().getTime() +"test.png"));//TODO 

    String imageBase64QRCode = Base64.byteArrayToBase64(baos.toByteArray());

    baos.close();

    returnimageBase64QRCode;

   }

   catch(Exception e)

   {

    e.printStackTrace();

   }

   returnnull;

  }

  /** * 构建初始化二维码 * * @param bm * @return */

  publicBufferedImage fileToBufferedImage(BitMatrix bm)

  {

   BufferedImage image =null;

   try

   {

    intw = bm.getWidth(), h = bm.getHeight();

    image =newBufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

    for(intx =0; x < w; x++)

    {

     for(inty =0; y < h; y++)

     {

      image.setRGB(x, y, bm.get(x, y) ?0xFF000000:0xFFCCDDEE);

     }

    }

   }

   catch(Exception e)

   {

    e.printStackTrace();

   }

   returnimage;

  }

  /**  * 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 */

  publicBufferedImage  getQR_CODEBufferedImage(String content, BarcodeFormat  barcodeFormat,intwidth,intheight, Maphints)

  {

   MultiFormatWriter multiFormatWriter =null;

   BitMatrix bm =null;

   BufferedImage image =null;

   try

   {

    multiFormatWriter =newMultiFormatWriter();

    // 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);

    intw = bm.getWidth();

    inth = bm.getHeight();

    image =newBufferedImage(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(intx =0; x < w; x++)

    {

     for(inty =0; y < h; y++)

     {

      image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);

     }

    }

   }

   catch(WriterException e)

   {

    e.printStackTrace();

   }

   returnimage;

  }

  /** * 设置二维码的格式参数 * * @return */

  publicMapgetDecodeHintType()

  {

   // 用于设置QR二维码参数

   Maphints =newHashMap();

   // 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);

   returnhints;

  }

 }

  classLogoConfig

  {

   // logo默认边框颜色

   publicstaticfinalColor DEFAULT_BORDERCOLOR = Color.WHITE;

   // logo默认边框宽度

   publicstaticfinalintDEFAULT_BORDER =2;

   // logo大小默认为照片的1/5

   publicstaticfinalintDEFAULT_LOGOPART =5;

   privatefinalintborder = DEFAULT_BORDER;

   privatefinalColor borderColor;

   privatefinalintlogoPart;

   /**  * Creates a default config with on color {@link #BLACK} and off color *  {@link #WHITE}, generating normal black-on-white barcodes. */

   publicLogoConfig()

   {

    this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);

   }

   publicLogoConfig(Color borderColor,intlogoPart)

   {

    this.borderColor = borderColor;

    this.logoPart = logoPart;

   }

   publicColor getBorderColor()

   {

    returnborderColor;

   }

   publicintgetBorder()

   {

    returnborder;

   }

   publicintgetLogoPart()

   {

    returnlogoPart;

   }

  }