Java生成二维码可添加logo和文字功能

废话不多说，直接给大家贴代码了，具体代码如下所示：

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;
   }
  } 

以上所述是小编给大家介绍的Java生成二维码可添加logo和文字功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！