Java生成中间logo的二维码的示例代码

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;
    }
  }

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