Zxing.jar生成带有logo的二维码

import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Hashtable;
import javax.imageio.ImageIO;
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;

public class QRCode
{
 
 private static final int BLACK = 0xFF000000;
 
 private static final int WHITE = 0xFFFFFFFF;
 
 private static final int WIDTH = 30;
 
 private static final int HEIGHT = 30;
 
 private QRCode(){};
 
 /**
 * drawQrcode(创建二维码通用方法) 
 * @param matrix 
 * @param logoPath logo文件路径 
 * @Exception IOException
  */
 public static BufferedImage drawQrcode(BitMatrix matrix, String logoPath) throws IOException
 {
  int width = matrix.getWidth();
  int height = matrix.getHeight();
  BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
  for(int x=0;x<width;x++)
  {
   for(int y=0;y<height;y++)
   {
    image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
   }
  }
  
  insertImage(image, logoPath, true);
  
  return image;
 }
 
 /**
 * drawQrcode(创建二维码通用方法) 
 * @param matrix 
 * @param logoPath logo文件路径 
 * @param needCompress 是否需要压缩logo
 * @Exception IOException
  */
 public static BufferedImage drawQrcode(BitMatrix matrix, String logoPath, boolean needCompress) throws IOException
 {
  int width = matrix.getWidth();
  int height = matrix.getHeight();
  BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
  for(int x=0;x<width;x++)
  {
   for(int y=0;y<height;y++)
   {
    image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
   }
  }
  
  insertImage(image, logoPath, needCompress);
  
  return image;
 }
 
 /**
 * drawQrcode(创建二维码通用方法) 
 * @param matrix 
 * @param logoPath logo文件路径 
 * @param format 文件格式
 * @param file 生成的二维码文件
 * @Exception IOException
  */
 public static void writeToFile(BitMatrix matrix, String logoPath, String format, File file) throws IOException
 {
  BufferedImage image = drawQrcode(matrix, logoPath);
  if(!ImageIO.write(image, format, file))
  {
   throw new IOException("could not write an image of format"+format+" to file"+file);
  }
 }
 
 /**
 * drawQrcode(创建二维码通用方法) 
 * @param matrix 
 * @param logoPath logo文件路径 
 * @param format 文件格式
 * @param stream 生成的二维码文件流
 * @Exception IOException
  */
 public static void writeToStream(BitMatrix matrix, String logoPath, String format, OutputStream stream) throws IOException
 {
  BufferedImage image = drawQrcode(matrix, logoPath);
  if(!ImageIO.write(image, format, stream))
  {
   throw new IOException("could not write an image of format"+format);
  }
 }
 
 /**
 * insertImage(向二维码中插入logo) 
 * @param image BufferedImage对象
 * @param logoPath logo文件路径
 * @param needCompress 是否需要压缩logo
  */
 private static void insertImage(BufferedImage image, String logoPath, boolean needCompress) throws IOException
 {
  File file = new File(logoPath);
  if(!file.exists())
  {
   System.err.println("该文件不存在"+logoPath);
  }
  Image src = ImageIO.read(file);
  int width = src.getWidth(null);
  int height = src.getHeight(null);
  if(needCompress)
  {
   if(width > WIDTH)
   {
    width = WIDTH;
   }
   if(height > HEIGHT)
   {
    height = HEIGHT;
   }
  }
  Image img = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
  BufferedImage bufImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_BGR);
  Graphics gs = bufImg.getGraphics();
  gs.drawImage(img, 0, 0, null);
  gs.dispose();
  
  src = img;
  
  Graphics2D gs2d = image.createGraphics();
  int x = (image.getWidth() - width)/2;
  int y = (image.getHeight() - height)/2;
  gs2d.drawImage(src, x, y, width, height, null);
  Shape shape = new RoundRectangle2D.Float(x, y, width, height, 6, 6);
  gs2d.setStroke(new BasicStroke(3f));
  gs2d.draw(shape);
  gs2d.dispose();
 }
 
 @SuppressWarnings("unchecked")
 public static void main(String[] args) throws WriterException, IOException
 {
  String text = "然而《读者文摘》的发展并非一帆风顺。1982年初，美国《读者文摘》来函指出：甘肃人民出版社使用《读者文摘》中文" +
          "名是不正当的，不符合国际版权协定。中美两家《读者文摘》长达数年的版权之争从此开始。从1990年开始，中美两家"+
       "《读者文摘》的版权之争再次升级。1992年美国《读者文摘》委托律师致函中国《读者文摘》，要求停止使用中文商标《读者文摘》。" +
       "后为化解与美国《读者文摘》发生的版权纠纷，1993年3月号《读者文摘》刊登征名启事，在读者中引起强烈反响，共收到应征信十万多封。" +
       "信中提到新名有：读者、读友、读者之家、谈天说地、共享等等。最后使用了《读者》一名。1993年第七期，《读者文摘》正式改名为《读者》。";
  int width = 300;
  int height = 300;
  String format = "jpg";
  String logoPath = "G:/学习/桌面文件备份/123.jpg";
  Hashtable table = new Hashtable();
  table.put(EncodeHintType.CHARACTER_SET, "utf-8");
  BitMatrix matrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, table);
  File file = new File("d:"+File.separator+"qrcode.jpg");
  QRCode.writeToFile(matrix, logoPath, format, file);
 }
}