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);

 }

}