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使用Zxing实现二维码生成器内嵌图片

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使用Zxing实现二维码生成器内嵌图片,具有一定的参考价值,具体如下:

基本思路是先使用zxing生成的二维码图片,然后读取图片,在其中插入图标,然后整个输出图片.

最近的项目中需要生成二维码,找了几个例子综合下,做出了最后的效果,二维码可以生成图片格式(jpg等)或者在web页面上显示,此片文章仅作记录,雷同之处多多,包涵。。。.

注:需要Zxing包装的工具类,大概的流程是读取内嵌的图片,将内容转化成二维码,将图片内嵌到二维码中,出图.

下面是完整代码:

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import Java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
 
 
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;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
 
 
public class Zxing {
 
 
private static final int BLACK = 0xFF000000 ;
private static final int WHITE = 0xFFFFFFFF ;
// 图片宽度的一般
  private static final int IMAGE_WIDTH = 80 ;
  private static final int IMAGE_HEIGHT = 80 ;
  private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2 ;
  private static final int FRAME_WIDTH = 2 ;
 
  // 二维码写码器
  private static MultiFormatWriter mutiWriter = new MultiFormatWriter();
public static void main(String[] args) {
try {
//BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400,hints);
String content= "13400000000" ; //二维码的内容
BufferedImage image = genBarcode(content, 400 , 400 , "F:\\amazed.png" );
   if (!ImageIO.write(image, "jpg" , new File( "F:\\2122.jpg" ))) {
    throw new IOException( "Could not write an image of format " );
   }
 
           /**
 
            //将上面的代码换成此处,使用流读入到页面即可
 
OutputStream os = response.getOutputStream();
 
  if (!ImageIO.write(image, "jpg",os)) {
 
        throw new IOException("Could not write an image of format ");
 
       }
 
           **/
} catch (WriterException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
 
private BufferedImage toBufferedImage(BitMatrix matrix) {
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);
}
}
return image;
}
private static BufferedImage genBarcode(String content, int width,
      int height, String srcImagePath) throws WriterException,
      IOException {
    // 读取源图像
    BufferedImage scaleImage = scale(srcImagePath, IMAGE_WIDTH,
        IMAGE_HEIGHT, true );
    int [][] srcPixels = new int [IMAGE_WIDTH][IMAGE_HEIGHT];
    for ( int i = 0 ; i < scaleImage.getWidth(); i++) {
      for ( int j = 0 ; j < scaleImage.getHeight(); j++) {
        srcPixels[i][j] = scaleImage.getRGB(i, j);
      }
    }
 
    Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>();
    hint.put(EncodeHintType.CHARACTER_SET, "utf-8" ); //内容编码
    hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); //错误等级
    hint.put(EncodeHintType.MARGIN, 1 ); //设置二维码外边框的空白区域的宽度
    // 生成二维码
    BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE,
        width, height, hint);
 
    // 二维矩阵转为一维像素数组
    int halfW = matrix.getWidth() / 2 ;
    int halfH = matrix.getHeight() / 2 ;
    int [] pixels = new int [width * height];
 
    for ( int y = 0 ; y < matrix.getHeight(); y++) {
      for ( int x = 0 ; x < matrix.getWidth(); x++) {
        // 读取图片
        if (x > halfW - IMAGE_HALF_WIDTH
            && x < halfW + IMAGE_HALF_WIDTH
            && y > halfH - IMAGE_HALF_WIDTH
            && y < halfH + IMAGE_HALF_WIDTH) {
          pixels[y * width + x] = srcPixels[x - halfW
              + IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];
       
        // 在图片四周形成边框
        else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
            && x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH
            && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
            + IMAGE_HALF_WIDTH + FRAME_WIDTH)
            || (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH
                && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
                && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
                + IMAGE_HALF_WIDTH + FRAME_WIDTH)
            || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
                && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
                && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
                - IMAGE_HALF_WIDTH + FRAME_WIDTH)
            || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
                && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
                && y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
                + IMAGE_HALF_WIDTH + FRAME_WIDTH)) {
          pixels[y * width + x] = 0xfffffff ;
        } else {
          // 此处可以修改二维码的颜色,可以分别制定二维码和背景的颜色;
          pixels[y * width + x] = matrix.get(x, y) ? 0xff000000
              : 0xfffffff ;
        }
      }
    }
 
    BufferedImage image = new BufferedImage(width, height,
        BufferedImage.TYPE_INT_RGB);
    image.getRaster().setDataElements( 0 , 0 , width, height, pixels);
 
    return image;
  }
 
  /**
   * 把传入的原始图像按高度和宽度进行缩放,生成符合要求的图标
   *
   * @param srcImageFile
   *      源文件地址
   * @param height
   *      目标高度
   * @param width
   *      目标宽度
   * @param hasFiller
   *      比例不对时是否需要补白:true为补白; false为不补白;
   * @throws IOException
   */
  private static BufferedImage scale(String srcImageFile, int height,
      int width, boolean hasFiller) throws IOException {
    double ratio = 0.0 ; // 缩放比例
    File file = new File(srcImageFile);
    BufferedImage srcImage = ImageIO.read(file);
    Image destImage = srcImage.getScaledInstance(width, height,
        BufferedImage.SCALE_SMOOTH);
    // 计算比例
    if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) {
      if (srcImage.getHeight() > srcImage.getWidth()) {
        ratio = ( new Integer(height)).doubleValue()
            / srcImage.getHeight();
      } else {
        ratio = ( new Integer(width)).doubleValue()
            / srcImage.getWidth();
      }
      AffineTransformOp op = new AffineTransformOp(
          AffineTransform.getScaleInstance(ratio, ratio), null );
      destImage = op.filter(srcImage, null );
    }
    if (hasFiller) { // 补白
      BufferedImage image = new BufferedImage(width, height,
          BufferedImage.TYPE_INT_RGB);
      Graphics2D graphic = image.createGraphics();
      graphic.setColor(Color.PINK);
      graphic.fillRect( 10 , 10 , width, height);
      graphic.drawRect( 100 , 360 , width, height);
      if (width == destImage.getWidth( null )) {
        graphic.drawImage(destImage, 0 ,
            (height - destImage.getHeight( null )) / 2 ,
            destImage.getWidth( null ), destImage.getHeight( null ),
            Color.white, null );
        Shape shape = new RoundRectangle2D.Float( 0 , (height - destImage.getHeight( null )) / 2 , width, width, 20 , 20 );
        graphic.setStroke( new BasicStroke(5f));
        graphic.draw(shape);
      }
      else {
        graphic.drawImage(destImage,
            (width - destImage.getWidth( null )) / 2 , 0 ,
            destImage.getWidth( null ), destImage.getHeight( null ),
            Color.white, null );
        Shape shape = new RoundRectangle2D.Float((width - destImage.getWidth( null )) / 2 , 0 , width, width, 20 , 20 );
        graphic.setStroke( new BasicStroke(5f));
        graphic.draw(shape);
      }
      graphic.dispose();
      destImage = image;
     
    }
    return (BufferedImage) destImage;
  }
}

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