原文：http://www.open-open.com/code/view/1453520722495

 

package zxing;import com.google.zxing.BarcodeFormat;import com.google.zxing.Binarizer;import com.google.zxing.BinaryBitmap;import com.google.zxing.DecodeHintType;import com.google.zxing.EncodeHintType;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.MultiFormatWriter;import com.google.zxing.NotFoundException;import com.google.zxing.Result;import com.google.zxing.WriterException;import com.google.zxing.client.j2se.BufferedImageLuminanceSource;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.common.HybridBinarizer;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.geom.AffineTransform;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.Hashtable;import java.util.Map;import java.util.logging.Level;import java.util.logging.Logger;import javax.imageio.ImageIO;/** * * @author wiki */public class ZxingTool {        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;      /**     * 生成条形码     * @param contents 条形码内容     * @param width 条形码宽度     * @param height 条形码高度     * @return      */    public static BufferedImage encodeBarcode(String contents, int width, int height){        int codeWidth = 3 + // start guard                (7 * 6) + // left bars                5 + // middle guard                (7 * 6) + // right bars                3; // end guard        codeWidth = Math.max(codeWidth, width);        BufferedImage barcode = null;        try {            BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,BarcodeFormat.EAN_13, codeWidth, height, null);                       barcode= MatrixToImageWriter.toBufferedImage(bitMatrix);        } catch (Exception e) {            e.printStackTrace();        }        return barcode;    }        /**     * 解析读取条形码     * @param barcodePath 条形码文件路径     * @return      */    public static String decodeBarcode(String barcodePath){        BufferedImage image;        Result result = null;        try {            image = ImageIO.read(new File(barcodePath));            if (image != null) {                 LuminanceSource source = new BufferedImageLuminanceSource(image);                BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));                result = new MultiFormatReader().decode(bitmap, null);            }            return result.getText();        } catch (Exception e) {            e.printStackTrace();        }        return null;    }        /**     * 生成二维码     * @param context 二维码内容     * @param width 二维码图片宽度     * @param height 二维码图片高度     * @return      */    public static BufferedImage encodeQRcode(String context,int width,int height){        BufferedImage qrCode=null;        try {            Hashtable hints= new Hashtable();            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");            BitMatrix bitMatrix = new MultiFormatWriter().encode(context, BarcodeFormat.QR_CODE, width, height,hints);            qrCode = MatrixToImageWriter.toBufferedImage(bitMatrix);        } catch (WriterException ex) {            Logger.getLogger(ZxingTool.class.getName()).log(Level.SEVERE, null, ex);        }        return qrCode;    }        /**     * 生成带有logo标志的二维码     * @param context 二维码存储内容     * @param width 二维码宽度     * @param height 二维码高度     * @param logoPath  二维码logo路径     * @return      */    public static BufferedImage encodeLogoQRcode(String context,int width,int height,String logoPath){         BufferedImage logoQRcode=null;        try {             // 读取Logo图像              BufferedImage logoImage = scale(logoPath, IMAGE_WIDTH,IMAGE_HEIGHT, true);              int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT];              for (int i = 0; i < logoImage.getWidth(); i++) {                  for (int j = 0; j < logoImage.getHeight(); j++) {                      srcPixels[i][j] = logoImage.getRGB(i, j);                  }              }                        Map
     
       hint = new HashMap
      
       ();              hint.put(EncodeHintType.CHARACTER_SET, "utf-8");              hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);                         BitMatrix bitMatrix = new MultiFormatWriter().encode(context, BarcodeFormat.QR_CODE, width, height,hint);                         // 二维矩阵转为一维像素数组               int halfW = bitMatrix.getWidth() / 2;               int halfH = bitMatrix.getHeight() / 2;                          int[] pixels = new int[width * height];                 for (int y = 0; y < bitMatrix.getHeight(); y++) {                      for (int x = 0; x < bitMatrix.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] = bitMatrix.get(x, y) ? 0xff000000 : 0xfffffff;                          }                }              }            logoQRcode = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);              logoQRcode.getRaster().setDataElements(0, 0, width, height, pixels);                      } catch (WriterException ex) {            Logger.getLogger(ZxingTool.class.getName()).log(Level.SEVERE, null, ex);        }        return logoQRcode;    }        /**     * 解析读取二维码     * @param qrCodePath 二维码图片路径     * @return      */    public static String decodeQRcode(String qrCodePath){     BufferedImage image;       String qrCodeText = null;        try {              image = ImageIO.read(new File(qrCodePath));              LuminanceSource source = new BufferedImageLuminanceSource(image);              Binarizer binarizer = new HybridBinarizer(source);              BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);              Map
       
         hints = new HashMap
        
         ();              hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");            // 对图像进行解码            Result result = new MultiFormatReader().decode(binaryBitmap, hints);              qrCodeText = result.getText();        } catch (IOException e) {              e.printStackTrace();          } catch (NotFoundException e) {              e.printStackTrace();          }          return qrCodeText;    }        /**     * 对图片进行缩放     * @param imgPath 图片路径     * @param width 图片缩放后的宽度     * @param height 图片缩放后的高度     * @param hasFiller 是否补白     * @return      */    public static BufferedImage scale(String imgPath,int width,int height,boolean hasFiller){        double ratio = 0.0; // 缩放比例          File file = new File(imgPath);          BufferedImage srcImage = null;          try {            srcImage = ImageIO.read(file);        } catch (IOException ex) {            Logger.getLogger(ZxingTool.class.getName()).log(Level.SEVERE, null, ex);        }        Image finalImage;          finalImage = 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);              finalImage = 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.white);              graphic.fillRect(0, 0, width, height);              if (width == finalImage.getWidth(null)){                  graphic.drawImage(finalImage, 0,(height - finalImage.getHeight(null))/2,finalImage.getWidth(null), finalImage.getHeight(null),Color.white, null);              }else{                  graphic.drawImage(finalImage,(width - finalImage.getWidth(null))/2,0,finalImage.getWidth(null), finalImage.getHeight(null),Color.white, null);                  graphic.dispose();                  finalImage = image;              }        }          return (BufferedImage) finalImage;    }}