Java生成读取条形码和二维码图片

发布时间:2018-04-13作者:spider阅读(729)

    生成条形码,二维码图片,解析条形码,二维码图片的工具类,需要用到的jar包:core.jar,zxing-javase.jar

    ZxingTool.java        

    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;
    
    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<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>();  
                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<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();  
                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;
        }
    }

    文章转载自:http://www.open-open.com/code/view/1453520722495

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