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<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; } }