public class Test{ public static void main(String[] args) { try { QREncode(); QRReader(new File("D:\zxing1.gif")); } catch (WriterException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (NotFoundException e) { e.printStackTrace(); } } / * 生成二维码 */ public static void QREncode() throws WriterException, IOException { String content = "个人博客：https://www.cnblogs.com/huanzi-qch/";//二维码内容 int width = 200; // 图像宽度 int height = 200; // 图像高度 String format = "gif";// 图像类型 Map<EncodeHintType, Object> hints = new HashMap<>(); //内容编码格式 hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); // 指定纠错等级 hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); //设置二维码边的空度，非负数 hints.put(EncodeHintType.MARGIN, 1); BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints); MatrixToImageWriter.writeToPath(bitMatrix, format, new File("D:\zxing.gif").toPath());// 输出原图片 MatrixToImageConfig matrixToImageConfig = new MatrixToImageConfig(0xFF000001, 0xFFFFFFFF); /* 问题：生成二维码正常,生成带logo的二维码logo变成黑白 原因：MatrixToImageConfig默认黑白，需要设置BLACK、WHITE 解决：https://ququjioulai.iteye.com/blog/ */ BufferedImage bufferedImage = LogoMatrix(MatrixToImageWriter.toBufferedImage(bitMatrix,matrixToImageConfig), new File("D:\logo.png")); // BufferedImage bufferedImage = LogoMatrix(toBufferedImage(bitMatrix), new File("D:\logo.png")); ImageIO.write(bufferedImage, "gif", new File("D:\zxing1.gif"));//输出带logo图片 System.out.println("输出成功."); } / * 识别二维码 */ public static void QRReader(File file) throws IOException, NotFoundException { MultiFormatReader formatReader = new MultiFormatReader(); //读取指定的二维码文件 BufferedImage bufferedImage =ImageIO.read(file); BinaryBitmap binaryBitmap= new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(bufferedImage))); //定义二维码参数 Map hints= new HashMap<>(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); com.google.zxing.Result result = formatReader.decode(binaryBitmap, hints); //输出相关的二维码信息 System.out.println("解析结果："+result.toString()); System.out.println("二维码格式类型："+result.getBarcodeFormat()); System.out.println("二维码文本内容："+result.getText()); bufferedImage.flush(); } / * 二维码添加logo * @param matrixImage 源二维码图片 * @param logoFile logo图片 * @return 返回带有logo的二维码图片 * 参考：https://blog.csdn.net/weixin_/article/details/ */ public static BufferedImage LogoMatrix(BufferedImage matrixImage, File logoFile) throws IOException{ / * 读取二维码图片，并构建绘图对象 */ Graphics2D g2 = matrixImage.createGraphics(); int matrixWidth = matrixImage.getWidth(); int matrixHeigh = matrixImage.getHeight(); / * 读取Logo图片 */ BufferedImage logo = ImageIO.read(logoFile); //开始绘制图片 g2.drawImage(logo,matrixWidth/5*2,matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5, null);//绘制 BasicStroke stroke = new BasicStroke(5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND); g2.setStroke(stroke);// 设置笔画对象 //指定弧度的圆角矩形 RoundRectangle2D.Float round = new RoundRectangle2D.Float(matrixWidth/5*2, matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5,20,20); g2.setColor(Color.white); g2.draw(round);// 绘制圆弧矩形 //设置logo 有一道灰色边框 BasicStroke stroke2 = new BasicStroke(1,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND); g2.setStroke(stroke2);// 设置笔画对象 RoundRectangle2D.Float round2 = new RoundRectangle2D.Float(matrixWidth/5*2+2, matrixHeigh/5*2+2, matrixWidth/5-4, matrixHeigh/5-4,20,20); g2.setColor(new Color(128,128,128)); g2.draw(round2);// 绘制圆弧矩形 g2.dispose(); matrixImage.flush() ; return matrixImage ; } }
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