Java二维码生成与解码 基于google zxing的Java二维码生成与解码
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一、添加Maven依赖(解码时需要上传二维码图片,所以需要依赖文件上传包)
<!-- google二维码工具 --> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.1.0</version> </dependency> <!-- 文件上传 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency>
二、创建生成二维码接口(接口参数为二维码内容,通常是URL)
/** * 生成二维码 * google zxing 实现 * @param text * @return */ @RequestMapping(value = "/qrcode/encode", method = RequestMethod.POST) public void encodeQrCode(String text, HttpServletResponse response) { try { // 设置二维码参数 Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, 150, 150, hints); //返回二维码 MatrixToImageWriter.writeToStream(bitMatrix, "jpg", response.getOutputStream()); } catch (Exception e) { e.printStackTrace(); } }
三、创建二维码解码接口(直接返回解码后的二维码内容)
/** * 二维码图片解码 * google zxing 实现 * @param qrImg * @return */ @RequestMapping(value = "/qrcode/decode", method = RequestMethod.POST) public String decodeQrCode(MultipartFile qrImg) { if (!qrImg.isEmpty()) { try { BufferedImage image = ImageIO.read(qrImg.getInputStream()); BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image))); // 定义二维码的参数: HashMap<DecodeHintType, Object> hints = new HashMap<>(); // 定义字符集 hints.put(DecodeHintType.CHARACTER_SET, "utf-8"); Result result = new MultiFormatReader().decode(binaryBitmap, hints); return result.getText(); } catch (Exception e) { e.printStackTrace(); } } return null; }
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