中山做网站的大公司,wordpress文章链接带问号,深圳坪山高级中学,兰州新区城乡建设局网站最近因个人需求需要对根据内容生成二维码和进行解析#xff01;记录一下#xff01;二维码其实就是一种编码技术#xff0c;只是这种编码技术是用在图片上了#xff0c;将给定的一些文字#xff0c;数字转换为一张经过特定编码的图片。这里利用的是 google 公司的 zxing使…最近因个人需求需要对根据内容生成二维码和进行解析记录一下二维码其实就是一种编码技术只是这种编码技术是用在图片上了将给定的一些文字数字转换为一张经过特定编码的图片。这里利用的是 google 公司的 zxing使用方便可以操作条形码或者二维码等 导入相关jar包: !-- 二维码 --dependencygroupIdcom.google.zxing/groupIdartifactIdcore/artifactIdversion3.3.0/version/dependencydependencygroupIdcom.google.zxing/groupIdartifactIdjavase/artifactIdversion3.3.3/version/dependency 二维码工具类编 创建二维码图片
public static BufferedImage createImage(String charSet, String content, int qrWidth, int qrHeight) {Hashtable hints new Hashtable();hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.put(EncodeHintType.CHARACTER_SET, charSet);hints.put(EncodeHintType.MARGIN, 1);BitMatrix bitMatrix null;try {bitMatrix new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, qrWidth, qrHeight, // 修改二维码底部高度hints);} catch (WriterException e) {e.printStackTrace();}int width bitMatrix.getWidth();int height bitMatrix.getHeight();BufferedImage image new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);for (int x 0; x width; x) {for (int y 0; y height; y) {image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);}}return image;}
二维码设置logo:
public static void insertLogoImage(BufferedImage source, Image logo, int logoWidth, int logoHeight) {Graphics2D graph source.createGraphics();int qrWidth source.getWidth();int qrHeight source.getHeight();int x (qrWidth - logoWidth) / 2;int y (qrHeight - logoHeight) / 2;graph.drawImage(logo, x, y, logoWidth, logoHeight, null);Shape shape new RoundRectangle2D.Float(x, y, logoWidth, logoHeight, 6, 6);graph.setStroke(new BasicStroke(3f));graph.draw(shape);graph.dispose();}
将文明说明增加到二维码上: public static BufferedImage textToImage(String str, int width, int height, int fontSize) {BufferedImage textImage new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics2D g2 (Graphics2D) textImage.getGraphics();//开启文字抗锯齿g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);g2.setBackground(Color.WHITE);g2.clearRect(0, 0, width, height);g2.setPaint(Color.BLACK);FontRenderContext context g2.getFontRenderContext();Font font new Font(微软雅黑, Font.PLAIN, fontSize);g2.setFont(font);LineMetrics lineMetrics font.getLineMetrics(str, context);FontMetrics fontMetrics FontDesignMetrics.getMetrics(font);float offset (width - fontMetrics.stringWidth(str)) / 2;float y (height lineMetrics.getAscent() - lineMetrics.getDescent() - lineMetrics.getLeading()) / 2;g2.drawString(str, (int) offset, (int) y);return textImage;}
解析二维码 /** 解析二维码*/public static String decode(File file, DecodeHintType cherSet) throws Exception {BufferedImage image;image ImageIO.read(file);if (image null) {return null;}BufferedImageLuminanceSource source new BufferedImageLuminanceSource(image);BinaryBitmap bitmap new BinaryBitmap(new HybridBinarizer(source));Result result;Hashtable hints new Hashtable();hints.put(DecodeHintType.CHARACTER_SET, cherSet);hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);hints.put(DecodeHintType.PURE_BARCODE, Boolean.TRUE);result new MultiFormatReader().decode(bitmap, hints);String resultStr result.getText();return resultStr;} main方法测试类 public static void main(String[] args) {String content用户摄影作品版权信息;BufferedImage image QRCodeUtil.createImage( utf-8, content, 400, 400 );QRCodeUtil.addUpFont( image,用户摄影作品版权信息 );String formatNamepng;String imagePathD:\\temp\\java二维码.png;File filenew File(imagePath);try {ImageIO.write(image, formatName, file);} catch (IOException e) {e.printStackTrace();}String decode null;try {decode QRCodeUtil.decode(file, DecodeHintType.CHARACTER_SET);} catch (Exception e) {e.printStackTrace();}System.out.println(decode);System.out.println(执行完成);} 这样就实现了 二维码里面的内容根据实际数据来就行用手机扫描后查看。
