Java工具 - 带图片的二维码

来源：互联网发布：linux修改snmp团体名编辑：程序博客网时间：2024/05/01 08:53
由于项目的需要，用到自动生成二维码，在此记录下方便自己日后用到，也为需要的兄弟提供个参考例子。
/**  * 二维码工具类  *   */  public class QRCodeUtil {      private static final String CHARSET = "utf-8";  //编码格式    private static final String FORMAT_NAME = "JPG";  //图片格式    private static final int QRCODE_SIZE = 300;   // 二维码尺寸      private static final int WIDTH = 60;  // LOGO宽度      private static final int HEIGHT = 60;  // LOGO高度        private static BufferedImage createImage(String content, String imgPath,              boolean needCompress) throws Exception {          Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();          hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);          hints.put(EncodeHintType.CHARACTER_SET, CHARSET);          hints.put(EncodeHintType.MARGIN, 1);          BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);          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);              }          }          if (imgPath == null || "".equals(imgPath)) {              return image;          }          // 插入图片          QRCodeUtil.insertImage(image, imgPath, needCompress);          return image;      }        /**      * 插入LOGO      *       * @param source 二维码图片      * @param imgPath LOGO图片地址      * @param needCompress 是否压缩      * @throws Exception      */      private static void insertImage(BufferedImage source, String imgPath,              boolean needCompress) throws Exception {          File file = new File(imgPath);          if (!file.exists()) {              System.err.println(""+imgPath+"   该文件不存在！");              return;          }          Image src = ImageIO.read(new File(imgPath));          int width = src.getWidth(null);          int height = src.getHeight(null);          if (needCompress) { // 压缩LOGO              if (width > WIDTH) {                  width = WIDTH;              }              if (height > HEIGHT) {                  height = HEIGHT;              }              Image image = src.getScaledInstance(width, height,                      Image.SCALE_SMOOTH);              BufferedImage tag = new BufferedImage(width, height,                      BufferedImage.TYPE_INT_RGB);              Graphics g = tag.getGraphics();              g.drawImage(image, 0, 0, null); // 绘制缩小后的图              g.dispose();              src = image;          }          // 插入LOGO          Graphics2D graph = source.createGraphics();          int x = (QRCODE_SIZE - width) / 2;          int y = (QRCODE_SIZE - height) / 2;          graph.drawImage(src, x, y, width, height, null);          Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);          graph.setStroke(new BasicStroke(3f));          graph.draw(shape);          graph.dispose();      }        /**      * 生成二维码(内嵌LOGO)      *      * @param content 内容      * @param imgPath LOGO地址      * @param destPath 存放目录      * @param needCompress 是否压缩LOGO      * @throws Exception      */      public static String encode(String content, String imgPath, String destPath,              boolean needCompress) throws Exception {          BufferedImage image = QRCodeUtil.createImage(content, imgPath,                  needCompress);          mkdirs(destPath);          String file = new Random().nextInt(99999999)+".jpg";          ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));          return file;    }        /**      * 当文件夹不存在时，mkdirs会自动创建多层目录，     * 区别于mkdir．(mkdir如果父目录不存在则会抛出异常)      * @param destPath 存放目录      */      public static void mkdirs(String destPath) {          File file =new File(destPath);              //当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)          if (!file.exists() && !file.isDirectory()) {              file.mkdirs();          }      }        /**      * 生成二维码(内嵌LOGO)      *       * @param content 内容      * @param imgPath LOGO地址      * @param destPath 存储地址      * @throws Exception      */      public static String encode(String content, String imgPath, String destPath)              throws Exception {         return QRCodeUtil.encode(content, imgPath, destPath, false);      }        /**      * 生成二维码      *       * @param content 内容      * @param destPath 存储地址      * @param needCompress 是否压缩LOGO      * @throws Exception      */      public static void encode(String content, String destPath,              boolean needCompress) throws Exception {          QRCodeUtil.encode(content, null, destPath, needCompress);      }        /**      * 生成二维码      *       * @param content 内容      * @param destPath 存储地址      * @throws Exception      */      public static void encode(String content, String destPath) throws Exception {          QRCodeUtil.encode(content, null, destPath, false);      }        /**      * 生成二维码(内嵌LOGO)      *       * @param content 内容      * @param imgPath LOGO地址      * @param output 输出流      * @param needCompress 是否压缩LOGO      * @throws Exception      */      public static void encode(String content, String imgPath,              OutputStream output, boolean needCompress) throws Exception {          BufferedImage image = QRCodeUtil.createImage(content, imgPath,                  needCompress);          ImageIO.write(image, FORMAT_NAME, output);      }        /**      * 生成二维码      *       * @param content 内容      * @param output 输出流      * @throws Exception      */      public static void encode(String content, OutputStream output)              throws Exception {          QRCodeUtil.encode(content, null, output, false);      }        /**      * 解析二维码      *       * @param file  二维码图片      * @return      * @throws Exception      */      public static String decode(File file) 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<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();          hints.put(DecodeHintType.CHARACTER_SET, CHARSET);          result = new MultiFormatReader().decode(bitmap, hints);          String resultStr = result.getText();          return resultStr;      }        /**      * 解析二维码      *       * @param path 二维码图片地址      * @return      * @throws Exception      */      public static String decode(String path) throws Exception {          return QRCodeUtil.decode(new File(path));      }        public static void main(String[] args) throws Exception {          String text = "C://Users/Administrator/Desktop/imgs/logo.jpg";          QRCodeUtil.encode(text, "C://Users/Administrator/Desktop/imgs/logo.jpg", "C://Users/Administrator/Desktop/imgs/", true);      }  }
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