java 根据url 生成二维码
/** * 生成不带白边的二维码 * * @param content 二维码内容(目标url) * @param qrCodePath 生成的二维码地址(最终保存地址) * @throws Exception 异常 */ public static void generatorQrCode(String content, String qrCodePath) throws Exception { Map<EncodeHintType, Object> hints = new HashMap<>(); hints.put(EncodeHintType.MARGIN, 0); BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, 256, 256, hints); // 去白边 int[] rec = bitMatrix.getEnclosingRectangle(); int resWidth = rec[2] + 1; int resHeight = rec[3] + 1; BitMatrix resMatrix = new BitMatrix(resWidth, resHeight); resMatrix.clear(); for (int i = 0; i < resWidth; i++) { for (int j = 0; j < resHeight; j++) { if (bitMatrix.get(i + rec[0], j + rec[1])) { resMatrix.set(i, j); } } } int width = resMatrix.getWidth(); int height = resMatrix.getHeight(); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { if (resMatrix.get(x, y)) { // image.setRGB(x, y, Color.BLACK.getRGB()); image.setRGB(x, y, -16777216); } else { // image.setRGB(x, y, Color.WHITE.getRGB()); image.setRGB(x, y, -1); } } } ImageIO.write(image, "png", new File(qrCodePath)); }
@Test public void test() { String qrCodePath = "https://www.baidu.com"; String qrCodeLocalPath = "C:\\Users\\Administrator\\Pictures\\测试\\百度首页22.png"; try { generatorQrCode(qrCodePath, qrCodeLocalPath); } catch (Exception e) { log.info("error :{}", JSON.toJSON(e)); } }