前言: 这周有个项目需要生成二维码, 研究了一下使用 Google 的 zxing 生成二维码, 发现效果还可以, 在这里记录下. 如果需要更加定制化的二维码, 也可接通第三方 API 服务生成二维码.
二维码的生成 :
- @Component("qrcodeHandler")
- public class QrcodeHandlerImpl implements QrcodeHandler {
- private static final Logger logger = LoggerFactory.getLogger(QrcodeHandlerImpl.class);
- /** 二维码颜色 */
- private static final int FRONT_COLOR = 0xFF000000; // 前景色黑色
- private static final int BACK_COLOR = 0xFFFFFFFF; // 背景色白色
- /** 编码格式 */
- private static final String CHARACTER_SET = "UTF-8";
- /** 图片类型 */
- private static final String FORMAT = "png";
- /** 二维码尺寸 */
- private static final int QRCODE_SIZE = 300;
- /** logo 信息 */
- private static final int LOGO_SIZE = 60;
- private static final HashMap<EncodeHintType, Object> hints;
- static {
- hints = new HashMap<EncodeHintType, Object>();
- hints.put(EncodeHintType.CHARACTER_SET, CHARACTER_SET);
- hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
- hints.put(EncodeHintType.MARGIN, 1);
- }
- /**
- * 生成简单的二维码
- *
- * @param contents 二维码实际内容, 包括网址, 文本, 文件等, 如 http://www.cnblogs.com/ark-blog/* @param destFile 生成的二维码文件
- */
- public void generateSimpleQrcode(String contents, File destFile) {
- try {
- // 1. 生成位矩阵
- BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
- // 2. 保存图片
- MatrixToImageWriter.writeToPath(bitMatrix, FORMAT, destFile.toPath());
- } catch (Exception e) {
- logger.error("#generateSimpleQrcode() - create qrcode failed, exception=[{}]", e);
- throw BusinessException.newInstance("500", "create qrcode failed");
- }
- }
- /**
- * 生成带 logo 的二维码
- *
- * @param contents 二维码实际内容, 包括网址, 文本, 文件等, 如 http://www.cnblogs.com/ark-blog/* @param logoFile logo
- * @param destFile 生成的二维码文件
- */
- public void generateLogoQrcode(String contents, File logoFile, File destFile) {
- try {
- // 1. 创建位矩阵图
- MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
- BitMatrix bitMatrix = multiFormatWriter.encode(contents, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
- BufferedImage qrcodeImage = new BufferedImage(QRCODE_SIZE, QRCODE_SIZE, BufferedImage.TYPE_INT_RGB);
- for (int x = 0; x < QRCODE_SIZE; x++) {
- for (int y = 0; y < QRCODE_SIZE; y++) {
- qrcodeImage.setRGB(x, y, bitMatrix.get(x, y) ? FRONT_COLOR : BACK_COLOR);
- }
- }
- // 2. 在矩阵图上绘制 logo
- Image logoImage = ImageIO.read(logoFile);
- BufferedImage logoBufferedImage = new BufferedImage(LOGO_SIZE, LOGO_SIZE, BufferedImage.TYPE_INT_RGB);
- logoBufferedImage.getGraphics().drawImage(logoImage, 0, 0, null);
- int position = (QRCODE_SIZE - LOGO_SIZE) / 2;
- Graphics2D graphics2d = qrcodeImage.createGraphics();
- graphics2d.drawImage(logoBufferedImage, position, position, null);
- graphics2d.dispose();
- // 3. 保存图片
- qrcodeImage.flush();
- ImageIO.write(qrcodeImage, FORMAT, destFile);
- } catch (Exception e) {
- logger.error("#generateLogoQrcode() - create qrcode failed, exception=[{}]", e);
- throw BusinessException.newInstance("500", "create qrcode failed");
- }
- }
- }
来源: http://www.bubuko.com/infodetail-2598937.html