<dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.2.1</version></dependency>

private static final int BLACK = 0xFF000000;private static final int WHITE = 0xFFFFFFFF;/** * 把生成的二維碼存入到圖片中 * @param matrix zxing包下的二維碼類 * @return */public static BufferedImage toBufferedImage(BitMatrix matrix) { int width = matrix.getWidth(); int height = matrix.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, matrix.get(x, y) ? BLACK : WHITE);  } } return image;}/** * 生成二維碼并寫入文件 * @param content 掃描二維碼的內容 * @param format 圖片格式 jpg * @param file  文件 * @throws Exception */public static void writeToFile(String content, String format, File file)  throws Exception { MultiFormatWriter multiFormatWriter = new MultiFormatWriter(); @SuppressWarnings("rawtypes") Map hints = new HashMap(); //設置UTF-8， 防止中文亂碼 hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); //設置二維碼四周白色區域的大小 hints.put(EncodeHintType.MARGIN,1); //設置二維碼的容錯性 hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); //畫二維碼 BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints); BufferedImage image = toBufferedImage(bitMatrix); if (!ImageIO.write(image, format, file)) {  throw new IOException("Could not write an image of format " + format + " to " + file); }}

/** * 給二維碼圖片加上文字 * @param pressText 文字 * @param qrFile  二維碼文件 * @param fontStyle * @param color * @param fontSize */public static void pressText(String pressText, File qrFile, int fontStyle, Color color, int fontSize) throws Exception { pressText = new String(pressText.getBytes(), "utf-8"); Image src = ImageIO.read(qrFile); int imageW = src.getWidth(null); int imageH = src.getHeight(null); BufferedImage image = new BufferedImage(imageW, imageH, BufferedImage.TYPE_INT_RGB); Graphics g = image.createGraphics(); g.drawImage(src, 0, 0, imageW, imageH, null); //設置畫筆的顏色 g.setColor(color); //設置字體 Font font = new Font("宋體", fontStyle, fontSize); FontMetrics metrics = g.getFontMetrics(font); //文字在圖片中的坐標 這里設置在中間 int startX = (WIDTH - metrics.stringWidth(pressText)) / 2; int startY = HEIGHT/2; g.setFont(font); g.drawString(pressText, startX, startY); g.dispose(); FileOutputStream out = new FileOutputStream(qrFile); ImageIO.write(image, "JPEG", out); out.close(); System.out.println("image press success");}

public static void main(String[] args) throws Exception { File qrcFile = new File("/Users/deweixu/","google.jpg"); writeToFile("www.google.com.hk", "jpg", qrcFile); pressText("谷歌", qrcFile, 5, Color.RED, 32);}