前言

场景：一、推广海报贴上二维码，用户扫码跳转
二、二维码中间贴logo

eg：这里使用展示第一种场景

一、使用工具

Google开源项目ZXing（二维条码编解码）。

二、使用步骤

1.引入依赖

代码如下（示例）：

<dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.3.0</version>
</dependency>

2.使用工具类

代码如下（示例）：

public class QRCodeUtil {private static final String CHARSET = "utf-8";private static final String FORMAT_NAME = "JPG";// 二维码尺寸大小private static final int QRCODE_SIZE = 300;// LOGO贴图位置宽度private static final int WIDTH = 400;// LOGO贴图位置高度private static final int HEIGHT = 400;// LOGO开始位置宽度private static final int LEFT = 50;// LOGO开始位置高度private static final int UP = 50;private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {Map<EncodeHintType, Object> hints = new ConcurrentHashMap();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;}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LOGOif (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LOGOGraphics2D 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();}public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);mkdirs(destPath);ImageIO.write(image, FORMAT_NAME, new File(destPath));}public static BufferedImage encode(String content, String imgPath, boolean needCompress) throws Exception {BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);return image;}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();}}public static void encode(String content, String imgPath, String destPath) throws Exception {QRCodeUtil.encode(content, imgPath, destPath, false);}public static byte[] getQRCodeImage(String content) throws WriterException, IOException {QRCodeWriter qrCodeWriter = new QRCodeWriter();BitMatrix bitMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE);ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();MatrixToImageWriter.writeToStream(bitMatrix, FORMAT_NAME, pngOutputStream);byte[] pngData = pngOutputStream.toByteArray();return pngData;}public static void encode(String content, String destPath) throws Exception {QRCodeUtil.encode(content, null, destPath, false);}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);}public static void encode(String content, OutputStream output) throws Exception {QRCodeUtil.encode(content, null, output, false);}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 hints = new Hashtable();hints.put(DecodeHintType.CHARACTER_SET, CHARSET);result = new MultiFormatReader().decode(bitmap, hints);String resultStr = result.getText();return resultStr;}public static String decode(String path) throws Exception {return QRCodeUtil.decode(new File(path));}//二维码中间插入图片public static ByteArrayOutputStream encodeIO(String content, String imgPath, Boolean needCompress) throws Exception {BufferedImage image = QRCodeUtil.createImage(content, imgPath,needCompress);//创建储存图片二进制流的输出流ByteArrayOutputStream baos = new ByteArrayOutputStream();//将二进制数据写入ByteArrayOutputStreamImageIO.write(image, "jpg", baos);return baos;}private static BufferedImage createFromImage(String content, BufferedImage outer, boolean needCompress) throws Exception {Map<EncodeHintType, Object> hints = new ConcurrentHashMap();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);}}// 插入图片QRCodeUtil.insertFromImage(outer, image, needCompress);return outer;}private static void insertFromImage(BufferedImage src,BufferedImage qrCode,  boolean needCompress) throws Exception {Image image = null;int width = qrCode.getWidth(null);int height = qrCode.getHeight(null);if (needCompress) { // 压缩LOGOif (width > WIDTH) {width = WIDTH;}if (height > HEIGHT) {height = HEIGHT;}image = qrCode.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();}// 插入LOGOGraphics2D graph = src.createGraphics();graph.drawImage(image, LEFT, UP, null);graph.setColor(Color.WHITE);graph.dispose();}//图片中插入二维码public static ByteArrayOutputStream encodeIOWith(String content, BufferedImage outer, Boolean needCompress) throws Exception {//插入二维码BufferedImage image = QRCodeUtil.createFromImage(content, outer,needCompress);//添加文字水印addText(image, content);//创建储存图片二进制流的输出流ByteArrayOutputStream baos = new ByteArrayOutputStream();//将二进制数据写入ByteArrayOutputStreamImageIO.write(image, "jpg", baos);return baos;}public static void addText(BufferedImage image,String text){Graphics2D graph = image.createGraphics();
//        graph.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);// 5、设置水印文字颜色graph.setColor(Color.black);graph.setFont(new Font("宋体", Font.BOLD, 15));// 文字增加清晰度graph.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);// 6、设置文字水印内容graph.drawString("邀请码：", 240, 450);graph.drawString(text, 220, 470);graph.dispose();}
}

3.调用

 try {//二维码内容String content = "https://www.csdn.net/";String ossPath="poster1.jpg";//sso获取图片位数据byte[] download = ossSupport.download(ossPath);BufferedImage outerImg = ImageIO.read(new ByteArrayInputStream(download));//是否根据贴图位置空间压缩二维码Boolean needCompress = true;//图片海报outerImg中插入二维码和文字水印ByteArrayOutputStream out = QRCodeUtil.encodeIOWith(content, outerImg, needCompress);//返回二维码response.setCharacterEncoding("UTF-8");response.setContentType("image/jpeg;charset=UTF-8");response.setContentLength(out.size());ServletOutputStream outputStream = response.getOutputStream();outputStream.write(out.toByteArray());outputStream.flush();outputStream.close();}catch (Exception e){e.printStackTrace();}

结果

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java生成二维码推广海报添加二维码文字水印二维码添加LOGO

前言

一、使用工具

二、使用步骤

1.引入依赖

2.使用工具类

3.调用

结果

java生成二维码推广海报添加二维码文字水印二维码添加LOGO相关推荐

最新文章

热门文章

java生成二维码 推广海报添加二维码 文字水印 二维码添加LOGO

前言

一、使用工具

二、使用步骤

1.引入依赖

2.使用工具类

3.调用

结果

java生成二维码 推广海报添加二维码 文字水印 二维码添加LOGO相关推荐

最新文章

热门文章

java生成二维码推广海报添加二维码文字水印二维码添加LOGO

java生成二维码推广海报添加二维码文字水印二维码添加LOGO相关推荐