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1空间做2个网站吗,爱站网官网查询域名,如何利用国外的网站开发客户,如何建微信商城网站前面我们知道了怎么通过使用 zxing 生成二维码以及条形码， 由于我们现在都是 web 端的项目了，那么我们看下怎么使用 Spring Boot 集成然后返回给前端展示： 工程源码对应的工程源码我放到了这里：github源码路径，点击…

前面我们知道了怎么通过使用 zxing 生成二维码以及条形码，由于我们现在都是 web 端的项目了，那么我们看下怎么使用 Spring Boot 集成然后返回给前端展示：

工程源码

对应的工程源码我放到了这里：github源码路径，点击这里查看

开始搭建

这里的整个过程就很简单了，引入依赖包还是和之前一样，另外搭建就两部分：

controller 层
utils 层

引入依赖

<dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.4.1</version>
</dependency><dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.4.1</version>
</dependency>

生成二维码

对应的 controller 代码示例：

@RestController
@RequestMapping(path = "/qrcode")
public class QrCodeController {// http://localhost:8080/qrcode/create?content=www.baidu.com@GetMapping(path = "/createQrCode")public void createQrCode(HttpServletResponse response, @RequestParam("content") String content) {try {// 创建二维码BufferedImage bufferedImage = QrCodeUtils.createImage(content, null, false);// 通过流的方式返回给前端responseImage(response, bufferedImage);} catch (Exception e) {e.printStackTrace();}}/*** 设置 可通过 postman 或者浏览器直接浏览** @param response      response* @param bufferedImage bufferedImage* @throws Exception e*/public void responseImage(HttpServletResponse response, BufferedImage bufferedImage) throws Exception {ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();ImageOutputStream imageOutput = ImageIO.createImageOutputStream(byteArrayOutputStream);ImageIO.write(bufferedImage, "jpeg", imageOutput);InputStream inputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());OutputStream outputStream = response.getOutputStream();response.setContentType("image/jpeg");response.setCharacterEncoding("UTF-8");IOUtils.copy(inputStream, outputStream);outputStream.flush();}
}

对应的工具类 QrCodeUtils

@Component
public class QrCodeUtils {private static final String CHARSET = "UTF-8";private static final String FORMAT_NAME = "JPG";/*** 二维码尺寸*/private static final int QRCODE_SIZE = 300;/*** LOGO宽度*/private static final int WIDTH = 60;/*** LOGO高度*/private static final int HEIGHT = 60;/*** 创建二维码图片** @param content    内容* @param logoPath   logo* @param isCompress 是否压缩Logo* @return 返回二维码图片* @throws WriterException e* @throws IOException     BufferedImage*/public static BufferedImage createImage(String content, String logoPath, boolean isCompress) throws WriterException, IOException {Hashtable<EncodeHintType, Object> hints = new Hashtable<>();// 设置二维码的错误纠正级别 高hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);// 设置字符集hints.put(EncodeHintType.CHARACTER_SET, CHARSET);// 设置边距hints.put(EncodeHintType.MARGIN, 1);// 生成二维码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 (logoPath == null || "".equals(logoPath)) {return image;}// 在二维码中增加 logoQrCodeUtils.insertImage(image, logoPath, isCompress);return image;}/*** 添加Logo** @param source     二维码图片* @param logoPath   Logo* @param isCompress 是否压缩Logo* @throws IOException void*/private static void insertImage(BufferedImage source, String logoPath, boolean isCompress) throws IOException {File file = new File(logoPath);if (!file.exists()) {return;}Image src = ImageIO.read(new File(logoPath));int width = src.getWidth(null);int height = src.getHeight(null);// 压缩LOGOif (isCompress) {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();// 绘制缩小后的图g.drawImage(image, 0, 0, null);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();}/*** 生成带Logo的二维码** @param content    二维码内容* @param logoPath   Logo* @param destPath   二维码输出路径* @param isCompress 是否压缩Logo* @throws Exception void*/public static void create(String content, String logoPath, String destPath, boolean isCompress) throws Exception {BufferedImage image = QrCodeUtils.createImage(content, logoPath, isCompress);mkdirs(destPath);ImageIO.write(image, FORMAT_NAME, new File(destPath));}/*** 生成不带Logo的二维码** @param content  二维码内容* @param destPath 二维码输出路径*/public static void create(String content, String destPath) throws Exception {QrCodeUtils.create(content, null, destPath, false);}/*** 生成带Logo的二维码，并输出到指定的输出流** @param content    二维码内容* @param logoPath   Logo* @param output     输出流* @param isCompress 是否压缩Logo*/public static void create(String content, String logoPath, OutputStream output, boolean isCompress) throws Exception {BufferedImage image = QrCodeUtils.createImage(content, logoPath, isCompress);ImageIO.write(image, FORMAT_NAME, output);}/*** 生成不带Logo的二维码，并输出到指定的输出流** @param content 二维码内容* @param output  输出流* @throws Exception void*/public static void create(String content, OutputStream output) throws Exception {QrCodeUtils.create(content, null, output, false);}/*** 二维码解析** @param file 二维码* @return 返回解析得到的二维码内容* @throws Exception String*/public static String parse(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);return result.getText();}/*** 二维码解析** @param path 二维码存储位置* @return 返回解析得到的二维码内容* @throws Exception String*/public static String parse(String path) throws Exception {return QrCodeUtils.parse(new File(path));}/*** 判断路径是否存在，如果不存在则创建** @param dir 目录*/public static void mkdirs(String dir) {if (dir != null && !"".equals(dir)) {File file = new File(dir);if (!file.isDirectory()) {file.mkdirs();}}}
}

测试

生成的二维码

生成条形码

对应的 controller 代码示例：

@RestController
@RequestMapping(path = "/barcode")
public class BarCodeController {@AutowiredBarCodeUtils barCodeUtils;// http://localhost:8080/barcode/createCode?content=987654132&barCodeWord=123456789@GetMapping(path = "/createCode")public void createQrCode(HttpServletResponse response, @RequestParam("content") String content, @RequestParam("content") String barCodeWord) {try {// 创建二维码ByteArrayOutputStream byteArrayOutputStream = barCodeUtils.barcodeGenerator(content, barCodeWord);// 通过流的方式返回给前端InputStream inputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());OutputStream outputStream = response.getOutputStream();response.setContentType("image/jpeg");response.setCharacterEncoding("UTF-8");IOUtils.copy(inputStream, outputStream);outputStream.flush();} catch (Exception e) {e.printStackTrace();}}}

对应的工具类 BarCodeUtils

@Component
public class BarCodeUtils {/*** 条形码宽度*/private static final int WIDTH = 200;/*** 条形码高度*/private static final int HEIGHT = 50;/*** 生成条形码，并加文字，以流的方式返回** @param content     内容* @param barCodeWord 二维码的文字* @return ByteArrayOutputStream*/public ByteArrayOutputStream barcodeGenerator(String content, String barCodeWord) {// 设置条形码参数HashMap<EncodeHintType, Object> hints = new HashMap<>();hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L); // 设置纠错级别为L（低）hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); // 设置字符编码为UTF-8try {// 生成条形码的矩阵BitMatrix matrix = new MultiFormatWriter().encode(content, BarcodeFormat.CODE_128, WIDTH, HEIGHT, hints);ByteArrayOutputStream outputStream = new ByteArrayOutputStream();BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(matrix);//底部加单号BufferedImage image = this.insertWords(bufferedImage, barCodeWord);if (Objects.isNull(image)) {throw new RuntimeException("条形码加文字失败");}ImageIO.write(image, "png", outputStream);return outputStream;} catch (WriterException | IOException e) {throw new RuntimeException("条形码生成失败", e);}}private BufferedImage insertWords(BufferedImage image, String words) {// 新的图片，把带logo的二维码下面加上文字if (StringUtils.hasLength(words)) {BufferedImage outImage = new BufferedImage(WIDTH, HEIGHT + 20, BufferedImage.TYPE_INT_RGB);Graphics2D g2d = outImage.createGraphics();// 抗锯齿this.setGraphics2D(g2d);// 设置白色this.setColorWhite(g2d);// 画条形码到新的面板g2d.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);// 画文字到新的面板Color color = new Color(0, 0, 0);g2d.setColor(color);// 字体、字型、字号g2d.setFont(new Font("微软雅黑", Font.PLAIN, 16));//文字长度int strWidth = g2d.getFontMetrics().stringWidth(words);//总长度减去文字长度的一半  （居中显示）int wordStartX = (WIDTH - strWidth) / 2;//height + (outImage.getHeight() - height) / 2 + 12int wordStartY = HEIGHT + 20;// time 文字长度// 画文字g2d.drawString(words, wordStartX, wordStartY);g2d.dispose();outImage.flush();return outImage;}return null;}/*** 设置 Graphics2D 属性  （抗锯齿）** @param g2d Graphics2D提供对几何形状、坐标转换、颜色管理和文本布局更为复杂的控制*/private void setGraphics2D(Graphics2D g2d) {// 消除画图锯齿g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);// 消除文字锯齿g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_DEFAULT);Stroke s = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER);g2d.setStroke(s);}private void setColorWhite(Graphics2D g2d) {g2d.setColor(Color.WHITE);//填充整个屏幕g2d.fillRect(0, 0, WIDTH, HEIGHT + 20);//设置笔刷g2d.setColor(Color.BLACK);}
}