链接转二维码 pom依赖<dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.3.0</version> </dependency>实现Demopackage com.example.demo.util; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.common.BitMatrix; import lombok.extern.slf4j.Slf4j; import org.springframework.util.ResourceUtils; import javax.imageio.ImageIO; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileNotFoundException; import java.io.IOException; import java.io.OutputStream; import java.text.SimpleDateFormat; import java.util.Date; import java.util.HashMap; import java.util.Map; /** * @author suaxi * @date 2021/12/13 9:48 */ @Slf4j public class QRCodeUtil { public static void main(String[] args) throws FileNotFoundException { String url = "https://wangchouchou.com"; //String path = FileSystemView.getFileSystemView().getHomeDirectory() + File.separator + "testQrcode"; String realPath = ResourceUtils.getURL("classpath:").getPath() + "static/QRCode/"; String fileName = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + ".jpg"; createQRCode(url, realPath, fileName); } public static String createQRCode(String url, String path, String fileName) { try { Map<EncodeHintType, Object> map = new HashMap<>(); map.put(EncodeHintType.CHARACTER_SET, "UTF-8"); BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 400, 400, map); File file = new File(path, fileName); if (file.exists() || (file.getParentFile().exists() || file.getParentFile().mkdirs()) && file.createNewFile()) { writeToFile(bitMatrix, "jpg", file); log.info(url + "转二维码成功"); } } catch (Exception e) { e.printStackTrace(); } return null; } private static void writeToFile(BitMatrix bitMatrix, String format, File file) throws IOException { BufferedImage image = toBufferedImage(bitMatrix); if (!ImageIO.write(image, format, file)) { throw new IOException("Could not write an image of format " + format + " to " + file); } } private static void writeStream(BitMatrix bitMatrix, String format, OutputStream outputStream) throws IOException { BufferedImage image = toBufferedImage(bitMatrix); if (!ImageIO.write(image, format, outputStream)) { throw new IOException("Could not write an image of format " + format + " to " + format); } } private static final int BLACK = 0xFF000000; private static final int WHITE = 0xFFFFFFFF; private static BufferedImage toBufferedImage(BitMatrix bitMatrix) { 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) ? BLACK : WHITE); } } return image; } }