springboot 扫码
时间: 2023-11-14 21:08:49 浏览: 40
您可以使用 Spring Boot 的二维码生成器库,它可以轻松地生成 QR 码。您需要在 pom.xml 文件中添加以下依赖项:
```
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.4.0</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.4.0</version>
</dependency>
```
然后,您可以使用以下代码生成 QR 码:
```
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
public class QRCodeGenerator {
private static final String QR_CODE_IMAGE_PATH = "./MyQRCode.png";
private static void generateQRCodeImage(String text, int width, int height, String filePath)
throws WriterException, IOException {
QRCodeWriter qrCodeWriter = new QRCodeWriter();
Map<EncodeHintType, Object> hints = new HashMap<>();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height, hints);
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
bufferedImage.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
}
}
File qrCodeImage = new File(filePath);
ImageIO.write(bufferedImage, "png", qrCodeImage);
}
public static void main(String[] args) {
try {
generateQRCodeImage("https://www.baidu.com", 350, 350, QR_CODE_IMAGE_PATH);
} catch (WriterException e) {
System.out.println("Could not generate QR Code, WriterException :: " + e.getMessage());
} catch (IOException e) {
System.out.println("Could not generate QR Code, IOException :: " + e.getMessage());
}
}
}
```
这将生成一个名为 MyQRCode.png 的 QR 码,其中包含 https://www.baidu.com 的链接。