从Zxing库获取二维码版本号

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;

import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;

public class QRCodeVersion {
    public static void main(String[] args) {
        try {
            // 读取二维码图片
            BufferedImage image = ImageIO.read(new File("qrcode.png"));

            // 将图片转换为二进制位图
            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));

            // 解码二维码
            Result result = new MultiFormatReader().decode(bitmap);

            // 获取二维码的BitMatrix对象
            BitMatrix bitMatrix = result.getBarcodeFormat();

            // 获取二维码的版本号
            int version = bitMatrix.getVersion();

            System.out.println("二维码版本号：" + version);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}