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java 解析二维码工具类

news 2025/8/11 8:27:24

mavn pom.xml

<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>javase</artifactId>
    <version>3.5.3</version>
</dependency>

java 测试类


import com.google.zxing.BinaryBitmap;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class QRCodeReader {

    public static String decodeQRCode(String filePath) {
        try {
            BufferedImage bufferedImage = ImageIO.read(new File(filePath));
            BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(bufferedImage)));
            Result result = new MultiFormatReader().decode(binaryBitmap);
            return result.getText();
        } catch (NotFoundException e) {
            System.err.println("No QR code found in the image.");
        } catch (IOException e) {
            System.err.println("Error reading the image file: " + e.getMessage());
        }
        return null;
    }

    public static void main(String[] args) {
        String filePath = QRCodeReader.class.getResource("/861393067237070.png").getPath();
        String qrCodeText = decodeQRCode(filePath);
        if (qrCodeText != null) {
            System.out.println("Decoded QR Code: " + qrCodeText);
        } else {
            System.out.println("Failed to decode QR code.");
        }
    }
}