Java 生产二维码流
时间: 2023-05-22 22:06:41 浏览: 40
以下是Java生成二维码流的代码示例:
```
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
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;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
public class QRCodeGenerator {
public static byte[] generateQRCodeImage(String text, int width, int height)
throws WriterException, IOException {
QRCodeWriter qrCodeWriter = new QRCodeWriter();
BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height);
BufferedImage qrCodeImage = MatrixToImageWriter.toBufferedImage(bitMatrix);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(qrCodeImage, "png", baos);
return baos.toByteArray();
}
}
```
你可以将`text`参数传入你想要生成二维码的内容,`width`和`height`参数分别指定二维码的宽度和高度。这个示例代码使用Google的zxing库来生成QR码,将QR码转换为图像,并将图像转换为PNG格式的字节数组。