package com.ruoyi.common.core.utils.uuid;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Base64;

public class QRCodeGenerator {

    /**
     * 生成二维码图片的base64编码
     * @param text
     * @param width
     * @param height
     * @return
     * @throws WriterException
     * @throws IOException
     */
    public static String generateQRCodeBase64(String text, int width, int height) throws WriterException, IOException {
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height);

        ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();
        MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream);
        byte[] pngData = pngOutputStream.toByteArray();

        return Base64.getEncoder().encodeToString(pngData);
    }

    public static void main(String[] args) {
        try {
            String text = "Hello, World!";
            String base64QRCode = generateQRCodeBase64(text, 200, 200);
            System.out.println("Base64 QR Code: " + base64QRCode);
        } catch (WriterException | IOException e) {
            e.printStackTrace();
        }
    }
}