springboot-base/src/main/java/cn/efunbox/base/util/QRCodeUtil.java

package cn.efunbox.base.util;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import lombok.extern.log4j.Log4j;
import sun.misc.BASE64Encoder;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Hashtable;

@Log4j
public class QRCodeUtil {

    /**
     * 根据内容，生成指定宽高、指定格式的二维码图片
     *
     * @param url   内容
     * @return 生成的二维码图片路径
     * @throws Exception
     */
    public static String generateQRCode(String url) {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.MARGIN, 0);
        BitMatrix bitMatrix = null;
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        String QRCode="";
        try {
            bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 360, 360, hints);
            BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);
            ImageIO.write(image, "png", os);
            byte b[] = os.toByteArray();
            QRCode = new BASE64Encoder().encode(b);
        } catch (WriterException e) {
            log.error("WriterException:{}",e);
        } catch (IOException e) {
            log.error("IOEXCEPITON:{}",e);
        }finally {
            try {
                os.close();
            } catch (IOException e) {
                log.error("IOEXCEPITON:{}",e);
            }
        }
        return QRCode;
    }

}