Java工具集-二维码工具类

        <!-- 二维码 -->
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.2.1</version>
        </dependency>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.2.1</version>
        </dependency>

package com.simple.util.minicode;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.sun.org.apache.xml.internal.security.utils.Base64;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
 * @program: simple_tools
 * @description: 生成base64的二维码
 * @author: ChenWenLong
 * @create: 2019-12-31 09:33
 **/
public class QRCodeUtil {

    /**
     * 功能描述:
     * 〈生成base64的二维码〉
     *
     * @params : [content]
     * @return : java.lang.String
     * @author : cwl
     * @date : 2019/12/31 9:34
     */
    public String crateQRCode(String content) throws IOException {
        System.out.println(content);
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        try {
            QRCodeWriter writer = new QRCodeWriter();
            BitMatrix bitMatrix = writer.encode(content, BarcodeFormat.QR_CODE, 200, 200);
            BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(bitMatrix);
            ImageIO.write(bufferedImage, "png", os);
            //添加图片标识
            return new String("data:image/png;base64," + Base64.encode(os.toByteArray()));
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            os.close();
        }
        return null;
    }
}