【生成带图像logo的二维码地址】

直接上代码记录一下

      <dependency>
            <groupId>com.google.zxinggroupId>
            <artifactId>coreartifactId>
            <version>3.3.3version>
        dependency>

        <dependency>
            <groupId>com.google.zxinggroupId>
            <artifactId>javaseartifactId>
            <version>3.3.3version>
        dependency>

import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import org.apache.commons.lang3.StringUtils;
import org.springframework.mock.web.MockMultipartFile;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Random;

public class QRCodeGenerator {
    // 定义二维码的宽高
    public static final int WIDTH = 300;
    public static final int HEIGHT = 300;
    // 定义头像的宽高
    public static final int AVATAR_WIDTH = 50;
    public static final int AVATAR_HEIGHT = 50;
    // 默认头像
    public static final String AVATAR_URL = "默认头像";
    public static final String HTTP = "http://";
    public static final String HTTPS = "https://";
    public static final String TOP = "图片存储默认前缀";
    public static final String PATH = "/opt/";
    public static final String PNG = ".png";
    public static final String FORMAT_NAME = "png";
    public static final String CONTENT_TYPE = "text/plain";

    public static QrcodeDto encodeReturn(String content, String avatarUrl) throws IOException, WriterException{
        if(StringUtils.isBlank(avatarUrl)) {
            avatarUrl = AVATAR_URL;
        }
        if (!avatarUrl.startsWith(HTTP) && !avatarUrl.startsWith(HTTPS)) {
            avatarUrl = TOP + avatarUrl;
        }
        if(avatarUrl.startsWith(HTTP)) {
            avatarUrl = avatarUrl.replace(HTTP, HTTPS);
        }
        String destPath = PATH;
        // 创建QRCodeWriter对象
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        // 创建二维码对象
        Map<EncodeHintType,Object> map = new HashMap<>();
        map.put(EncodeHintType.CHARACTER_SET, "utf-8");
        map.put(EncodeHintType.MARGIN, 1);
        map.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 容错级别 H 最高 30%

        BitMatrix bitMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT,map);
        // 下载头像图片
        BufferedImage avatarImage = ImageIO.read(new URL(avatarUrl));
        // 将头像图片添加到二维码图片中
        BufferedImage bufferedImage = addAvatar(avatarImage, bitMatrix);
        // 判断文件是否存在
        if(!new File(destPath).exists()){
            new File(destPath).mkdirs();
        }
        String fileName = new Random().nextInt(99999999) + PNG;//生成随机文件名
        File file = new File(destPath + fileName);
        ImageIO.write(bufferedImage, FORMAT_NAME, file);

        FileInputStream fileInputStream = new FileInputStream(file);
        String fileName1 = file.getName();
        fileName = fileName1.substring((fileName1.lastIndexOf("/") + 1));

        QrcodeDto qrcodeDto = new QrcodeDto();
        qrcodeDto.setUrl(destPath + file);
        qrcodeDto.setFile(new MockMultipartFile(fileName, fileName, CONTENT_TYPE, fileInputStream));
        return qrcodeDto;
    }


    private static BufferedImage addAvatar(BufferedImage avatarImage, BitMatrix bitMatrix) {

        BufferedImage bitMatrixImage = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
        // 开始绘制二维码图片
        for (int x = 0; x < WIDTH; x++) {
            for (int y = 0; y < HEIGHT; y++) {
                // 二维码图片颜色（RGB）
                bitMatrixImage.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        // 压缩头像图片
        Image image = resizeImage(avatarImage);
        // 计算头像图片的位置坐标
        int x = (WIDTH - AVATAR_WIDTH) / 2;
        int y = (HEIGHT - AVATAR_HEIGHT) / 2;
        // 将头像图片添加到二维码图片中
        Graphics2D graphics = bitMatrixImage.createGraphics();
        graphics.drawImage(image, x, y, AVATAR_WIDTH, AVATAR_HEIGHT, null);
        Shape shape = new RoundRectangle2D.Float(x, y, AVATAR_WIDTH, AVATAR_HEIGHT, 6, 6);
        graphics.setStroke(new BasicStroke(3f));
        graphics.draw(shape);
        graphics.dispose();
        return bitMatrixImage;
    }

    private static Image resizeImage(BufferedImage avatarImage) {
        Image image = avatarImage.getScaledInstance(AVATAR_WIDTH, AVATAR_HEIGHT, Image.SCALE_SMOOTH);
        BufferedImage bufferedImage = new BufferedImage(AVATAR_WIDTH, AVATAR_HEIGHT, BufferedImage.TYPE_INT_RGB);
        Graphics graphics = bufferedImage.getGraphics();
        graphics.drawImage(image, 0, 0, null);
        graphics.dispose();
        return image;
    }
}

下面是更简单粗暴的方法

依赖

        <dependency>
            <groupId>com.github.liuyueyi.mediagroupId>
            <artifactId>qrcode-pluginartifactId>
            <version>2.5.5version>
        dependency>

代码 只需几行就可生成带logo的图片 还可以生成特殊的形状

    public static String qrUtilsCreate(String content, String avatarUrl) {
        String fileName = new Random().nextInt(99999999) + PNG;//生成随机文件名
        try {
            BufferedImage image = QrCodeGenWrapper
                    .of(content)
                    .setH(500)
                    .setW(500)
                    .setLogo(avatarUrl)
                    .setLogoRate(8)
                    .setBgCornerRadiusRate(8) //设置背景圆角
                    .setBgImg("1.png") //背景图片
                    .setBgStyle(QrCodeOptions.BgImgStyle.PENETRATE) // 设置背景样式
                    .setDrawStyle(QrCodeOptions.DrawStyle.OCTAGON) // 设置画风格
                    .setLogoBorder(true)
                    .setLogoStyle(QrCodeOptions.LogoStyle.ROUND) // 设置圆角
                    .setDrawPreColor(Color.orange) // 设置前置色 不设置默认为黑色
                    .asBufferedImage();
            File file = new File(PATH + fileName);
            ImageIO.write(image, FORMAT_NAME, file);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return PATH + fileName;
    }