一.maven依赖
下载google的二维码工具包来进行二维码的生成，下面是jar包的maven下载

<dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.1.0</version>
</dependency>
<dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.1.0</version>
</dependency>

二.代码部分

import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;/*** @ProjectName: spring-oauth-parent* @Package: com.louis.spring.oauth.client.config* @ClassName: QRCodeUtils* @Author: myHb* @Description: QRCodeUtils* @Date: 2020/7/16 9:25* @Version: 1.0*/
public class QRCodeUtils {private static final String CHARSET = "utf-8";private static final String FORMAT_NAME = "JPG";// 二维码尺寸private static final int QRCODE_SIZE = 300;// LOGO宽度private static final int WIDTH = 60;// LOGO高度private static final int HEIGHT = 60;private static BufferedImage createImage(String content, String imgPath,boolean needCompress) throws Exception {Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.put(EncodeHintType.CHARACTER_SET, CHARSET);hints.put(EncodeHintType.MARGIN, 1);BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);int width = bitMatrix.getWidth();int height = bitMatrix.getHeight();BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);for (int x = 0; x < width; x++) {for (int y = 0; y < height; y++) {image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000: 0xFFFFFFFF);}}if (imgPath == null || "".equals(imgPath)) {return image;}// 插入图片QRCodeUtils.insertImage(image, imgPath, needCompress);return image;}/*** 插入LOGO** @param source*            二维码图片* @param imgPath*            LOGO图片地址* @param needCompress*            是否压缩* @throws Exception*/private static void insertImage(BufferedImage source, String imgPath,boolean needCompress) throws Exception {File file = new File(imgPath);if (!file.exists()) {System.err.println(""+imgPath+"   该文件不存在！");return;}Image src = ImageIO.read(new File(imgPath));int width = src.getWidth(null);int height = src.getHeight(null);if (needCompress) { // 压缩LOGOif (width > WIDTH) {width = WIDTH;}if (height > HEIGHT) {height = HEIGHT;}Image image = src.getScaledInstance(width, height,Image.SCALE_SMOOTH);BufferedImage tag = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);Graphics g = tag.getGraphics();g.drawImage(image, 0, 0, null); // 绘制缩小后的图g.dispose();src = image;}// 插入LOGOGraphics2D graph = source.createGraphics();int x = (QRCODE_SIZE - width) / 2;int y = (QRCODE_SIZE - height) / 2;graph.drawImage(src, x, y, width, height, null);Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);graph.setStroke(new BasicStroke(3f));graph.draw(shape);graph.dispose();}/*** 生成二维码(内嵌LOGO)** @param content*            内容* @param imgPath*            LOGO地址* @param destPath*            存放目录* @param needCompress*            是否压缩LOGO* @throws Exception*/public static String encode(String content, String imgPath, String destPath,boolean needCompress) throws Exception {BufferedImage image = QRCodeUtils.createImage(content, imgPath,needCompress);mkdirs(destPath);String file = new Random().nextInt(99999999)+".jpg";ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));return file;}/*** 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)* @date 2013-12-11 上午10:16:36* @param destPath 存放目录*/public static void mkdirs(String destPath) {File file = new File(destPath);//当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)if (!file.exists() && !file.isDirectory()) {file.mkdirs();}}/*** 生成二维码(内嵌LOGO)** @param content*            内容* @param imgPath*            LOGO地址* @param destPath*            存储地址* @throws Exception*/public static void encode(String content, String imgPath, String destPath)throws Exception {QRCodeUtils.encode(content, imgPath, destPath, false);}/*** 生成二维码** @param content*            内容* @param destPath*            存储地址* @param needCompress*            是否压缩LOGO* @throws Exception*/public static void encode(String content, String destPath,boolean needCompress) throws Exception {QRCodeUtils.encode(content, null, destPath, needCompress);}/*** 生成二维码** @param content*            内容* @param destPath*            存储地址* @throws Exception*/public static void encode(String content, String destPath) throws Exception {QRCodeUtils.encode(content, null, destPath, false);}/*** 生成二维码(内嵌LOGO)** @param content*            内容* @param imgPath*            LOGO地址* @param output*            输出流* @param needCompress*            是否压缩LOGO* @throws Exception*/public static void encode(String content, String imgPath,OutputStream output, boolean needCompress) throws Exception {BufferedImage image = QRCodeUtils.createImage(content, imgPath,needCompress);ImageIO.write(image, FORMAT_NAME, output);}/*** 生成二维码** @param content*            内容* @param output*            输出流* @throws Exception*/public static void encode(String content, OutputStream output)throws Exception {QRCodeUtils.encode(content, null, output, false);}/*** 解析二维码** @param file*            二维码图片* @return* @throws Exception*/public static String decode(File file) throws Exception {BufferedImage image;image = ImageIO.read(file);if (image == null) {return null;}BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));Result result;Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();hints.put(DecodeHintType.CHARACTER_SET, CHARSET);result = new MultiFormatReader().decode(bitmap, hints);String resultStr = result.getText();return resultStr;}/*** 解析二维码** @param path*            二维码图片地址* @return* @throws Exception*/public static String decode(String path) throws Exception {return QRCodeUtils.decode(new File(path));}
// 测试public static void main(String[] args) throws Exception {String text = "http://www.baidu.com";  //这里设置自定义网站urlString logoPath = "D:/test/timg.jpg";String destPath = "D:/test/";System.out.println(QRCodeUtils.encode(text, logoPath, destPath, true));}
}

三、测试

效果如下：

用手机扫就跳转到百度上了。。。。。。。。。。。。。。。。。

参考于：https://www.jianshu.com/p/bb76ded47d64