zxing读写二维码并添加Logo

先引入JAR包

<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>2.0</version>
</dependency>

import java.awt.*;  
import java.awt.image.BufferedImage;  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.OutputStream;  
import java.util.Hashtable;  
  
import javax.imageio.ImageIO;  
  
import com.google.zxing.BarcodeFormat;  
import com.google.zxing.BinaryBitmap;  
import com.google.zxing.EncodeHintType;  
import com.google.zxing.LuminanceSource;  
import com.google.zxing.ReaderException;  
import com.google.zxing.Result;  
import com.google.zxing.WriterException;  
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;  
import com.google.zxing.common.BitMatrix;  
import com.google.zxing.common.HybridBinarizer;  
import com.google.zxing.qrcode.QRCodeReader;  
import com.google.zxing.qrcode.QRCodeWriter;  
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;  
  
  
public class QrCodeCreateUtil {  
  
  
    /**  
     * 生成包含字符串信息的二维码图片----不带logo,去白框  
     *  
     * @param outputStream 文件输出流路径  
     * @param content      二维码携带信息  
     * @param qrCodeSize   二维码图片大小  
     * @param imageFormat  二维码的格式  
     * @throws WriterException  
     * @throws IOException  
     */  
    public static boolean createQrCode(OutputStream outputStream, String content,  
                                       int qrCodeSize, String imageFormat)  
            throws WriterException, IOException {  
  
        //设置二维码纠错级别Map  
        Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();  
        // 矫错级别  
        hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);  
  
        //新建QRCodeWriter  
        QRCodeWriter qrCodeWriter = new QRCodeWriter();  
  
        //创建比特矩阵(位矩阵)的QR码编码的字符串  
        BitMatrix byteMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, qrCodeSize, qrCodeSize, hintMap);  
        // 使BufferedImage勾画QRCode  (matrixWidth 是行二维码像素点)  
        int matrixWidth = byteMatrix.getWidth();  
        //新建一个内存缓存图片----图片大小为qrCodeSize-200(注：byteMatrix会存在一些白色边框，根据生成图片的大小白色边框大小不一样)  
        BufferedImage image = new BufferedImage(matrixWidth - 200, matrixWidth - 200, BufferedImage.TYPE_INT_RGB);  
        Graphics2D graphics = image.createGraphics();  
        //Graphics2D graphics = (Graphics2D) image.getGraphics();  
        graphics.setColor(Color.WHITE);  
        graphics.fillRect(0, 0, matrixWidth, matrixWidth); //填充白色在图像上  
        // 使用比特矩阵画并保存图像  
        graphics.setColor(Color.BLACK);  
        for (int i = 0; i < matrixWidth; i++) {  
            for (int j = 0; j < matrixWidth; j++) {  
                if (byteMatrix.get(i, j)) {  
                    //去掉边框  
                    graphics.fillRect(i - 100, j - 100, 1, 1); //画一个黑色像素  
                }  
            }  
        }  
        return ImageIO.write(image, imageFormat, outputStream);  
    }  
  
  
  
    /**  
     * 生成包含字符串信息的二维码图片----带logo  
     * 增加Logo其实就是两张图片叠加  
     *  
     * @param outputStream 文件输出流路径  
     * @param content      二维码携带信息  
     * @param qrCodeSize   二维码图片大小  
     * @param imageFormat  二维码的格式  
     * @throws WriterException  
     * @throws IOException  
     */  
    public static boolean createQrCodeWithLogo(OutputStream outputStream, String content,  
                                       int qrCodeSize, String imageFormat,String logoImage)  
            throws WriterException, IOException {  
  
        //设置二维码纠错级别Map  
        Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();  
        // 矫错级别  
        hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);  
  
        //新建QRCodeWriter  
        QRCodeWriter qrCodeWriter = new QRCodeWriter();  
  
        //创建比特矩阵(位矩阵)的QR码编码的字符串  
        BitMatrix byteMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, qrCodeSize, qrCodeSize, hintMap);  
        // 使BufferedImage勾画QRCode  (matrixWidth 是行二维码像素点)  
        int matrixWidth = byteMatrix.getWidth();  
        //新建一个内存缓存图片----图片大小为qrCodeSize-200(注：byteMatrix会存在一些白色边框，根据生成图片的大小白色边框大小不一样)  
        BufferedImage image = new BufferedImage(matrixWidth - 200, matrixWidth - 200, BufferedImage.TYPE_INT_RGB);  
        Graphics2D graphics = image.createGraphics();  
        //Graphics2D graphics = (Graphics2D) image.getGraphics();  
        graphics.setColor(Color.WHITE);  
        graphics.fillRect(0, 0, matrixWidth, matrixWidth); //填充白色在图像上  
        // 使用比特矩阵画并保存图像  
        graphics.setColor(Color.BLACK);  
        for (int i = 0; i < matrixWidth; i++) {  
            for (int j = 0; j < matrixWidth; j++) {  
                if (byteMatrix.get(i, j)) {  
                    //去掉边框  
                    graphics.fillRect(i - 100, j - 100, 1, 1); //画一个黑色像素  
                }  
            }  
        }  
  
        /**  
         * z  
         */  
        File logoPic = new File(logoImage);  //logo文件  
        if (!logoPic.isFile()){  
               System.out.print("Logo file is not find !");  
               System.exit(0);  
        }  
        BufferedImage logoBufferedImage = ImageIO.read(logoPic); //读取logo图片  
  
        /**  
         * 重新设置logo的大小,设置为二维码图片的20%,因为过大会盖掉二维码  
         */  
         int widthLogo =  logoBufferedImage.getWidth(null)>image.getWidth()*2/10? (image.getWidth()*2/10) : logoBufferedImage.getWidth(null);  
         int heightLogo = logoBufferedImage.getHeight(null)>image.getHeight()*2/10? (image.getHeight()*2/10) : logoBufferedImage.getHeight(null);  
  
  
        // 计算logo图片放置位置---logo放在中心  
        int x = (image.getWidth() - widthLogo) / 2;  
        int y = (image.getHeight() - heightLogo) / 2;  
  
  
  
        //开始绘制Logo到二维码图片上  
        graphics.drawImage(logoBufferedImage, x, y, widthLogo, heightLogo, null);  
        graphics.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);  
        graphics.setStroke(new BasicStroke(2));  //边框  
        graphics.setColor(Color.GREEN); //边框颜色  
        graphics.drawRect(x, y, widthLogo, heightLogo);  
  
        graphics.dispose();  
        logoBufferedImage.flush();  
        image.flush();  
  
  
        return ImageIO.write(image, imageFormat, outputStream);  
    }  
  
  
  
    /**  
     * 读二维码并输出携带的信息  
     */  
    public static void readQrCode(InputStream inputStream) throws IOException {  
        //从输入流中获取字符串信息  
        BufferedImage image = ImageIO.read(inputStream);  
  
        //将图像转换为二进制位图源  
        LuminanceSource source = new BufferedImageLuminanceSource(image);  
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));  
  
        QRCodeReader reader = new QRCodeReader();  //  
        Result result = null;  
        try {  
            result = reader.decode(bitmap);  
        } catch (ReaderException e) {  
            e.printStackTrace();  
        }  
        System.out.println(result.getText());  
    }  
  
    /**  
     * 测试代码  
     * @throws WriterException  
     */  
    public static void main(String[] args) throws IOException, WriterException {  
  
        createQrCode(new FileOutputStream(new File("E:\\qrcode.jpg")), "WE8sASDFDFSDSDF12sdfe3", 800, "JPEG");  
        createQrCodeWithLogo(new FileOutputStream(new File("E:\\qrcodeWithLogo.jpg")), "WE8sASDFDFSDSDF12sdfe3", 800, "JPEG","E:\\ling.jpg");  
  
        readQrCode(new FileInputStream(new File("E:\\qrcode.jpg")));  
        readQrCode(new FileInputStream(new File("E:\\qrcodeWithLogo.jpg")));  
    }  
  
}