What is the method of generating QR code by zxing

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POM

Com.google.zxing core 3.1.0 com.google.zxing javase 3.1.0

Utils

Package com.egl.utils;import java.awt.BasicStroke;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.Shape;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;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;import com.google.zxing.BinaryBitmap;import com.google.zxing.DecodeHintType;import com.google.zxing.EncodeHintType Import com.google.zxing.MultiFormatReader;import com.google.zxing.MultiFormatWriter;import com.google.zxing.Result;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;/** * lee * / public class QRCodeUtil {private static final String CHARSET = "utf-8"; private static final String FORMAT = "JPG" / / QR code size private static final int QRCODE_SIZE = 300; / / LOGO width private static final int LOGO_WIDTH = 60; / / LOGO height private static final int LOGO_HEIGHT = 60; private static BufferedImage createImage (String content, String logoPath, boolean needCompress) throws Exception {Hashtable hints = new Hashtable (); 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 (logoPath == null || "".equals(logoPath)) { return image; } // 插入图片 QRCodeUtil.insertImage(image, logoPath, needCompress); return image; } /** * 插入LOGO * * @param source * 二维码图片 * @param logoPath * LOGO图片地址 * @param needCompress * 是否压缩 * @throws Exception */ private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws Exception { File file = new File(logoPath); if (!file.exists()) { throw new Exception("logo file not found."); } Image src = ImageIO.read(new File(logoPath)); int width = src.getWidth(null); int height = src.getHeight(null); if (needCompress) { // 压缩LOGO if (width >