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java生成二维码，并且给二维码添加logo

Java

之前有写过类似的，实现方式大致上都是一样的
【java生成二维码，并且给二维码添加logo】package com.bus.wx.action.code; import JAVA.awt.BasicStroke;import java.awt.Color;import java.awt.Graphics2D;import java.awt.RenderingHints;import java.awt.geom.RoundRectangle2D;import java.awt.image.BufferedImage;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.IOException;import java.io.InputStream;import java.util.HashMap;import java.util.Hashtable;import java.util.Map; import javax.imageio.ImageIO;import javax.servlet.ServletOutputStream; import org.springframework.context.annotation.Scope;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMApping;import org.springframework.web.bind.annotation.RequestMethod; import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder; import com.bus.plugin.wx.action.WxAction;import com.bus.wx.util.Limits;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.QRCodeWriter;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import com.lys.sys.log.Log; /** * 条形码、二维码 * @author hwj * */@Scope(value = https://www.isolves.com/it/cxkf/yy/JAVA/2019-12-12/"prototype")@Controller("Bar_Qr_Code_Action")@RequestMapping(value="plug/wx/wwz/{bcflag}/barqrcode")public class Bar_Qr_Code_Action extends WxAction{private static final int LogoPart = 4; private static final int BLACK = 0xFF000000;//用于设置图案的颜色private static final int WHITE = 0xFFFFFFFF; //用于背景色String format = "png";public static BufferedImage toBufferedImage(BitMatrix matrix) {int width = matrix.getWidth();int height = matrix.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, (matrix.get(x, y) ? BLACK : WHITE)); // image.setRGB(x, y, (matrix.get(x, y) ? Color.YELLOW.getRGB() : Color.CYAN.getRGB()));}}return image; }public BufferedImage LogoMatrix(BufferedImage matrixImage) throws IOException{/*** 读取二维码图片，并构建绘图对象*/Graphics2D g2 = matrixImage.createGraphics();int matrixWidth = matrixImage.getWidth();int matrixHeigh = matrixImage.getHeight();/*** 读取Logo图片*/String path=request.getSession().getServletContext().getRealPath("/images/logo/dzjkklog.png");BufferedImage logo = ImageIO.read(new File(path));//开始绘制图片g2.drawImage(logo,matrixWidth/5*2,matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5, null);//绘制BasicStroke stroke = new BasicStroke(5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);g2.setStroke(stroke);// 设置笔画对象//指定弧度的圆角矩形RoundRectangle2D.Float round = new RoundRectangle2D.Float(matrixWidth/5*2, matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5,20,20);g2.setColor(Color.white);g2.draw(round);// 绘制圆弧矩形//设置logo 有一道灰色边框BasicStroke stroke2 = new BasicStroke(1,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);g2.setStroke(stroke2);// 设置笔画对象RoundRectangle2D.Float round2 = new RoundRectangle2D.Float(matrixWidth/5*2+2, matrixHeigh/5*2+2, matrixWidth/5-4, matrixHeigh/5-4,20,20);g2.setColor(new Color(128,128,128));g2.draw(round2);// 绘制圆弧矩形g2.dispose();matrixImage.flush() ;return matrixImage ;}/*** 生成二维码：直接将生成的二维码传输到前台页面* @param bcflag*/ @RequestMapping(value="createQrCodes",method = RequestMethod.GET) public void createQrCodes(@PathVariable String bcflag,String dastid){String url="扫二维码出现的内容";if(url!=null&&!"".equals(url)){ServletOutputStream stream=null;try {int width=430;int height=430;stream=response.getOutputStream();QRCodeWriter writer=new QRCodeWriter();Hashtable hints = new Hashtable();hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.put(EncodeHintType.CHARACTER_SET, "utf-8");hints.put(EncodeHintType.MARGIN, 1);//设置二维码边的空度，非负数BitMatrix bitMatrix = new MultiFormatWriter().encode(url,//要编码的内容BarcodeFormat.QR_CODE,width, //条形码的宽度height, //条形码的高度hints);//BitMatrix m=writer.encode(url, BarcodeFormat.QR_CODE, height,width);BufferedImage image = toBufferedImage(bitMatrix);image = LogoMatrix(image);if (!ImageIO.write(image, format, stream)) {throw new IOException("Could not write an image of format " + format);}} catch (Exception e) {Log.in.info(e.getMessage());}finally{if(stream!=null){try {stream.flush();stream.close();} catch (IOException e) {Log.in.info(e.getMessage());}}}} }} 
原文：https://blog.csdn.net/qq_34707456/article/details/103462624




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