微信生成带参二维码,加彩色logo

本文介绍如何使用zXing库生成带有Logo的二维码图片,并详细解释了二维码生成、添加Logo及上传过程。

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1.使用zXing qrcode

2.pom文件

<!-- 二维码生成 -->
<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>core</artifactId>
    <version>3.2.0</version>
</dependency>
<dependency>
 <groupId>com.google.zxing</groupId>
  <artifactId>javase</artifactId>
  <version>3.3.0</version>
</dependency>
3.获取input流,转换成bufferedImage,然后使用zXing qrcode解析bufferedImage。解析后就可以得到二维码内容
    public String getQrCode(String ticket,String id,String channelId) throws Exception{
    LOGGER.info("ITouGuQrCodeService getQrCode request ticket:{}",ticket);
    try {
        String wxQrUrl = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket="+HttpRequestUtil.urlEncode(ticket, HttpRequestUtil.DEFAULT_ENCODING);
        URL getUrl = new URL(wxQrUrl);
        // 根据拼凑的URL,打开连接,URL.openConnection函数会根据URL的类型,
        // 返回不同的URLConnection子类的对象,这里URL是一个http,因此实际返回的是HttpURLConnection
        HttpURLConnection connection = (HttpURLConnection) getUrl.openConnection();
        connection.setConnectTimeout(30000);
        connection.setReadTimeout(30000);
        // 进行连接,但是实际上get request要在下一句的connection.getInputStream()函数中才会真正发到
        connection.connect();
        // 取得输入流,并使用Reader读取
        InputStream input = connection.getInputStream();
        //获取content,这一步很重要!!!!!!!!!!!!
        String decode_url = ZXingCodeUtil.decode(HttpRequestUtil.readStreamToImage(input));
        //获取字节流
        byte[] bytes = new ZXingCodeUtil().getLogoQRCode(decode_url,"");
        //上传至文件服务器
        String suffix = ".png";
        String url = uploadFileUrl + "/api/1/file/corp/upload";
        String extensionName = System.currentTimeMillis() + suffix;
        String filename = UUID.randomUUID().toString().replace("-", "") + extensionName;
        String result = HttpRequestUtil.transferImg(bytes, url, filename);
        LOGGER.info("文件上传返回路径:{}", result);
        JSONObject json = JsonConvertor.jsonToObject(result,JSONObject.class);
        if(json.containsKey("data")){
            return (String) json.get("data");
        }
    } catch (Exception e) {
        LOGGER.info("ITouGuQrCodeService getTicket error e:{}",e.toString());
    }
    return "error";
}
4.
package com.yskj.articledata.framework.utils;

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 org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.util.HashMap;
import java.util.Map;

/********************************************************
类名:ZXingCode
功能:工具类
作者:qiucx 201784修改记录:
*          日期                 修改人                 修改说明
********************************************************/
public class ZXingCodeUtil {

    private static final Logger LOGGER = LoggerFactory.getLogger(ZXingCodeUtil.class);

   private static final int QRCOLOR = 0xFF000000;   //默认是黑色
    private static final int BGWHITE = 0xFFFFFFFF;   //背景颜色
    private static final String path = "D:/images/";

  
    /********************************************************
函数名: getLogoQRCode
功能 : 生成带logo的二维码图片
    作者 : qiucx 201784    参数表: @param qrUrl
参数表: @param productName
参数表: @return    
返回值: String    
修改记录:
    *          日期                 修改人                 修改说明
    ********************************************************/
    public static byte[] getLogoQRCode(String qrUrl,String productName)
    {
        //filePath是二维码logo的路径,但是实际中我们是放在项目的某个路径下面的,所以路径用上面的,把下面的注释就好
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        String filePath = request.getSession().getServletContext().getRealPath("/") + "WEB-INF/classes/images/logo.png";
        //String filePath = path + "logo.png";  //TODO
        String content = qrUrl;
        LOGGER.info("ZXingCodeUtil.getLogoQRCode filePath:{}",filePath);
        try
        {
            ZXingCodeUtil zp = new ZXingCodeUtil();
            BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType());
            return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName);
        }
        catch (Exception e)
        {
            LOGGER.error("ZXingCodeUtil.getLogoQRCode error:{}",e.toString());
        }
        return null;
    }

    
    /********************************************************
函数名: addLogo_QRCode
功能 : 给二维码图片添加Logo
作者 : qiucx 201784    参数表: @param bim
参数表: @param logoPic
参数表: @param logoConfig
参数表: @param productName
参数表: @return    
返回值: String    
修改记录:
    *          日期                 修改人                 修改说明
    ********************************************************/
    public byte[] addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName)
    {
        try
        {
            /**
             * 读取二维码图片,并构建绘图对象
             */
            BufferedImage image = bim;
            Graphics2D g = image.createGraphics();

            /**
             * 读取Logo图片
             */
            BufferedImage logo = ImageIO.read(logoPic);
            /**
             * 设置logo的大小,本人设置为二维码图片的20%,因为过大会盖掉二维码
             */
            int widthLogo = logo.getWidth(null)>image.getWidth()*3/10?(image.getWidth()*3/10):logo.getWidth(null), 
                heightLogo = logo.getHeight(null)>image.getHeight()*3/10?(image.getHeight()*3/10):logo.getWidth(null);

            /**
             * logo放在中心
             */
             int x = (image.getWidth() - widthLogo) / 2;
             int y = (image.getHeight() - heightLogo) / 2;
             /**
             * logo放在右下角
             *  int x = (image.getWidth() - widthLogo);
             *  int y = (image.getHeight() - heightLogo);
             */

            //开始绘制图片
            g.drawImage(logo, x, y, widthLogo, heightLogo, null);
//            g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
//            g.setStroke(new BasicStroke(logoConfig.getBorder()));
//            g.setColor(logoConfig.getBorderColor());
//            g.drawRect(x, y, widthLogo, heightLogo);
            g.dispose();

            //把商品名称添加上去,商品名称不要太长哦,这里最多支持两行。太长就会自动截取啦
            if (productName != null && !productName.equals("")) {
                //新的图片,把带logo的二维码下面加上文字
                BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);
                Graphics2D outg = outImage.createGraphics();
                //画二维码到新的面板
                outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
                //画文字到新的面板
                outg.setColor(Color.BLACK); 
                outg.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号 
                int strWidth = outg.getFontMetrics().stringWidth(productName);
                if (strWidth > 399) {
//                  //长度过长就截取前面部分
//                  outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); //画文字
                    //长度过长就换行
                    String productName1 = productName.substring(0, productName.length()/2);
                    String productName2 = productName.substring(productName.length()/2, productName.length());
                    int strWidth1 = outg.getFontMetrics().stringWidth(productName1);
                    int strWidth2 = outg.getFontMetrics().stringWidth(productName2);
                    outg.drawString(productName1, 200  - strWidth1/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 );
                    BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR);
                    Graphics2D outg2 = outImage2.createGraphics();
                    outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null);
                    outg2.setColor(Color.BLACK); 
                    outg2.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号 
                    outg2.drawString(productName2, 200  - strWidth2/2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight())/2 + 5 );
                    outg2.dispose(); 
                    outImage2.flush();
                    outImage = outImage2;
                }else {
                    outg.drawString(productName, 200  - strWidth/2 , image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 ); //画文字 
                }
                outg.dispose(); 
                outImage.flush();
                image = outImage;
            }
            logo.flush();
            image.flush();
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            baos.flush();
            ImageIO.write(image, "png", baos);

            //二维码生成的路径,但是实际项目中,我们是把这生成的二维码显示到界面上的,因此下面的折行代码可以注释掉
            //可以看到这个方法最终返回的是这个二维码的imageBase64字符串
            //前端用 <img src="https://img-blog.csdnimg.cn/2022010709134950101.png"/>  其中${imageBase64QRCode}对应二维码的imageBase64字符串
            //ImageIO.write(image, "png", new File(path+"TDC-" + new Date().getTime() + "testLogo.png")); //TODO

            String imageBase64QRCode =  Base64.encodeBase64URLSafeString(baos.toByteArray());
            byte[] bytes = baos.toByteArray();
            baos.close();
            return bytes;
        }
        catch (Exception e)
        {
            LOGGER.error("ZXingCodeUtil.addLogo_QRCode error:{}",e.toString());
        }
        return null;
    }


    
    /********************************************************
函数名: fileToBufferedImage
功能 : 构建初始化二维码
    作者 : qiucx 201784    参数表: @param bm
参数表: @return    
返回值: BufferedImage    
修改记录:
    *          日期                 修改人                 修改说明
    ********************************************************/
    public BufferedImage fileToBufferedImage(BitMatrix bm)
    {
        BufferedImage image = null;
        try
        {
            int w = bm.getWidth(), h = bm.getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

            for (int x = 0; x < w; x++)
            {
                for (int y = 0; y < h; y++)
                {
                    image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);
                }
            }

        }
        catch (Exception e)
        {
            LOGGER.error("ZXingCodeUtil.fileToBufferedImage error:{}",e.toString());
        }
        return image;
    }

 
    /********************************************************
函数名: getQR_CODEBufferedImage
功能 : 生成二维码bufferedImage图片
    作者 : qiucx 201784    参数表: @param content
参数表: @param barcodeFormat
参数表: @param width
参数表: @param height
参数表: @param hints
参数表: @return    
返回值: BufferedImage    
修改记录:
    *          日期                 修改人                 修改说明
    ********************************************************/
    public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints)
    {
        MultiFormatWriter multiFormatWriter = null;
        BitMatrix bm = null;
        BufferedImage image = null;
        try
        {
            multiFormatWriter = new MultiFormatWriter();
            // 参数顺序分别为:编码内容,编码类型,生成图片宽度,生成图片高度,设置参数
            bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);
            int w = bm.getWidth();
            int h = bm.getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

            // 开始利用二维码数据创建Bitmap图片,分别设为黑(0xFFFFFFFF)白(0xFF000000)两色
            for (int x = 0; x < w; x++)
            {
                for (int y = 0; y < h; y++)
                {
                    image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
                }
            }
        }
        catch (WriterException e)
        {
            LOGGER.error("ZXingCodeUtil.getQR_CODEBufferedImage error:{}",e.toString());
        }
        return image;
    }

  
    /********************************************************
函数名: getDecodeHintType
功能 : 设置二维码的格式参数
    作者 : qiucx 201784    参数表: @return    
返回值: Map<EncodeHintType,Object>    
修改记录:
    *          日期                 修改人                 修改说明
    ********************************************************/
    public Map<EncodeHintType, Object> getDecodeHintType()
    {
        // 用于设置QR二维码参数
        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
        // 设置QR二维码的纠错级别(H为最高级别)具体级别信息
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        // 设置编码方式
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.MARGIN, 0);
        hints.put(EncodeHintType.MAX_SIZE, 350);
        hints.put(EncodeHintType.MIN_SIZE, 100);
        return hints;
    }

    /**
     * 解析图像
     */
    public static String decode(BufferedImage image) {
        try {
            LuminanceSource source = new BufferedImageLuminanceSource(image);
            Binarizer binarizer = new HybridBinarizer(source);
            BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
            Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
            hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
            Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码
            LOGGER.info("ZXingCodeUtil.decode result:{}",JsonConvertor.toJsonString(result));
            return result.getText();
        } catch (Exception e) {
            LOGGER.error("ZXingCodeUtil.decode error:{}",e.toString());
        }
        return null;
    }
}
5.
package com.yskj.articledata.framework.utils;

import java.awt.Color;

/********************************************************
类名:LogoConfig
功能:logo配置类
作者:qiucx 201784修改记录:
*          日期                 修改人                 修改说明
********************************************************/
public class LogoConfig {

   // logo默认边框颜色
    public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
    // logo默认边框宽度
    public static final int DEFAULT_BORDER = 2;
    // logo大小默认为照片的1/5
    public static final int DEFAULT_LOGOPART = 5;

    private final int border = DEFAULT_BORDER;
    private final Color borderColor;
    private final int logoPart;

    /**
     * Creates a default config with on color {@link #BLACK} and off color
     * {@link #WHITE}, generating normal black-on-white barcodes.
     */
    public LogoConfig()
    {
        this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
    }

    public LogoConfig(Color borderColor, int logoPart)
    {
        this.borderColor = borderColor;
        this.logoPart = logoPart;
    }

    public Color getBorderColor()
    {
        return borderColor;
    }

    public int getBorder()
    {
        return border;
    }

    public int getLogoPart()
    {
        return logoPart;
    }
}
6.附效果图
7.zXing网上有demo的,可以自己找

                
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