zxing springboot 二維碼

zxing框架生成帶log的二維碼

新建一個springboot項目
pom.xml中加入依賴

<!-- zxing -->
<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>core</artifactId>
    <version>3.3.0</version>
</dependency>
<dependency>
    <groupId>net.glxn</groupId>
    <artifactId>qrgen</artifactId>
    <version>1.4</version>
</dependency>
<!-- zxing -->
<!-- servlet  這一段經過測試沒有什麼用 -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
</dependency>
<!-- servlet -->

書寫二維碼生成工具類

package com.example.demo;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.NotFoundException;
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.decoder.ErrorCorrectionLevel;

/**
 * 二維碼生成和解析工具類
 * 
 * @author Administrator
 *
 */
public class QRCodeUtil {

    // 二維碼顏色==黑色
    private static final int BLACK = 0xFF000000;
    // 二維碼顏色==白色
    private static final int WHITE = 0xFFFFFFFF;
    // 二維碼圖片格式==jpg和png兩種
    private static final List<String> IMAGE_TYPE = new ArrayList<String>();

    static {
        IMAGE_TYPE.add("jpg");
        IMAGE_TYPE.add("png");
    }

    /**
     * zxing方式生成二維碼
     * 注意：
     * 1,文本生成二維碼的方法獨立出來,返回image流的形式,可以輸出到頁面
     * 2,設置容錯率爲最高,一般容錯率越高,圖片越不清晰, 但是隻有將容錯率設置高一點才能兼容logo圖片
     * 3,logo圖片默認佔二維碼圖片的20%,設置太大會導致無法解析 
     * @param content 二維碼包含的內容，文本或網址  
     * @param path 生成的二維碼圖片存放位置
     * @param size 生成的二維碼圖片尺寸 可以自定義或者默認（250） 
     * @param logoPath logo的存放位置
     */
    public static boolean zxingCodeCreate(String content, String path, Integer size,String logoPath) {

        try {
            String imageType = path.substring(path.lastIndexOf(".") + 1).toLowerCase();
            if (!IMAGE_TYPE.contains(imageType)) {
                return false;
            }

            //獲取二維碼流的形式，寫入到目錄文件中
            BufferedImage image = getBufferedImage(content,size,logoPath);

            File file = new File(path);
            if (!file.exists()) {
                file.mkdirs();
            }
            ImageIO.write(image, imageType, file);

            return true;

        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }

    }

    /**
     * 二維碼流的形式，包含文本內容
     * @param content 二維碼文本內容
     * @param size 二維碼尺寸
     * @param logoPath logo的存放位置
     * @return
     */
    public static BufferedImage getBufferedImage (String content,Integer size,String logoPath) {

        if (size == null || size <= 0) {
            size = 250;
        }

        BufferedImage image = null;
        try {
            // 設置編碼字符集
            Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
            //設置編碼
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            //設置容錯率最高
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);  
            hints.put(EncodeHintType.MARGIN, 1);
            // 1、生成二維碼
            MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
            BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, size, size, hints);

            // 2、獲取二維碼寬高
            int codeWidth = bitMatrix.getWidth();
            int codeHeight = bitMatrix.getHeight();

            // 3、將二維碼放入緩衝流
            image = new BufferedImage(codeWidth, codeHeight, BufferedImage.TYPE_INT_RGB);

            for (int i = 0; i < codeWidth; i++) {
                for (int j = 0; j < codeHeight; j++) {
                    // 4、循環將二維碼內容定入圖片
                    image.setRGB(i, j, bitMatrix.get(i, j) ? BLACK : WHITE);
                }
            }

            //判斷是否寫入logo圖片
            if (logoPath != null && !"".equals(logoPath)) {
                File logoPic = new File(logoPath);
                if (logoPic.exists()) {
                    Graphics2D g = image.createGraphics();
                    BufferedImage logo = ImageIO.read(logoPic);
                    int widthLogo = logo.getWidth(null) > image.getWidth() * 2 / 10 ? 
                            (image.getWidth() * 2 / 10) : logo.getWidth(null);
                    int heightLogo = logo.getHeight(null) > image.getHeight() * 2 / 10 ? 
                            (image.getHeight() * 2 / 10) : logo.getHeight(null);
                    int x = (image.getWidth() - widthLogo) / 2; 
                    int y = (image.getHeight() - heightLogo) / 2;

                    // 開始繪製圖片
                    g.drawImage(logo, x, y, widthLogo, heightLogo, null);
                    g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
                    //邊框寬度
                    g.setStroke(new BasicStroke(2));
                    //邊框顏色
                    g.setColor(Color.WHITE);
                    g.drawRect(x, y, widthLogo, heightLogo);

                    g.dispose();
                    logo.flush();
                    image.flush();
                }
            }

        } catch (WriterException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return image;

    }


    /**
     * 給二維碼圖片添加Logo
     * 
     * @param qrPic 二維碼圖片
     * @param logoPic logo圖片
     * @param path 合成後的圖片存儲目錄
     */
    public static boolean zxingCodeCreate(File qrPic, File logoPic,String path) {
        try {
            String imageType = path.substring(path.lastIndexOf(".") + 1).toLowerCase();
            if (!IMAGE_TYPE.contains(imageType)) {
                return false;
            }
            if (!qrPic.isFile() && !logoPic.isFile()) {
                return false;
            }
            /**
             * 讀取二維碼圖片，並構建繪圖對象
             */
            BufferedImage image = ImageIO.read(qrPic);
            Graphics2D g = image.createGraphics();

            /**
             * 讀取Logo圖片
             */
            BufferedImage logo = ImageIO.read(logoPic);
            /**
             * 設置logo的大小,最多20%0
             */
            int widthLogo = logo.getWidth(null) > image.getWidth() * 2 / 10 ? 
                    (image.getWidth() * 2 / 10) : logo.getWidth(null);
            int heightLogo = logo.getHeight(null) > image.getHeight() * 2 / 10 ? 
                    (image.getHeight() * 2 / 10) : logo.getHeight(null);

            // 計算圖片放置位置，默認在中間
            int x = (image.getWidth() - widthLogo) / 2; 
            int y = (image.getHeight() - heightLogo) / 2;

            // 開始繪製圖片
            g.drawImage(logo, x, y, widthLogo, heightLogo, null);
            g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
            //邊框寬度
            g.setStroke(new BasicStroke(2));
            //邊框顏色
            g.setColor(Color.WHITE);
            g.drawRect(x, y, widthLogo, heightLogo);

            g.dispose();
            logo.flush();
            image.flush();

            File newFile = new File(path);
            if (!newFile.exists()) {
                newFile.mkdirs();
            }
            ImageIO.write(image, imageType,newFile);

            return true;

        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }

    }

    /**
     * zxing方式生成二維碼的解析方法
     * @param path 二維碼圖片目錄
     * @return
     */
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static Result zxingCodeAnalyze(String path) {
        try {
            MultiFormatReader formatReader = new MultiFormatReader();
            File file = new File(path);
            if (file.exists()) {
                BufferedImage image = ImageIO.read(file);
                LuminanceSource source = new BufferedImageLuminanceSource(image);
                Binarizer binarizer = new HybridBinarizer(source);
                BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
                Map hints = new HashMap();
                hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
                Result result = formatReader.decode(binaryBitmap, hints);
                return result;
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (NotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

}

調用工具類

package com.example.demo;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.google.zxing.Result;


@RestController
public class QrcodeController {

    @RequestMapping("/productcode")
    public void productcode() {

        QRCodeUtil.zxingCodeCreate("http://www.runoob.com/html/html-images.html", "L:\\cc.jpg",500,"C:\\Users\\LMS\\Desktop\\img\\0101.jpg");
    }

    @RequestMapping("/analysiscode")
    public void analysiscode() {

        Result result = QRCodeUtil.zxingCodeAnalyze("L:\\aa.jpg");
        System.err.println("二維碼解析內容："+result.toString());
    }

}

端口設定

server.port=1245

啓動類

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Qrcode21Application {

    public static void main(String[] args) {
        SpringApplication.run(Qrcode21Application.class, args);
    }
}

測試

生成二維碼地址：http://192.168.31.32:1245/productcode 會在對應的目錄下生成二維碼（可以穿logo也可以不傳logo）
解析二維碼地址：http://192.168.31.32:1245/analysiscode

控制檯輸出：
二維碼解析內容：http://www.baidu.com

參考文章

zxing生成和解析帶logo二維碼： https://blog.csdn.net/MyNoteBlog/article/details/71054011
谷歌zxing實現二維碼生成和解析_http://kesun-shy.iteye.com/blog/2154169 ：https://blog.csdn.net/a363722188/article/details/51724768

備註

二維碼在瀏覽器的顯示未實現，但是可以通過下面代碼直接獲取二維碼圖片

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

this is a photo
<img  src= "L:\aa.jpg" />

</body>
</html>

補充

在線生成和下載二維碼（兩者不能共存）
servlet 類

package com.example.demo;

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;

import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;


/**
 * 網頁在線生成二維碼
 * 下載二維碼和在線生成二維碼不能共存
 */
public class QRcodeServlet extends HttpServlet{

    private static final long serialVersionUID = 4905664814789638877L;

    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        resp.setCharacterEncoding("utf-8");
        //生成二維碼圖片  =========== 文字內容 ， 二維碼長度，logo的存放位置
        BufferedImage bufImage = QRCodeUtil.getBufferedImage("我的二維碼201", 500,"C:\\Users\\LMS\\Desktop\\img\\0303.jpg");

        //直接打開圖片
        resp.setContentType("image/jpg");
        //直接下載圖片===下載後圖片存放的位置：Windows系統有一個默認的位置，只需要一個文件名即可
//      resp.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode("qq.png", "UTF-8"));
        //將圖片寫出到瀏覽器
        OutputStream out = resp.getOutputStream();
        ImageIO.write(bufImage, "jpg", out);
        out.close();
    }
}

controller類

package com.example.demo;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.google.zxing.Result;


@RestController
public class QrcodeController {

    @RequestMapping("/onlineCode")
    public void brower(HttpServletRequest req, HttpServletResponse resp) {

        QRcodeServlet qRcodeServlet = new QRcodeServlet();
        try {

            qRcodeServlet.doGet(req, resp);
        } catch (ServletException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}

瀏覽器訪問便可知道生成的二維碼：http://192.168.31.32:1245/onlineCode

zxing springboot 二維碼

zxing框架生成帶log的二維碼

測試

參考文章

備註

補充

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