java生成我二维码

pom文件

		<!--生成二维码-->
		<dependency>
			<groupId>com.google.zxing</groupId>
			<artifactId>core</artifactId>
			<version>3.3.0</version>
		</dependency>
		<dependency>
			<groupId>com.google.zxing</groupId>
			<artifactId>javase</artifactId>
			<version>3.3.0</version>
		</dependency>

工具类

package org.jeecg.modules.demo.sy.util;

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 javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Hashtable;

/**
 * @Author: [email protected]
 * @Date: 2020/7/13 5:20 下午
 * @Description: 二维码工具类
 */


public class QRCodeUtil {
     

    //编码
    private static final String CHARSET = "utf-8";
    //文件格式
    private static final String FORMAT_NAME = "JPG";
    // 二维码尺寸
    private static final int QRCODE_SIZE = 300;
    // LOGO宽度
    private static final int WIDTH = 60;
    // LOGO高度
    private static final int HEIGHT = 60;

    /**
     * 生成二维码
     * @param content 内容
     * @param imgPath logo
     * @param needCompress 是否需要压缩
     * @return java.awt.image.BufferedImage
     * @throws Exception
     */
    private static BufferedImage createImage(String content, String imgPath, 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 (imgPath == null || "".equals(imgPath)) {
     
            return image;
        }
        // 插入图片
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }

    /**
     * 插入logo
     * @param source 二维码图片
     * @param imgPath logo路径
     * @param needCompress 是否压缩
     * @throws Exception
     */
    private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
     
        File file = new File(imgPath);
        if (!file.exists()) {
     
            System.err.println("" + imgPath + "   该文件不存在！");
            return;
        }
        Image src = ImageIO.read(new File(imgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) {
      // 压缩LOGO
            if (width > WIDTH) {
     
                width = WIDTH;
            }
            if (height > HEIGHT) {
     
                height = HEIGHT;
            }
            Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        int x = (QRCODE_SIZE - width) / 2;
        int y = (QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }

    public static void mkdirs(String destPath) {
     
        File file = new File(destPath);
        // 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
        if (!file.exists() && !file.isDirectory()) {
     
            file.mkdirs();
        }
    }


    public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
     
        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
        mkdirs(destPath);
        // String file = new Random().nextInt(99999999)+".jpg";
        // ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
        ImageIO.write(image, FORMAT_NAME, new File(destPath));
    }

    /**
     * 生成二维码，获得到输入流 log内嵌
     * @param content 内容
     * @param imgPath logo路径
     * @param output 输入流
     * @param needCompress 是否压缩
     * @throws Exception
     */
    public static void encode(String content, String imgPath, OutputStream output, boolean needCompress)
            throws Exception {
     
        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
        ImageIO.write(image, FORMAT_NAME, output);
    }

    /**
     * 获取指定的logo文件输入流
     * @param logoPath logo路径
     * @return java.io.InputStream
     */
    public static InputStream getResourceAsStream(String logoPath) {
     
        return QRCodeUtil.class.getResourceAsStream(logoPath);
    }

    /**
     * 将要解析的二维码的存放路径
     * @param file 要解析的二维码
     * @return
     * @throws Exception
     */
    public static String decode(File file) throws Exception {
     
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
     
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable hints = new Hashtable();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }

    /**
     * 解析二维码
     * @param path 要解析的二维码路径
     * @return
     * @throws Exception
     */
    public static String decode(String path) throws Exception {
     
        return QRCodeUtil.decode(new File(path));
    }
}

调用方法

package org.jeecg.modules.demo.sy.util;


/**
 * @Author: [email protected]
 * @Date: 2020/7/13 5:20 下午
 * @Description:
 */
public class TestApp {
     
    public static void main(String[] args) throws Exception {
     
        // 存放在二维码中的内容
        //String text = "https://www.cnblogs.com/zhangruifeng/p/13295961.html";
        String text = "C:/Users/fisherman/Desktop/基于非靶向代谢组学技术的葡萄酒代谢组检测报告-已转换.html";
        // 嵌入二维码的图片路径
        String imgPath = "C:/Users/fisherman/Desktop/login.jpg";
        // 生成的二维码的路径及名称
        String destPath =  "C:/Users/fisherman/Desktop/MyQRCode.png";
        //生成二维码
        QRCodeUtil.encode(text, imgPath, destPath, true);
        // 解析二维码
        String str = QRCodeUtil.decode(destPath);
        // 打印出解析出的内容
        System.out.println(str);
    }
}