二维码生成与套图二维码

时间：2024-04-14 20:59:39

1：首先感谢这篇文章真正的博客：https://w.cnblogs.com/Reborn-yuan/p/10409693.html

如下代码都是根据这篇文章改进了一些地方

2：首先还是导入jar包

<!--普通二维码生成jar包-->
<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>core</artifactId>
    <version>3.3.3</version>
</dependency>

3：配置写入器以及测试主方法（默认生成地址不在C盘，这里的原因是我的电脑，系统是家庭版C盘不然轻易访问所以改成了E）

package com.ff.demo;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.util.StringUtils;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;


public class GenerateQRcode {

    /**
     *生成二维码主方法入口
     * @param qrdata 二维码的内容
     * @param generatePath 生成的路径
     * @param photoName 生成后名称
     * @param imageType 图片的类型
     */
    public static void getQRcode(String qrdata,String generatePath,String photoName,String imageType) {
        try {
            if(StringUtils.isEmpty(generatePath)){
                 generatePath = "E:\\";// 二维码默认
            }
            if(StringUtils.isEmpty(photoName)){
                photoName = UUID.randomUUID().toString();// 二维码的图片名
            }
            if(StringUtils.isEmpty(imageType)){
                imageType = "jpg";// 图片类型
            }
            MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
            Map<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            BitMatrix bitMatrix = multiFormatWriter.encode(qrdata, BarcodeFormat.QR_CODE, 400, 400, hints);
            File file1 = new File(generatePath, photoName + "." + imageType);
            if (!file1.exists() && !file1.isDirectory()) {
                file1.mkdirs();
            }
            MatrixToImageWriter.writeToFile(bitMatrix, imageType, file1);
        } catch (WriterException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**

     * 简要构造器
     * @param qrdata 二维码内容
     * @param photoName 二维码名称（可以不填，写null 生成后名称就是uuid）
     */
    public static void getQRcode(String qrdata,String photoName) {
        getQRcode(qrdata,null,photoName,null);
    }
}



class MatrixToImageWriter {
    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;

    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);
            }
        }
        return image;
    }

    public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        if (!ImageIO.write(image, format, file)) {
            throw new IOException("Could not write an image of format " + format + " to " + file);
        }
    }


}

3:新建枚举类，用来放一些常用的图片类型 也可以不用这一步，直接在测试的时候，图片类型直接写成String类型的，如：“JPG”

public enum  ImageTypeEnum {
JPG("jpg"),
PNG("png"),
BMP("bmp"),
TIF("tif"),
GIF("gif"),
PCX("pcx"),
TGA("tga"),
FPX("fpx"),
SVG("scg"),
PSD("psd"),
CDR("cdr"),
EXIF("exif");
private String type; public String getType() { return type; } ImageTypeEnum(String type) { this.type = type; } }

4：测试生成二维码

@SpringBootTest
class DemoApplicationTests {
@Test
void contextLoads() throws Exception {
    GenerateQRcode.getQRcode("https://www.cnblogs.com/aiqingbi-aifeifei/",null,"测试",ImageTypeEnum.GIF.getType());
    GenerateQRcode.getQRcode("https://www.cnblogs.com/aiqingbi-aifeifei/","E:\\","测试名称","png");
}
}

结果：

 

 

 

 

 

二：二维码中间套图片等

1：首先还是导入jar包，与上面的包是一致的

2：配置写入器

package com.ff.demo;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.springframework.util.StringUtils;

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

public class GenerateUtils {
    private static final String CHARSET = "utf-8";
    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 = 100;
    // LOGO高度
    private static final int HEIGHT = 100;

    private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        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
        GenerateUtils.insertImage(image, imgPath, needCompress);
        return image;
    }

    /**
     * 插入LOGO
     *
     * @param source       二维码图片
     * @param imgPath      LOGO图片地址
     * @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();
    }

    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content      内容
     * @param imgPath      LOGO地址
     * @param destPath     存放目录
     * @param needCompress 是否压缩LOGO
     * @throws Exception
     */
    public static String getLogoQRcode(String content, String imgPath, String destPath, boolean needCompress,String photoName,String imageType)
            throws Exception {

        BufferedImage image = GenerateUtils.createImage(content, imgPath, needCompress);

        // 随机生成二维码图片文件名
        if(StringUtils.isEmpty(destPath)){
            destPath = "E:\\";// 二维码默认
        }
        if(StringUtils.isEmpty(photoName)){
            photoName = UUID.randomUUID().toString();// 二维码的图片名
        }
        if(StringUtils.isEmpty(imageType)){
            imageType = "jpg";// 图片类型
        }
        mkdirs(destPath);
        String file = photoName+"."+imageType;
        ImageIO.write(image, FORMAT_NAME, new File(destPath,file ));
        return destPath + file;
    }

    /**
     * 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)
     *
     * @author lanyuan Email: mmm333zzz520@163.com
     * @date 2013-12-11 上午10:16:36
     * @param destPath 存放目录
     */
    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 String getLogoQRcode(String content, String imgPath,  boolean needCompress)
            throws Exception {
       String re = getLogoQRcode(content,imgPath,null,needCompress,null,null);
        return re;
    }
}

 

3：到这一步就可以测试了

@SpringBootTest
class DemoApplicationTests {

    @Test
    void contextLoads() throws Exception {
        GenerateQRcode.getQRcode("https://www.cnblogs.com/aiqingbi-aifeifei/",null,"测试",ImageTypeEnum.GIF.getType());
        GenerateQRcode.getQRcode("https://www.cnblogs.com/aiqingbi-aifeifei/",null,"测试名称","png");
    }

//测试logo方法
    @Test
    void getQR() throws Exception{
//第一个路径是logo图片，第二个是生成的路径  生成的路径在简要方法中可以不写，默认在我电脑是E盘
        GenerateUtils.getLogoQRcode("https://www.cnblogs.com/aiqingbi-aifeifei/","E:\\MyPhotos\\mongchong.jpg","E:\\",true,"测试套图",ImageTypeEnum.JPG.getType());

        GenerateUtils.getLogoQRcode("https://www.cnblogs.com/aiqingbi-aifeifei/","E:\\MyPhotos\\mongchong.jpg",true);
    }


}

结果如下：

 

 

 

至此，生成测试已经完毕，大家可以参考一下，代码复制后，改个包名，就可以直接生成了，但是代码中的E盘，可以参考本机的盘，写个C  D应该都没问题

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