随笔博文

zxing 二维码、带logo二维码生成

2022-11-21 12:53:45 michael007js 1203

普通二维码生成

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class ZxingEncoderUtil {

    /**
     * 生成二维码
     * @param filePath       文本文件路径(文本需以UTF-8)
     * @param imgFormate     指定生成的二维码图片的后缀名
     * @param width          指定生成的二维码图片的宽度
     * @param height           指定生成的二维码图片的高度
     */
    public void createTwoDimensionalCode(String filePath, String imgFormate, int width, int height) {
        File file = new File(filePath);
        StringBuffer contents = new StringBuffer("");
        //读取文本文件内容到 contents
        try {
            InputStream is = new FileInputStream(file);
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            try {
                String temp = br.readLine();
                while(temp != null) {
                    contents.append(temp+"\r\n");
                    temp = br.readLine();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        //得到图片该存放路径
        String imgPath = file.getParent();
        //得到文件该设置的名字
        String imgName = file.getName();
        int endIndex = imgName.lastIndexOf(".");
        imgName = imgName.substring(0, endIndex);

        File imageFile = new File(imgPath, imgName+"."+imgFormate);
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        // 指定纠错等级
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
        // 指定编码格式
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
        try {
            BitMatrix bitMatrix = new MultiFormatWriter().encode(contents.toString(),BarcodeFormat.QR_CODE, width, height, hints);
            MatrixToImageWriter.writeToPath(bitMatrix, imgFormate, imageFile.toPath());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * @param args
     */
    public static void main(String[] args) {

        String filePath = args[0];   //文本文件路径(文本需以UTF-8)
        String imgFormate = args[1];  //指定生成的二维码图片的后缀名
        int width = Integer.parseInt(args[2]); //指定生成的二维码图片的宽度
        int height = Integer.parseInt(args[3]); //指定生成的二维码图片的高度
        new ZxingEncoderUtil().createTwoDimensionalCode(filePath, imgFormate, width, height);
    }
}

带logo二维码

import com.google.zxing.common.BitMatrix;

import java.io.File;
import java.io.IOException;

public class CreatQRCodeImg {

    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;

    /**
     *  最终调用该方法生成二维码图片
     * @param url 要生成二维码的url
     * @param imgPath 二维码生成的绝对路径
     * @param logoPath 二维码中间logo绝对地址
     * @throws Exception
     */
    public static void get2CodeImage(String url,String imgPath,String logoPath) throws Exception{
        String format = "png";
        Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 300, 300, hints);
        File qrcodeFile = new File(imgPath);
        CreatQRCodeImg.writeToFile(bitMatrix, format, qrcodeFile, logoPath);
    }

    /**
     *
     * @param matrix 二维码矩阵相关
     * @param format 二维码图片格式
     * @param file 二维码图片文件
     * @param logoPath logo路径
     * @throws IOException
     */
    public static void writeToFile(BitMatrix matrix, String format, File file, String logoPath) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        Graphics2D gs = image.createGraphics();

        //载入logo
        Image img = ImageIO.read(new File(logoPath));
        gs.drawImage(img, 125, 125, null);
        gs.dispose();
        img.flush();
        if(!ImageIO.write(image, format, file)){
            throw new IOException("Could not write an image of format " + format + " to " + file);
        }
    }

    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 main(String[] args) {
        try {
            get2CodeImage("www.baidu.com","d:\\test\\logotest\\logocode.jpg","d:\\test\\logotest\\logo.jpg");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
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