QRCode.java Source code

Introduction

Here is the source code for QRCode.java

Source

/*
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import ij.ImagePlus;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Map;
import java.util.List;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.UUID;
import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import org.apache.commons.io.FileUtils;

public class QRCode {

    public static void hello() {
        System.out.println("Hello");
    }

    public static String createQRCode(String arg) {
        int size = 125;
        String fileType = "png";
        File myFile = null;
        UUID uuid = UUID.nameUUIDFromBytes(arg.getBytes());

        try {
            myFile = File.createTempFile("temp-file-name", ".png");

            Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
            hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
            QRCodeWriter qrCodeWriter = new QRCodeWriter();
            BitMatrix byteMatrix = qrCodeWriter.encode(uuid.toString(), BarcodeFormat.QR_CODE, size, size, hintMap);
            int CrunchifyWidth = byteMatrix.getWidth();
            BufferedImage image = new BufferedImage(CrunchifyWidth, CrunchifyWidth, BufferedImage.TYPE_INT_RGB);
            image.createGraphics();

            Graphics2D graphics = (Graphics2D) image.getGraphics();
            graphics.setColor(Color.WHITE);
            graphics.fillRect(0, 0, CrunchifyWidth, CrunchifyWidth);
            graphics.setColor(Color.BLACK);

            for (int i = 0; i < CrunchifyWidth; i++) {
                for (int j = 0; j < CrunchifyWidth; j++) {
                    if (byteMatrix.get(i, j)) {
                        graphics.fillRect(i, j, 1, 1);
                    }
                }
            }
            ImageIO.write(image, fileType, myFile);
            //System.out.println("\n\nYou have successfully created QR Code " + myFile.getCanonicalPath());
            return myFile.getCanonicalPath();
        } catch (WriterException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return null;
    }
}