package net.viralpatel.qrcode;

/**
*
* @author RGONZALEZ
*/
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Writer;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import java.io.FileNotFoundException;
import java.io.IOException;
public class GenerateQRCode {

/**
* @param args the command line arguments
*/
// Image properties
private static final int qr_image_width = 400;
private static final int qr_image_height = 400;
private static final String IMAGE_FORMAT = "png";
private static final String IMG_PATH = "qrcode.png";
// Let's do it
public static void main(String[] args) throws Exception {
// URL to be encoded

String data = "http://www.google.com";

// Encode URL in QR format
BitMatrix matrix;
Writer writer = new QRCodeWriter();
try {

matrix = writer.encode(data, BarcodeFormat.QR_CODE, qr_image_width, qr_image_height);

} catch (WriterException e) {
e.printStackTrace(System.err);
return;
}

// Create buffered image to draw to
BufferedImage image = new BufferedImage(qr_image_width,
qr_image_height, BufferedImage.TYPE_INT_RGB);

// Iterate through the matrix and draw the pixels to the image
for (int y = 0; y < qr_image_height; y++) {
for (int x = 0; x < qr_image_width; x++) {
int grayValue = (matrix.get(x, y) ? 0 : 1) & 0xff;
image.setRGB(x, y, (grayValue == 0 ? 0 : 0xFFFFFF));
}
}
try (FileOutputStream qrCode = new FileOutputStream(IMG_PATH)) {
ImageIO.write(image, IMAGE_FORMAT, qrCode);
}

}
}