private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "JPG";
// QR code size
private static final int QRCODE_SIZE = 50;
// Logo width
private static final int WIDTH = 10;
// Logo height
private static final int HEIGHT = 10;
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;
}
// insert image
QRCodeUtil.insertImage(image, imgPath, needCompress);
return image;
}
/**
* Insert LOGO
*
* @param source
* QR code picture
* @param imgPath
* LOGO picture address
* @param needCompress
* Whether to compress
* @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+" The file does not exist!");
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // Compress the 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); // draw the reduced image
g.dispose();
src = image;
}
// insert 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();
}
/**
* Generate QR code (embedded LOGO)
*
* @param content
* content
* @param imgPath
* Logo address
* @param destPath
* storage directory
* @param needCompress
* Whether to compress LOGO
* @throws Exception
*/
public static String 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));
return file;
}
/**
* When the folder does not exist, mkdirs will automatically create multiple directories, which is different from mkdir. (mkdir will throw an exception if the parent directory does not exist)
* @author lanyuan
* Email: [email protected]
* @date 2013-12-11 10:16:36 AM
* @param destPath storage directory
*/
public static void mkdirs(String destPath) {
File file =new File(destPath);
//When the folder does not exist, mkdirs will automatically create a multi-layer directory, which is different from mkdir. (mkdir will throw an exception if the parent directory does not exist)
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}
/**
* Generate QR code (embedded LOGO)
*
* @param content
* content
* @param imgPath
* Logo address
* @param destPath
* storage address
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath)
throws Exception {
QRCodeUtil.encode(content, imgPath, destPath, false);
}
/**
* Generate QR code
*
* @param content
* content
* @param destPath
* storage address
* @param needCompress
* Whether to compress LOGO
* @throws Exception
*/
public static void encode(String content, String destPath,
boolean needCompress) throws Exception {
QRCodeUtil.encode(content, null, destPath, needCompress);
}
/**
* Generate QR code
*
* @param content
* content
* @param destPath
* storage address
* @throws Exception
*/
public static void encode(String content, String destPath) throws Exception {
QRCodeUtil.encode(content, null, destPath, false);
}
/**
* Generate QR code (embedded LOGO)
*
* @param content
* content
* @param imgPath
* Logo address
* @param output
* output stream
* @param needCompress
* Whether to compress LOGO
* @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);
}
/**
* Generate QR code
*
* @param content
* content
* @param output
* output stream
* @throws Exception
*/
public static void encode(String content, OutputStream output)
throws Exception {
QRCodeUtil.encode(content, null, output, false);
}
/**
* Parse QR code
*
* @param file
* QR code picture
* @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<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
result = new MultiFormatReader().decode(bitmap, hints);
String resultStr = result.getText();
return resultStr;
}
/**
* Parse QR code
*
* @param path
* QR code picture address
* @return
* @throws Exception
*/
public static String decode(String path) throws Exception {
return QRCodeUtil.decode(new File(path));
}