My linux world » Java – QRCode

Java - QRCode


If you use maven, add this to your pom.xml :



// Set parameters
String stringToEncode="Hello World!";
int imageWith=250;
int imageHeight=250;
String imageFormat="PNG";
File outputFile=new File("/tmp","myqrcode.png");
// Encode
Map<EncodeHintType, Object> hintMap = new EnumMap<>(EncodeHintType.class);
hintMap.put(EncodeHintType.CHARACTER_SET, "UTF-8");		
BitMatrix bitMatrix = new QRCodeWriter().encode(stringToEncode, BarcodeFormat.QR_CODE, imageWith, imageHeight,hintMap);
MatrixToImageWriter.writeToPath(bitMatrix, imageFormat, outputFile.toPath());


// Parameters
File outputFile=new File("/tmp","myqrcode.png");
// Decode
BufferedImage image =;
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
EnumMap<DecodeHintType, ?> hints = new EnumMap<>(DecodeHintType.class);
QRCodeReader reader = new QRCodeReader();
Result result = reader.decode(bitmap, hints);
return result.getText();

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