如何使用Java生成具有安全哈希的QR码

<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.4.0</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.4.0</version>
</dependency>

public byte[] qrCodeGenerator(String id) throws IOException, 
WriterException, 
InvalidKeySpecException, 
NoSuchAlgorithmException {
String filePath = "QRCode.png";
String charset = "UTF-8";
Map hintMap = new HashMap();
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
Map<String, String> qrCodeDataMap = Map.of(
"Name", id,
"Key", keyProvider.generateVerificationKey(id) 
// see next section for ´generateVerificationKey´ method
);
String jsonString = new JSONObject(qrCodeDataMap).toString();
createQRCode(jsonString, filePath, charset, hintMap, 500, 500);
BufferedImage image = ImageIO.read(new File(filePath));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(image, "png", baos);
byte[] imageData = baos.toByteArray();
return imageData;
}
private void createQRCode(String qrCodeData, 
String filePath, 
String charset, 
Map hintMap, 
int qrCodeHeight, 
int qrCodeWidth) throws WriterException, 
IOException {
BitMatrix matrix = new MultiFormatWriter().encode(
new String(qrCodeData.getBytes(charset), charset),
BarcodeFormat.QR_CODE,
qrCodeWidth,
qrCodeHeight,
hintMap
);
MatrixToImageWriter.writeToPath(
matrix,
filePath.substring(filePath.lastIndexOf('.') + 1),
FileSystems.getDefault().getPath(filePath)
);
}

Map<String, String> qrCodeDataMap = Map.of(
"Name", "SampleText",
"Key", "SomeHashedValue"
);

<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20180813</version>
</dependency>

<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.12</version>
</dependency>

public String generateVerificationKey(String str) throws NoSuchAlgorithmException,
InvalidKeySpecException {
int iterations = 10000;
int keyLength = 512;
char[] strChars = str.toCharArray();
byte[] saltBytes = salt.getBytes();
SecretKeyFactory skf = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA512");
PBEKeySpec spec = new PBEKeySpec(strChars, saltBytes, iterations, keyLength);
SecretKey key = skf.generateSecret( spec );
byte[] hashedBytes = key.getEncoded( );
return Hex.encodeHexString(hashedBytes);
}