md.digest 计算的消息摘要与JDK计算的值不一致

let md: cryptoFramework.Md; 
try { 
  md = cryptoFramework.createMd('SHA256'); 
} catch (e) { 
  logger.error(TAG, 'createMd with SHA256 fail:' + JSON.parse(e)); 
  expect(e).assertFail(); 
  return; 
} 
 
let inputStream: fs.Stream | undefined = undefined; 
try { 
// let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY); 
inputStream = await fs.createStream(filePath, 'r+'); 
let readLen = 256; 
let readSize = 0; 
while (readLen > 0) { 
let buf = new ArrayBuffer(readLen); 
readLen = await inputStream.read(buf, { 
offset: readSize 
}); 
readSize += readLen; 
// arkTS 计算的数据类型为 Uint8Array 
let inputDataBlob: cryptoFramework.DataBlob = { 
data: new Uint8Array(buf) 
} 
await md.update(inputDataBlob); 
} 
// 计算结果 
let mdDigest = await md.digest(); 
public static byte[] computeHashOfFile(String fileLocation, String hashType) { 
MessageDigest md; 
byte[] hash = null; 
try { 
md = MessageDigest.getInstance(hashType); 
} catch (NoSuchAlgorithmException e) { 
  return null; 
} 
 
try (InputStream fis = new FileInputStream(fileLocation)) { 
int n = 0; 
int readSize = 0; 
while (n != -1) { 
byte[] buffer = new byte[256]; 
n = fis.read(buffer); 
if (n > 0) { 
md.update(buffer, 0, n); 
readSize += n; 
} 
} 
hash = md.digest(); 
} catch (IOException e) { 
 
} 
return hash; 
}