Java 小白提问，这段代码是标准 RSA 加密吗

对加密方面不太熟，请大佬帮忙看看

public static String encryptByPublicKey(String source, byte[] key) throws Exception {
    byte[] data = source.getBytes("utf-8");
    byte[] keyBytes = key;
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
    Key publicKey = keyFactory.generatePublic(x509KeySpec);
    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
    cipher.init(1, publicKey);
    int inputLen = data.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    int i = 0;
    while (inputLen - offSet > 0) {
      byte[] cache;
      if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
        cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
      } else {
        cache = cipher.doFinal(data, offSet, inputLen - offSet);
      } 
      out.write(cache, 0, cache.length);
      i++;
      offSet = i * MAX_ENCRYPT_BLOCK;
    } 
    byte[] encryptedData = out.toByteArray();
    out.close();
    return (new String(Base64.encodeBase64(encryptedData), "UTF8")).replaceAll("\r\n", "");
  }