AES encrypt with openssl decrypt using java

Java's SecretKeySpec uses the password ASCII bytes directly as key bytes, while OpenSSL's -pass pass:... method derives a key from the password using a key derivation function to transform the password into a key in a secure fashion. You can either try to do the same key derivation in Java (which you probably cannot if I interpret your question correctly), or use OpenSSL's -K option to pass in a key (as hex bytes!) instead of a password.

You can find out how there.

To add a bit. I was struggling with the same problem. I was able to decrypt from Java an AES-128 encrypted message using the following settings.

I used openssl to encrypt the data:

openssl enc -nosalt -aes-128-ecb -in data.txt -out crypted-aes.data -K 50645367566B59703373367639792442

As @Daniel suggested, the game changer is to use the -K property. The Java configuration that let us to decrypt the generated file is the following:

final byte[] aesKey = "PdSgVkYp3s6v9y$B".getBytes(StandardCharsets.UTF_8);
final SecretKeySpec aesKeySpec = new SecretKeySpec(aesKey, "AES");
Path path = Paths.get("src/test/resources/crypted-aes.data");
final byte[] cryptedData = Files.readAllBytes(path);
final Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, aesKeySpec);
final byte[] decryptedMsg = cipher.doFinal(cryptedData);

The magic happens when the hex key 50645367566B59703373367639792442, its String representation "PdSgVkYp3s6v9y$B", and the AES/ECB/PKCS5Padding align together.