在java中使用散列的openssl_encrypt aes 256

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.util.Base64;

String key = "这是一个密钥";  // 密钥必须是长度为16的字符串
byte[] keyBytes = key.getBytes(StandardCharsets.UTF_8);
MessageDigest sha = MessageDigest.getInstance("SHA-256");
keyBytes = sha.digest(keyBytes);
keyBytes = Arrays.copyOf(keyBytes, 16);  // 密钥长度限制为16字节
SecretKeySpec secretKeySpec = new SecretKeySpec(keyBytes, "AES");

public static String encrypt(String strToEncrypt, SecretKeySpec secretKeySpec) {
    try {
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
        byte[] encryptedBytes = cipher.doFinal(strToEncrypt.getBytes(StandardCharsets.UTF_8));
        return Base64.getEncoder().encodeToString(encryptedBytes);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

String strToEncrypt = "要加密的字符串";
String encryptedString = encrypt(strToEncrypt, secretKeySpec);
System.out.println("加密后的字符串：" + encryptedString);