要给出带有代码示例的AES加密协助的解决方法，需要使用一个支持AES加密的编程语言或库。以下是使用Java和Python的示例：

Java示例：

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

public class AESHelper {

    public static String encrypt(String plaintext, String key) throws Exception {
        SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] encryptedBytes = cipher.doFinal(plaintext.getBytes());
        return Base64.getEncoder().encodeToString(encryptedBytes);
    }

    public static String decrypt(String ciphertext, String key) throws Exception {
        SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte[] encryptedBytes = Base64.getDecoder().decode(ciphertext);
        byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
        return new String(decryptedBytes);
    }

    public static void main(String[] args) throws Exception {
        String plaintext = "Hello, AES!";
        String key = "abcdefghijklmnop";

        String encryptedText = encrypt(plaintext, key);
        System.out.println("Encrypted Text: " + encryptedText);

        String decryptedText = decrypt(encryptedText, key);
        System.out.println("Decrypted Text: " + decryptedText);
    }
}

Python示例：

from Crypto.Cipher import AES
import base64

def encrypt(plaintext, key):
    cipher = AES.new(key.encode(), AES.MODE_ECB)
    encryptedBytes = cipher.encrypt(plaintext.encode())
    return base64.b64encode(encryptedBytes).decode()

def decrypt(ciphertext, key):
    cipher = AES.new(key.encode(), AES.MODE_ECB)
    decryptedBytes = cipher.decrypt(base64.b64decode(ciphertext))
    return decryptedBytes.decode()

plaintext = "Hello, AES!"
key = "abcdefghijklmnop"

encryptedText = encrypt(plaintext, key)
print("Encrypted Text: " + encryptedText)

decryptedText = decrypt(encryptedText, key)
print("Decrypted Text: " + decryptedText)

这些示例使用了AES算法和ECB模式进行加密和解密，使用了预设的密钥长度和填充方式（PKCS5Padding）。请注意，ECB模式不是最安全的模式，因此在实际使用中可能需要考虑使用其他模式（如CBC）和一个更安全的密钥生成和管理方案。