密码过短，使用AES/CFB/NoPadding、AES/OFB/NoPadding或AES/CBC/NoPadding加密时会出现问题。

需要确保密码长度足够长，建议使用至少16位字符的密码。同时，应该在加密和解密过程中使用填充方案，例如PKCS5Padding或PKCS7Padding。以下是使用Java中的AES/CBC/PKCS5Padding加密和解密示例代码：

import javax.crypto.Cipher; 
import javax.crypto.KeyGenerator; 
import javax.crypto.SecretKey; 
import javax.crypto.spec.IvParameterSpec; 
import javax.crypto.spec.SecretKeySpec; 

public class AESUtils { 
    private static final String KEY_ALGORITHM = "AES"; 
    private static final String DEFAULT_CIPHER_ALGORITHM = "AES/CBC/PKCS5Padding"; 
    private static final int DEFAULT_KEY_SIZE = 128; 
    
    public static byte[] encrypt(byte[] content, byte[] keyBytes, byte[] ivBytes) throws Exception { 
        KeyGenerator kgen = KeyGenerator.getInstance(KEY_ALGORITHM); 
        kgen.init(DEFAULT_KEY_SIZE); 
        SecretKey secretKey = new SecretKeySpec(keyBytes, KEY_ALGORITHM); 
        Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM); 
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, new IvParameterSpec(ivBytes)); 
        return cipher.doFinal(content); 
    } 
    
    public static byte[] decrypt(byte[] content, byte[] keyBytes, byte[] ivBytes) throws Exception { 
        KeyGenerator kgen = KeyGenerator.getInstance(KEY_ALGORITHM); 
        kgen.init(DEFAULT_KEY_SIZE); 
        SecretKey secretKey = new SecretKeySpec(keyBytes, KEY_ALGORITHM); 
        Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM); 
        cipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(ivBytes)); 
        return cipher.doFinal(content); 
    } 
}