public static String decrypt(String text) throws Exception {  
  
        String keySpec = "aaaaaaaaaaaaaaaa";  
        String iv = "bbbbbbbbbbbbbbbb";  
        byte[] textBytes = Base64.decode(text.getBytes(), Base64.DEFAULT);  
  
        IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes());  
  
        Key key = new SecretKeySpec(keySpec.getBytes(), "AES");  
  
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");  
  
        cipher.init(Cipher.DECRYPT_MODE, key, ivSpec); // 与加密时不同MODE:Cipher.DECRYPT_MODE  
  
        String result = cipher.doFinal(textBytes);  
  
        return result;  
  
}