How to decrypt a file by having key AES?

Hi,I have 32 bytes array which is a AES key. How I can decipher a file with this key?
[99 byte] By [_western_a] at [2007-9-19]
# 1
AES key is a Rijndael Key, generate to C/C++ and use in Java for decipher
_western_a at 2007-7-8 > top of java,Security,Cryptography...