JAVA AES Plus decryption detailed

The last essay left a question, the two kinds of encryption results are different?

In fact, the internal implementation is not the same way, see the notes

1  /**2 * provide keys and vectors for encryption3      *4      * @paramSSRC5      * @paramKey6      * @paramIV7      * @return8      * @throwsException9      */Ten      Public StaticString Encrypt (String sSrc,byte[] Key,byte[] IV)throwsException { OneSecretkeyspec Skeyspec =NewSecretkeyspec (Key, "AES");//constructs a key based on a given byte array ACipher Cipher = cipher.getinstance ("aes/cbc/pkcs5padding");//"algorithm/Mode/complement Method" -Ivparameterspec _iv =NewIvparameterspec (iv);//using CBC mode, a vector IV is required to increase the strength of the encryption algorithm -Cipher.init (Cipher.encrypt_mode, Skeyspec, _iv);//initializes this Cipher with a key and a set of algorithm parameters the         byte[] encrypted = Cipher.dofinal (Ssrc.getbytes ("Utf-8"));//encrypt or decrypt data by one-part operation, or end a multipart operation.  -         returnbase64.encodebase64string (encrypted); -}

1  /**2 * Encryption3      * @paramcontent4      * @paramkeybytes5      * @paramIV6      * @return7      * @throwsException8      */9      PublicString Aes_cbc_encrypt (byte[] content,byte[] keybytes,byte[] IV)throwsexception{Ten         Try{ OneKeygenerator keygenerator= keygenerator.getinstance ("AES");//returns the Keygenerator object that generates the secret key for the specified algorithm AKeygenerator.init (128,NewSecureRandom (keybytes));//initializes this key generator with a user-supplied random source that has a determined key size -Secretkey Key=keygenerator.generatekey ();//generates a key.  -Cipher cipher=cipher.getinstance ("aes/cbc/pkcs5padding"); theCipher.init (Cipher.encrypt_mode, Key,NewIvparameterspec (iv)); -             byte[] result=cipher.dofinal (content); -             returnbase64.encodebase64string (result); -}Catch(Exception e) { + e.printstacktrace (); -             Throwe; +         } A}

JAVA AES Plus decryption detailed