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1public class AES2 {
2    private static final String algo = "AES/CBC/PKCS5Padding";
3    private static final byte[] keyValue = 
4        new byte[] { 'T', 'h', 'e', 'B', 'e', 's', 't','S', 'e', 'c', 'r','e', 't', 'K', 'e', 'y' };
5
6    public static String encrypt(String Data) throws Exception {
7
8        //KeyGenerator KeyGen = KeyGenerator.getInstance("AES");
9        //KeyGen.init(128);
10
11        //SecretKey SecKey = KeyGen.generateKey();
12        Key key=generateKey();
13
14        //generar IV
15        byte[] iv = new byte[16];
16        SecureRandom random = new SecureRandom();
17        random.nextBytes(iv);
18        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);
19
20        //cifrar
21        Cipher c = Cipher.getInstance(algo);
22        c.init(Cipher.ENCRYPT_MODE, key, ivParameterSpec);
23
24        byte[] encVal = c.doFinal(Data.getBytes());
25        String encryptedValue = new BASE64Encoder().encode(encVal);
26        return encryptedValue;
27    }
28
29    public static String decrypt(String encryptedData) throws Exception {
30        Key key = generateKey();
31
32        byte[] iv = new byte[16];
33        SecureRandom random = new SecureRandom();
34        random.nextBytes(iv);
35        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);
36
37        Cipher c = Cipher.getInstance(algo);
38        c.init(Cipher.DECRYPT_MODE, key,ivParameterSpec);
39
40        byte[] decordedValue = new BASE64Decoder().decodeBuffer(encryptedData);
41        byte[] decValue = c.doFinal(decordedValue);
42        String decryptedValue = new String(decValue);
43        return decryptedValue;
44    }
45
46    private static Key generateKey() throws Exception {
47        Key key = new SecretKeySpec(keyValue, "AES");
48        return key;
49}
50}
51
52Main class:
53
54public class aesMain {
55
56    /**
57     * @param args the command line arguments
58     */
59    public static void main(String[] args) throws Exception {
60
61        String texto = "hola mama";
62        String encryptedText=AES2.encrypt(texto);
63        String decryptedText=AES2.decrypt(encryptedText);
64
65
66        System.out.println("Plain text : " + texto);
67        System.out.println("Encrypted Text : " + encryptedText);
68        System.out.println("Decrypted Text : " + decryptedText);
69    }
70
71}