BujyfzB1

1private static byte[] encryptingAFile(List<Employee> list) {
2    byte[] empList, textEncrypted = null;
3
4    try {
5        ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
6        ObjectOutputStream object = new ObjectOutputStream(byteArray);
7
8        KeyGenerator keygenerator = KeyGenerator.getInstance("AES");
9        SecretKey myDesKey = keygenerator.generateKey();
10
11        Cipher desCipher;
12        desCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
13        String s;
14
15        for (Employee employee: list) {
16            object.writeObject(employee);
17        }
18
19        empList = byteArray.toByteArray();
20        desCipher.init(Cipher.ENCRYPT_MODE, myDesKey, new IvParameterSpec(new byte[16]));
21        textEncrypted = desCipher.doFinal(empList);
22
23        Files.write(Paths.get("Encrypt.txt"), textEncrypted);
24
25        desCipher.init(Cipher.DECRYPT_MODE, myDesKey, new IvParameterSpec(new byte[16]));
26        byte[] textDecrypted = desCipher.doFinal(textEncrypted);
27
28        ByteArrayInputStream bis = new ByteArrayInputStream(textDecrypted);
29        ObjectInputStream ois = new ObjectInputStream(bis);
30        List<Employee > result = (List<Employee>) ois.readObject();
31
32        System.out.println(result.toString());
33
34    }
35    catch (InvalidKeyException in) {
36        System.out.println(in);
37    }
38    catch (Exception e) {
39        System.out.println(e);
40    }
41    return textEncrypted;
42}