write java program to cipher to encryption decryption username and password

1package com.javapapers.java.security;
2
3import java.io.FileInputStream;
4import java.io.FileOutputStream;
5import java.util.Random;
6
7import javax.crypto.Cipher;
8import javax.crypto.SecretKey;
9import javax.crypto.SecretKeyFactory;
10import javax.crypto.spec.PBEKeySpec;
11import javax.crypto.spec.PBEParameterSpec;
12
13public class FileEncryption {
14
15	public static void main(String[] args) throws Exception {
16
17		FileInputStream inFile = new FileInputStream("plainfile.txt");
18		FileOutputStream outFile = new FileOutputStream("plainfile.des");
19
20		String password = "javapapers";
21		PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray());
22		SecretKeyFactory secretKeyFactory = SecretKeyFactory
23				.getInstance("PBEWithMD5AndTripleDES");
24		SecretKey secretKey = secretKeyFactory.generateSecret(pbeKeySpec);
25
26		byte[] salt = new byte[8];
27		Random random = new Random();
28		random.nextBytes(salt);
29
30		PBEParameterSpec pbeParameterSpec = new PBEParameterSpec(salt, 100);
31		Cipher cipher = Cipher.getInstance("PBEWithMD5AndTripleDES");
32		cipher.init(Cipher.ENCRYPT_MODE, secretKey, pbeParameterSpec);
33		outFile.write(salt);
34
35		byte[] input = new byte[64];
36		int bytesRead;
37		while ((bytesRead = inFile.read(input)) != -1) {
38			byte[] output = cipher.update(input, 0, bytesRead);
39			if (output != null)
40				outFile.write(output);
41		}
42
43		byte[] output = cipher.doFinal();
44		if (output != null)
45			outFile.write(output);
46
47		inFile.close();
48		outFile.flush();
49		outFile.close();
50	}
51
52}