AES Encryption - Decryption

//AES Encryption - Decryption

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.security.NoSuchAlgorithmException;
import org.bouncycastle.crypto.digests.SHA1Digest;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.NoSuchPaddingException;
import org.bouncycastle.crypto.generators.PKCS5S1ParametersGenerator;
import javax.crypto.Cipher;
import org.bouncycastle.crypto.params.KeyParameter;


public class AESEncryptionDecrytionString {
    /**
     * @param args
     */
    static byte[] iv ="OFRna73m*aze01xY".getBytes();
    static byte[] salt="saltkey".getBytes();
    static String password="passwordkey";
    static int iterations=2,keySize=128;
    static String cipher_instance="AES/CBC/PKCS5Padding",algo="AES";   
   
    public static String encrypt(String strDataToEncrypt) throws NoSuchAlgorithmException, NoSuchPaddingException
    {       
        String strCipherText = new String();           
        try 
        {   

            PKCS5S1ParametersGenerator generator = new
            PasswordDeriveBytes(new SHA1Digest());
            generator.init(password.getBytes(), salt, iterations);
            byte[] key = ((KeyParameter)
                    generator.generateDerivedParameters(keySize)).getKey();
            SecretKey secretKey = new SecretKeySpec(key, algo);
            Cipher aesCipher = Cipher.getInstance(cipher_instance);   
            aesCipher.init(Cipher.ENCRYPT_MODE,secretKey,new IvParameterSpec(iv));
            byte[] byteDataToEncrypt = strDataToEncrypt.getBytes("UTF8");
            byte[] byteCipherText = aesCipher.doFinal(byteDataToEncrypt); 
            strCipherText =new String(byteCipherText);//.apache.commons.codec.binary.Base64.encodeBase64String(byteCipherText);// BASE64Encoder().encode(byteCipherText);
            byte[] b=org.apache.commons.codec.binary.Base64.encodeBase64(byteCipherText);
            strCipherText=new String(b);
        } 
        catch (Exception e) 
        {
            System.out.println(e.getMessage());
        }
        return strCipherText;       
    }

    public static String decrypt(String strCipherText) throws NoSuchAlgorithmException, NoSuchPaddingException
    {
        String strDecryptedText = new String();
        try
        {
            SecretKeySpec secretKey = new SecretKeySpec(password.getBytes(), "AES");
            PKCS5S1ParametersGenerator generator = new
            PasswordDeriveBytes(new SHA1Digest());
            generator.init(password.getBytes(), salt, iterations);
            byte[] key = ((KeyParameter)
                    generator.generateDerivedParameters(keySize)).getKey();
            secretKey = new SecretKeySpec(key, algo);
            Cipher aesCipher = Cipher.getInstance(cipher_instance);       
            aesCipher.init(Cipher.DECRYPT_MODE,secretKey,new IvParameterSpec(iv));
            byte[] byteCipherText=org.apache.commons.codec.binary.Base64.decodeBase64(strCipherText.getBytes());

            byte[] byteDecryptedText = aesCipher.doFinal(byteCipherText);
            strDecryptedText = new String(byteDecryptedText);
        }
        catch (Exception e) 
        {
            System.out.println(e.getMessage());
        }       

        return strDecryptedText;       
    }

    public static String encryptString(String strDataToEncrypt,String newkey) throws NoSuchAlgorithmException, NoSuchPaddingException
    {       
        String strCipherText = new String();           
        try 
        {   
           
            PKCS5S1ParametersGenerator generator = new
            PasswordDeriveBytes(new SHA1Digest());
            generator.init(newpassword.getBytes(), salt, iterations);
            byte[] key = ((KeyParameter)
                    generator.generateDerivedParameters(keySize)).getKey();
            SecretKey secretKey = new SecretKeySpec(key, algo);
            Cipher aesCipher = Cipher.getInstance(cipher_instance);   
            aesCipher.init(Cipher.ENCRYPT_MODE,secretKey,new IvParameterSpec(iv));
            byte[] byteDataToEncrypt = strDataToEncrypt.getBytes("UTF8");
            byte[] byteCipherText = aesCipher.doFinal(byteDataToEncrypt); 
            strCipherText =new String(byteCipherText);//.apache.commons.codec.binary.Base64.encodeBase64String(byteCipherText);// BASE64Encoder().encode(byteCipherText);
            byte[] b=org.apache.commons.codec.binary.Base64.encodeBase64(byteCipherText);
            strCipherText=new String(b);
        } 
        catch (Exception e) 
        {
            System.out.println(e.getMessage());
        }
        return strCipherText;       
    }

    public static String decryptString(String strCipherText,String newkey) throws NoSuchAlgorithmException, NoSuchPaddingException
    {
       
        String strDecryptedText = new String();
        try
        {
            SecretKeySpec secretKey = new SecretKeySpec(password.getBytes(), "AES");
            PKCS5S1ParametersGenerator generator = new
            PasswordDeriveBytes(new SHA1Digest());
            generator.init(newkey.getBytes(), salt, iterations);
            byte[] key = ((KeyParameter)
                    generator.generateDerivedParameters(keySize)).getKey();
            secretKey = new SecretKeySpec(key, algo);
            Cipher aesCipher = Cipher.getInstance(cipher_instance);       
            aesCipher.init(Cipher.DECRYPT_MODE,secretKey,new IvParameterSpec(iv));
            byte[] byteCipherText=org.apache.commons.codec.binary.Base64.decodeBase64(strCipherText.getBytes());

            byte[] byteDecryptedText = aesCipher.doFinal(byteCipherText);
            strDecryptedText = new String(byteDecryptedText);
        }
        catch (Exception e) 
        {
            System.out.println(e.getMessage());
        }       

        return strDecryptedText;       
    }
}