encode and decode a html page using java script (used base64)

package encrypt;

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 *
 * @author GAYAN
 */
public class Encrypt {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        File n = new File("C:\\Users\\Shashika\\Desktop\\enc");
        File[] listFiles = n.listFiles();
        for (File file : listFiles) {
            InputStream is = null;
            OutputStream os = null;
            try {
                BASE64Encoder bs = new BASE64Encoder();
                System.out.println(file.getName());
                is = new FileInputStream(file);
//                os=new FileOutputStream(file);
                byte[] bs1 = null;
                try {
                    bs1 = new byte[is.available()];
                    System.out.println("read="+is.available());
                    is.read(bs1);
                    String encode = bs.encode(bs1);
                    System.out.println(encode);
                    
                    is.close();
                    os=new FileOutputStream(file);
                    
                    os.write(encode.getBytes());
                    os.close();
                    
                    
                    System.out.println("=====================decoding========================");
                    
                    BASE64Decoder decoder=new BASE64Decoder();
                    byte[] decodeBuffer = decoder.decodeBuffer(new FileInputStream(file));
                    
                    String s=new String(decodeBuffer);
                    System.out.println(s);
                    
     File f=new File("C:\\Users\\Shashika\\Desktop\\enc\\enc0000.html");
                    
                    OutputStream os1=new FileOutputStream(f);
                    
                    os1.write(decodeBuffer);
                    os1.flush();
                    os1.close();
                    //                    for (byte b : bs1) {
                    //                        System.out.println("byte="+b);
                    //                    }
                } catch (Exception ex) {
                    Logger.getLogger(Encrypt.class.getName()).log(Level.SEVERE, null, ex);
                }

                break;
            } //        bs.encode();
            catch (FileNotFoundException ex) {
                Logger.getLogger(Encrypt.class.getName()).log(Level.SEVERE, null, ex);
            } finally {
                try {
                    is.close();
                } catch (IOException ex) {
                    Logger.getLogger(Encrypt.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }


//        bs.encode();

    }
}