import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
 
public class Base64Inverse {

	
	public static void main(String[] args) throws Exception {
		 
		
	
		    String image ="C:\\tt1.txt";
		    decoderImage(image,"E:\\Garden.jpg");
			System.out.println("Bien décodé");

		  }



	
	private static void decoderImage(String image, String string) throws IOException {
		String fichier = string;
		String img = readFile(image); 
		byte[] buffer = Base64.decode(img);
		writeFile(buffer,fichier);
		
	}

	private static String  readFile(String filename) {
//		lecture du fichier texte
		String chaine="";

		try{
			InputStream ips=new FileInputStream(filename); 
			InputStreamReader ipsr=new InputStreamReader(ips);
			BufferedReader br=new BufferedReader(ipsr);
			String ligne;
			while ((ligne=br.readLine())!=null){
				chaine+=ligne;
			}
			br.close(); 
		}		
		catch (Exception e){
			System.out.println(e.toString());
		}
return chaine;
		}

	private static void writeFile( byte[] tab,String fichier) throws IOException {
	  File file = new File(fichier);
	  BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));
	  bos.write(tab);
	  bos.close();
																				 }


									}