Encode base 64

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import org.apache.commons.codec.binary.Base64;

public class TestUtils {

	public static String encoderBase64(String filePath) {
        String base64File = "";
        File file = new File(filePath);
        try (FileInputStream imageInFile = new FileInputStream(file)) {
            byte fileData[] = new byte[(int) file.length()];
            imageInFile.read(fileData);
            base64File = Base64.encodeBase64String(fileData);
        } catch (FileNotFoundException e) {
            System.out.println("File not found" + e);
        } catch (IOException ioe) {
            System.out.println("Exception while reading the file " + ioe);
        }
        return base64File;
    }

}

Jar : commons-codec-1.6.jar