FileHelper

FileHelper.java

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.Comparator;

public class FileHelper {

    public static void copyFolder(File sourceFolder, File destinationFolder) throws IOException {
        if (sourceFolder.isDirectory()) {
            if (!destinationFolder.exists()) {
                destinationFolder.mkdir();
            }

            String files[] = sourceFolder.list();

            for (String file : files) {
                File srcFile = new File(sourceFolder, file);
                File destFile = new File(destinationFolder, file);

                copyFolder(srcFile, destFile);
            }
        } else {
            Files.copy(sourceFolder.toPath(), destinationFolder.toPath(), StandardCopyOption.REPLACE_EXISTING);
        }
    }

    public static void deleteDirectory(String directoryPath) throws IOException {
        Path pathToBeDeleted = Paths.get(directoryPath);
        Files.walk(pathToBeDeleted)
                .sorted(Comparator.reverseOrder())
                .map(Path::toFile)
                .forEach(File::delete);
    }
}