Java copy directory and its subdirectories, files, to another directory

	/**
	 * Copy a directory and its subdirectories, files to another directory
	 * @param src
	 * @param dest
	 * @throws ioexception/
	private void CopyFolder (file src, file dest) throws IOException {
		if (src.isdirectory ()) {
			if (!dest.exists ()) {
				Dest.mkdir ();
			}
			String files[] = Src.list ();
			for (String file:files) {
				file Srcfile = new file (src, file);
				File DestFile = new file (dest, file);
				Recursive replication
				copyfolder (srcfile, destfile);
			}
		} else {inputstream in
			= new FileInputStream (SRC);
			OutputStream out = new FileOutputStream (dest);

			byte[] buffer = new byte[1024];

			int length;
			
			while (length = in.read (buffer) > 0) {
				out.write (buffer, 0, length);
			}
			In.close ();
			Out.close ();
		}
	

Ps:apache Commons-io Package, Fileutils has related methods, Ioutils is generally copy files.

Deletes the directory structure fileutils.deletedirectory (dest);

Recursively copy directory and file Fileutils.copydirectory (SRC, dest);