Can Calibre canvert a folder into epub?

This folder is organize as
Title(folder)
..h1.1(folder)
....h2.1(folder)
......h3.1.html(file)
...
....h2.2.html(file)
..h1.2.html(file)
..h1.3(folder)
....h2.3.html(file)
....h2.4.html(file)

I want get file in epub with Title and TOC of H1,H2,H3,H4...

Or which software can I do this?