Liferay - theme across all portlets?

If I create multiple portlets with liferay, how can I have 1 theme control开发者_StackOverflow中文版 the look of all of them?

Thanks

The Liferay's templating system consists of Velocity/Freemarker templates that renders particular html segments of portlets on a page. It is essentially one theme that styles everything.

If you choose to use JSPs on server side and Alloy UI framework on client side, even your portlet would have the same look and feel as the rest of the portal because Liferay JSP taglibs and Alloy UI both use the same CSS classes that the classic/default Liferay theme is expecting and made for.