How to connect Exchange Web Services via java web service client?

开发者_如何转开发I am using JWebService framework to connect my Exchange Server 2007. As it is a paid version, I am looking for some open source like JWebService.

Can anyone suggest a good alternative Java API that is free?

Thanks in advance!

---

You can have a look at http://archive.msdn.microsoft.com/ewsjavaapi and http://sourceforge.net/projects/j-xchange/