I know to create Restful web service but I don't know how to implement restful facade in java.
I would appreciate if you share some links or examples of implementation.
Your question isn't that specific, so hard to provide a targeted suggestion, but I've been using spring mvc to create restful webservices in java with a fair amount of success. Spring have an examples project, which it claims "demonstrates the capabilities of the Spring MVC web framework through small, simple examples":