web portal development in java platform

what is the tool to develop a web portal in java plat开发者_如何学Pythonform and what is the lanugage used in it core java or jsp.

You can consider using: Play! framework. It's quite similar to Rails and Django.

You can use JBOSS portals which jars are available for Eclipse IDE. You can refer JBoss Portal Server Development book by Ramanujam Rao.It is very good reference book, also you can go to this link http://www.jboss.org/jbossportal

And Both Java and JSP technologies are used for portal development.