Ext is a complete development environment that eases customizing Liferay portal to requirements. It integrates several Liferay tools that can optionally be used to develop portlets and the portal, for example, JSP portlets, Struts portlets and even ServiceBuilder.
Within the Ext environment, there is a directory called
ext-impl/. Within this directory, there are JARs and WAR files that encapsulate the entire core source. That is, you could deploy and run Liferay with Ext environment alone. There is another directory called
ext-service/. Within this directory, you could specify your external models and services.
Ext has Ext-
web/docroot/html/ folder where you could have all JSP files or ...