All the elements of the portlet need to be deployed in a Web archive (.war) file. This file can be created with any zip creation tool, the jar command line utility or the export utility of Rational Application Developer. Each war file should contain elements listed in Figure 1-15.
The source folder is optional and you may choose what source to include for distribution.
The webApplication folder is optional and may be used to contain the WEB-INF folder. Alternatively, the WEB-INF folder can be placed directly under the root without modification.
Generally, it will also contain a JSP folder ...