Because no initializer class is specified, the SampleForm portlet uses the default initializer, JspPortletInitializer. This initializer requires a page name as a parameter. The SampleForm portlet has its own JSP page named SampleForm.jsp.

      <init-param>
         <param-name>display-page</param-name>
         <param-value>SampleForm.jsp</param-value>
      </init-param>