When optimizing imports on a jsp page with the following header:
<%@ page language="java" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" import="org.apache.struts.util.MessageResources, org.apache.struts.Globals, java.util.Locale"%>
IDEA generates the following when none of the imports are required:
<%@ page language="java" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" import="null"%>
<%@ page language="java" import="java.util.List"%>
results in
<%@ page language="java" import="null"%>