tomcat/webapps/ROOT/WEB-INF/web.xml に <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>*.action</url-pattern> </filter-mapping> を記述すればStruts2は動いた。必要に迫られたの…