下記をpom.xmlに追記してmvn jetty:run <plugin> <groupId>org.mortbay.jetty</groupId> <artifactId>maven-jetty-plugin</artifactId> <configuration> <scanIntervalSeconds>10</scanIntervalSeconds> <contextPath>/</contextPath> <webXml>war/WEB-INF/web.xml</webXml> <webAppSourceDirectory>war</webAppSourceDirectory> </configuration></plugin>