dwr도 이렇게 설정할 수 있습니다

<servlet>
		<servlet-name>dwr-invoker</servlet-name>
		<servlet-class>
			org.directwebremoting.servlet.DwrServlet
		</servlet-class>
		<init-param>
			<param-name>config-dwr</param-name>
			<param-value>/WEB-INF/classes/**/*.dwr.xml</param-value>
		</init-param>

		<!-- dwr session  -->
		<init-param>
			<param-name>
				org.directwebremoting.extend.Remoter
			</param-name>
			<param-value>
				com.test.commonweb.dwr.DWRSessionService
			</param-value>
		</init-param>

		<init-param>
			<param-name>debug</param-name>
			<param-value>true</param-value>
		</init-param>
		<init-param>
			<param-name>pollAndCometEnabled</param-name>
			<param-value>true</param-value>
		</init-param>
		<init-param>
			<param-name>crossDomainSessionSecurity</param-name>
			<param-value>false</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>dwr-invoker</servlet-name>
		<url-pattern>/dwr/*</url-pattern>
	</servlet-mapping>