wicket-quickstart/src/webapp/WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
      PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
      "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>
    <display-name>Wicket QuickStart</display-name>

    <servlet>
        <servlet-name>quickstart</servlet-name>
        <servlet-class>wicket.protocol.http.WicketServlet</servlet-class>
        <init-param>
          <param-name>applicationClassName</param-name>
          <param-value>wicket.quickstart.QuickStartApplication</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>quickstart</servlet-name>
        <url-pattern>/app/*</url-pattern>
    </servlet-mapping>

</web-app>