Comment définir le niveau des source JSP

Dans le fichier conf/web.xml on règle le source level

<pre class="text">   <servlet>
      <servlet-name>jsp</servlet-name>
      <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
      <init-param>
          <param-name>fork</param-name>
          <param-value>false</param-value>
      </init-param>
       <init-param>
               <param-name>compilerSourceVM</param-name>
                  <param-value>1.5</param-value>
                 </init-param>
  <init-param>
      <param-name>compilerTargetVM</param-name>
      <param-value>1.5</param-value>
   </init-param>
   <init-param>
          <param-name>xpoweredBy</param-name>
          <param-value>false</param-value>
      </init-param>
      <load-on-startup>3</load-on-startup>
  </servlet>

http://tomcat.apache.org/tomcat-5.5-doc/jasper-howto.html