关于以下的web.xml设定：
    <filter-mapping>
  <filter-name>SecurityFilter</filter-name>
  <url-pattern>/add.do</url-pattern>
    </filter-mapping>
    <filter-mapping>
  <filter-name>SecurityFilter</filter-name>
  <url-pattern>*.view</url-pattern>
    </filter-mapping>
    <filter-mapping>
  <filter-name>CharacterFilter</filter-name>
  <url-pattern>/add.do</url-pattern>
    </filter-mapping>
以下描述何者正确？