过滤器和监听器

Question

求过滤器和监听器的例子？知道的请写上您的例子，谢谢了...

Answer 1

web.xml <filter>
<filter-name>jspFilter</filter-name>
<filter-class>com.huawei.hdm.servlet.CheckUser</filter-class>
</filter> <filter-mapping>
<filter-name>jspFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping> <listener>
<listener-class>com.huawei.hdm.servlet.SessionListenerLifecycle</listener-class>
</listener>

Answer 2

public class CheckUser implements Filter {
   public void doFilter(ServletRequest request, ServletResponse reponse, FilterChain   chain) throws IOException, ServletException {
   }
}public class SessionListenerLifecycle extends BaseAction implements HttpSessionListener,
      HttpSessionAttributeListener {
}