exclude certain paths in <url-pattern> for filters

在Web.xml中配置Filter的过滤路径时，可否exclude某些路径？
不可以。there isn't an exclude pattern in the servlet spec.
You would need to do it from within your Filter code.在doFilter中对路径进行判断处理。例如

 doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
    if(req instanceof HttpServletRequest) { 
             HttpServletRequest hreq = (HttpServletRequest)req; 
             if(hreq.getRequestURI().endsWith("aaa.do"){
                // do something
             }
     } 
      chain.doFilter(req, res); 
}