struts2 控制台打印request 请求路径 filter 过滤器实现

@Overridepublic void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,ServletException{//request.setCharacterEncoding("UTF-8");HttpServletRequest req = getRequest();        java.util.Enumeration<String> e2=req.getParameterNames();        String param="";        while(e2.hasMoreElements()){                String key=e2.nextElement();                param+=key+"="+(key==null?"":req.getParameter(key))+"&";        }       System.out.println("[url:]"+req.getRequestURI()+(param==null||"".equals(param)?"":"?"+param.substring(0, param.length()-1)));super.doFilter(request, response, chain);}