javaweb中去除某个get方式的参数，并且返回路径

String requestURL = request.getRequestURL() + "";
            // String queryString = request.getQueryString();
            Enumeration<String> paraNames = request.getParameterNames();
            String queryparam = "";
            int tmp = 0;
            for (Enumeration e = paraNames; e.hasMoreElements();) {
                String thisName = e.nextElement().toString();
                if (StringUtils.isNotEmpty(thisName)
                        && !thisName.equals("code")) {
                    if (tmp == 0) {
                        queryparam = queryparam + thisName + "="
                                + request.getParameter(thisName);
                    } else {
                        queryparam = queryparam + "&" + thisName + "="
                                + request.getParameter(thisName);
                    }
                    tmp++;
                }
            }
requestURL = requestURI + "?" + queryparam;

 获取参数参数值的方法是 request.getQuersyString();

关于getRequestURI与getRequestURL