Fixed bug: error page cannot show correct corresponding status code

router.go

@@ -445,6 +445,7 @@ func (p *ControllerRegistor) ServeHTTP(rw http.ResponseWriter, r *http.Request)
 	//if no matches to url, throw a not found exception
 	if !findrouter {
 		if h, ok := ErrorMaps["404"]; ok {
+			w.status = 404
 			h(w, r)
 		} else {
 			http.NotFound(w, r)