shiro不跳转successUrl的问题

String successUrl = null;

       boolean contextRelative = true;

       SavedRequest savedRequest = WebUtils.getAndClearSavedRequest(request);

       if (<b><span style="color:#e53333;">savedRequest != null && savedRequest.getMethod().equalsIgnoreCase(AccessControlFilter.GET_METHOD)</span></b>) {

           successUrl = savedRequest.getRequestUrl();

           contextRelative = false;

       }

       if (successUrl == null) {

           successUrl = fallbackUrl;

       }

       if (successUrl == null) {

           throw new IllegalStateException("Success URL not available via saved request or via the " +

                   "successUrlFallback method parameter. One of these must be non-null for " +

                   "issueSuccessRedirect() to work.");

       }

       WebUtils.issueRedirect(request, response, successUrl, null, contextRelative);