/// <summary>
        /// 显示Url模式
        /// </summary>
        /// <param name="options">Swagger生成选项</param>
        /// <param name="mode">显示Url模式</param>
        public static void ShowUrlMode(this SwaggerGenOptions options, UrlShowMode mode = UrlShowMode.FirstLowercase)
        {
            switch (mode)
            {
            case UrlShowMode.FirstLowercase:
                options.AddDocumentFilter <FirstLowercaseUrlDocumentFilter>();
                break;

            case UrlShowMode.AllLowercase:
                options.AddDocumentFilter <AllLowercaseUrlDocumentFilter>();
                break;

            case UrlShowMode.FirstUppercase:
                options.AddDocumentFilter <FirstUppercaseUrlDocumentFilter>();
                break;

            case UrlShowMode.AllUppercase:
                options.AddDocumentFilter <AllUppercaseUrlDocumentFilter>();
                break;
            }
        }