.NETCore WebApi框架：从appsettings.json 读取参数配置|C/S开发框架

    /// <summary>
    /// 用于加载appsettings.json配置文件的jwt配置信息
    /// </summary>
    public class JwtOptions
    {
        [Display(Name = "Secret Key jwt令牌加密秘钥")]
        public string Secret { get; set; }

        [Display(Name = "Access Expire Hours 访问令牌的有效截止时间")] 
        public int AccessExpireHours { get; set; }

        [Display(Name = "Refresh Expire Hours 刷新令牌的有效截止时间")]
        public int RefreshExpireHours { get; set; }

        [Display(Name = "Issuer 发送方")]
        public string Issuer { get; set; }

        [Display(Name = "Audience 接收方")]
        public string Audience { get; set; }
    }

  public static IHostBuilder UseCache(this IHostBuilder hostBuilder)
  {
      hostBuilder.ConfigureServices((context, services) =>
      {
          services.Configure<CacheOptions>(context.Configuration.GetSection("Cache"));
          var option = context.Configuration.GetSection("Cache").Get<CacheOptions>();
       }
   }

        public static IServiceCollection AddJwtBearer(this IServiceCollection services, IConfiguration configuration, string sectionName)
        {
            //获取jwt参数配置
            services.Configure<JwtOptions>(configuration.GetSection(sectionName));
            var myOptions = configuration.GetSection(sectionName).Get<JwtOptions>();
        }

        /// <summary>
        /// 获取appsettings.json的配置信息
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sectionName"></param>
        /// <returns></returns>
        public static T GetSettings<T>(string sectionName)
        {
            //实例化IConfiguration接口
            var builder = new ConfigurationBuilder().AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);
            var configRoot = builder.Build();
            var section = configRoot.GetSection(sectionName);
            return section.Get<T>();
        }