public interface IFoo
{
  string GetInputString(string input);
}

public class Foo : IFoo
{
  public string GetInputString(string input)
  {
    return $"输入的字符串为：{ input }";
  }
}

public void ConfigureServices(IServiceCollection services)
{
  services.Add(new ServiceDescriptor(serviceType: typeof(IFoo), 
                    implementationType: typeof(Foo), 
                    lifetime: ServiceLifetime.Transient));
}

 "Logging": {
  "IncludeScopes": false,
  "LogLevel": {
   "Default": "Debug",
   "System": "Information",
   "Microsoft": "Information"
  }
 },

 "DIServices": [
  {
   "serviceType": "[namesapce].IFoo",
   "implementationType": "[namesapce].Foo",
   "lifetime": "Transient"
  }
 ]
}

using Microsoft.Extensions.DependencyInjection;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;

public class Service
{
  public string ServiceType { get; set; }

  public string ImplementationType { get;set; }

  [JsonConverter(typeof(StringEnumConverter))]
  public ServiceLifetime Lifetime { get; set; }
}

public void ConfigureServices(IServiceCollection services)
{
  //services.Add(new ServiceDescriptor(serviceType: typeof(IFoo),
  //            implementationType: typeof(Foo),
  //            lifetime: ServiceLifetime.Transient));

  var jsonServices = JObject.Parse(File.ReadAllText("appSettings.json"))["DIServices"];
  var requiredServices = JsonConvert.DeserializeObject<List<Service>>(jsonServices.ToString());

  foreach (var service in requiredServices) {
    services.Add(new ServiceDescriptor(serviceType: Type.GetType(service.ServiceType),
                      implementationType: Type.GetType(service.ImplementationType),
                      lifetime: service.Lifetime));
  }
}

public class HomeController : Controller
{
  private readonly IFoo _foo;

  public HomeController(IFoo foo) 
  {
    _foo = foo;
  }

  public IActionResult About() 
  {
    ViewData["Message"] = _foo.GetInputString("Your application description page.");

    return View();
  }
}