Autofac
Autofac.WebApi2.Owin

 //注册依赖注入
            ContainerBuilder builder = new ContainerBuilder();
            // Register your Web API controllers.
            builder.RegisterApiControllers(Assembly.GetExecutingAssembly());
            
            builder.RegisterType<JwtUserRepository>().As<IJwtUserRepository>();
            builder.RegisterType<JwtUserService>().As<IJwtUserService>();

            // Run other optional steps,like registering filters,// per-controller-type services,etc.,then set the dependency resolver
            // to be Autofac.
            IContainer container = builder.Build();
            config.DependencyResolver = new AutofacWebApiDependencyResolver(container);

            // OWIN WEB API SETUP:

            // Register the Autofac middleware FIRST,then the Autofac Web API middleware,// and finally the standard Web API middleware.
            app.UseAutofacMiddleware(container);
            app.UseAutofacWebApi(config);