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ASP.net Core自带DI(依赖注入),用法如下: services.AddScoped(typeof(IProductService), typeof(ProductService)); 如果服务较多,必定造成文件难以维护 所以需要利用反射批量实现注册 核心代码如下: 一个类可能间接继承了多个接口(例如:public 和internal的接口),这里我们就以实现类为Key,所继承的接口为value构造一个集合      /// <summary> /// 获取程序集中的实现类对应的多个接口 /// </summary> /// <param name="assemblyName">程序集</param> public Dictionary<Type, Type[]> GetClassName(string assemblyName) { if (!String.IsNullOrEmpty(assemblyName)) { Assembly assembly = Assembly.Load(assemblyName); List<Type> ts = assembly.GetTypes().ToList(); var result = new Dictionary<Type, Type[]>(); foreach (var item in ts.Where(s => !s.IsInterface)) { var interfaceType = item.GetInterfaces(); result.Add(item, interfaceType); } return result; } return new Dictionary<Type, Type[]>(); } 注册: 我们现在可以把具体的注册例如 services.AddScoped(typeof(IProductService), typeof(ProductService)); 改为:         //集中注册服务 foreach (var item in GetClassName("Service")) { foreach (var typeArray in item.Value) { services.AddScoped(typeArray, item.Key); } }  完整代码: using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using Microsoft.AspNetCore.Builder; using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Logging; using Microsoft.Extensions.Options; using Microsoft.EntityFrameworkCore; using Entity.Table; using DAL; using System.Reflection; using Service; namespace ASP.NetCoreAPI { public class Startup { public Startup(IConfiguration configuration) { Configuration = configuration; } public IConfiguration Configuration { get; } // This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services) { services.AddDbContext<ProductContext>(options => options.UseMySql(Configuration.GetConnectionString("MySqlConnection")));//添加Mysql支持 //集中注册服务 foreach (var item in GetClassName("Service")) { foreach (var typeArray in item.Value) { services.AddScoped(typeArray, item.Key); } } services.AddUnitOfWork<ProductContext>();//添加UnitOfWork支持 //services.AddScoped(typeof(IProductService), typeof(ProductService));//用ASP.NET Core自带依赖注入(DI)注入使用的类 services.AddMvc(); } // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IHostingEnvironment env) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } app.UseMvc(); } /// <summary> /// 获取程序集中的实现类对应的多个接口 /// </summary> /// <param name="assemblyName">程序集</param> public Dictionary<Type, Type[]> GetClassName(string assemblyName) { if (!String.IsNullOrEmpty(assemblyName)) { Assembly assembly = Assembly.Load(assemblyName); List<Type> ts = assembly.GetTypes().ToList(); var result = new Dictionary<Type, Type[]>(); foreach (var item in ts.Where(s => !s.IsInterface)) { var interfaceType = item.GetInterfaces(); result.Add(item, interfaceType); } return result; } return new Dictionary<Type, Type[]>(); } } } .