上一节我们创建了基于Razor Page的简单应用，如果我们希望创建单页面应用或者移动应用，就需要通过Web Api调用应用层。Abp提供了从应用层到Web Api的自动映射，我们只需要增加少量的代码就可以，不需要编写重复的Api接口代码。
首先我们增加Swagger支持，使我们的应用支持Web Api浏览和测试，在程序包管理器中增加Swashbuckle.AspNetCore引用。
然后PoemWebModule中增加动态Web Api代码和对Swagger的支持：
using Microsoft.AspNetCore.Builder;using Microsoft.Extensions.DependencyInjection;using Microsoft.Extensions.Hosting;using Microsoft.OpenApi.Models;using Volo.Abp;using Volo.Abp.AspNetCore.Mvc;using Volo.Abp.Autofac;using Volo.Abp.Modularity;using ZL.AbpNext.Poem.Application;using ZL.AbpNext.Poem.Core;using ZL.AbpNext.Poem.EF;namespace ZL.AbpNext.Poem.Web{[DependsOn(typeof(AbpAspNetCoreMvcModule),typeof(AbpAutofacModule),typeof(PoemCoreModule),typeof(PoemApplicationModule),typeof(PoemDataModule))]public class PoemWebModule : AbpModule{public override void OnApplicationInitialization(ApplicationInitializationContext context){var app = context.GetApplicationBuilder();var env = context.GetEnvironment();if (env.IsDevelopment()){app.UseDeveloperExceptionPage();}else{app.UseExceptionHandler("/Error");}app.UseStaticFiles();app.UseRouting();app.UseSwagger();app.UseSwaggerUI(options =>{options.SwaggerEndpoint("/swagger/v1/swagger.json", "BookStore API");});app.UseConfiguredEndpoints();}public override void ConfigureServices(ServiceConfigurationContext context){Configure<AbpAspNetCoreMvcOptions>(options =>{options.ConventionalControllers.Create(typeof(PoemApplicationModule).Assembly);});var configuration = context.Services.GetConfiguration();ConfigureSwaggerServices(context.Services);}private void ConfigureSwaggerServices(IServiceCollection services){services.AddSwaggerGen(options =>{options.SwaggerDoc("v1", new OpenApiInfo {Title = "PoemApp API", Version = "v1" });options.DocInclusionPredicate((docName, description) => true);options.CustomSchemaIds(type => type.FullName);});}}}
运行应用，进入Swagger界面：
我们可以看到api的列表，我们可以测试一下，以api/app/poem/categories为例：
可以看到，正确返回了结果。
