第一种方法：直接添加swagger，会在app_start中生成SwaggerConfig，在该文件中配置相关内容（把生成xml打开）；
第二种方法：添加四个引用文件Swashbuckle.AspNetCore.Swagger 、Swashbuckle.AspNetCore.SwaggerGen、Swashbuckle.AspNetCore.SwaggerUI、Swashbuckle.AspNetCore；然后在startup文件中添加以下代码：
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1",new Microsoft.OpenApi.Models.OpenApiInfo { Title = "myApi", Version = "v1" });
var xmlFile = $"{Assembly.GetEntryAssembly().GetName().Name}.xml";
var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
c.IncludeXmlComments(xmlPath);
});
services.AddMvcCore().AddApiExplorer(); }
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseHsts();
} app.UseHttpsRedirection();
app.UseMvc();
app.UseSwagger();
app.UseSwaggerUI(c =>
{
c.SwaggerEndpoint("/swagger/v1/swagger.json", "myApi");
}); }