添加项目文件。

CoreCms.Net.Swagger/CoreCms.Net.Swagger.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.2.5" />
+    <PackageReference Include="Microsoft.OpenApi" Version="1.2.3" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.2.2" />
+  </ItemGroup>
+
+</Project>

CoreCms.Net.Swagger/CustomApiVersion.cs

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+/***********************************************************************
+ *            Project: CoreCms.Net                                     *
+ *                Web: https://CoreCms.Net                             *
+ *        ProjectName: 核心内容管理系统                                *
+ *             Author: 大灰灰                                          *
+ *              Email: JianWeie@163.com                                *
+ *           Versions: 1.0                                             *
+ *         CreateTime: 2020-02-02 18:53:03
+ *          NameSpace: CoreCms.Net.Framework.Swagger
+ *           FileName: CustomApiVersion
+ *   ClassDescription: 
+ ***********************************************************************/
+
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace CoreCms.Net.Swagger
+{
+    /// <summary>
+    /// 自定义版本
+    /// </summary>
+    public class CustomApiVersion
+    {
+        /// <summary>
+        /// Api接口版本 自定义
+        /// </summary>
+        public enum ApiVersions
+        {
+            /// <summary>
+            /// V1 版本
+            /// </summary>
+            V1 = 1,
+            /// <summary>
+            /// V2 版本
+            /// </summary>
+            V2 = 2,
+        }
+    }
+}

CoreCms.Net.Swagger/CustomRouteAttribute.cs

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+/***********************************************************************
+ *            Project: CoreCms.Net                                     *
+ *                Web: https://CoreCms.Net                             *
+ *        ProjectName: 核心内容管理系统                                *
+ *             Author: 大灰灰                                          *
+ *              Email: JianWeie@163.com                                *
+ *           Versions: 1.0                                             *
+ *         CreateTime: 2020-02-02 18:53:27
+ *          NameSpace: CoreCms.Net.Framework.Swagger
+ *           FileName: CustomRouteAttribute
+ *   ClassDescription: 
+ ***********************************************************************/
+
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.ApiExplorer;
+
+namespace CoreCms.Net.Swagger
+{
+    /// <summary>
+    /// 自定义路由 /api/{version}/[controler]/[action]
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
+    public class CustomRouteAttribute : RouteAttribute, IApiDescriptionGroupNameProvider
+    {
+
+        /// <summary>
+        /// 分组名称,是来实现接口 IApiDescriptionGroupNameProvider
+        /// </summary>
+        public string GroupName { get; set; }
+
+        /// <summary>
+        /// 自定义路由构造函数，继承基类路由
+        /// </summary>
+        /// <param name="actionName"></param>
+        public CustomRouteAttribute(string actionName = "[action]") : base("/api/{version}/[controller]/" + actionName)
+        {
+        }
+        /// <summary>
+        /// 自定义版本+路由构造函数，继承基类路由
+        /// </summary>
+        /// <param name="actionName"></param>
+        /// <param name="version"></param>
+        public CustomRouteAttribute(CustomApiVersion.ApiVersions version, string actionName = "") : base($"/api/{version.ToString()}/[controller]/{actionName}")
+        {
+            GroupName = version.ToString();
+        }
+    }
+}