学习博文：https://www.cnblogs.com/yan7/p/8085410.html
1.使用nuget 安装
<PackageReference Include="AutoMapper" Version="8.0.0" />
<PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="6.0.0" />
2.配置
//添加自动映射
services.AddAutoMapper();