如何在.Net Core3.1统一框架中使用配置文件

{
  "Database": {
    "ConnectionString": "Server=127.0.0.1;Database=myDb;User Id=myUser;Password=myPassword;"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  }
}

public void ConfigureServices(IServiceCollection services)
{
    // 添加配置文件
    services.Configure<DatabaseOptions>(Configuration.GetSection("Database"));
}

public class DatabaseOptions
{
    public string ConnectionString { get; set; }
}

public class HomeController : Controller
{
    private readonly DatabaseOptions _databaseOptions;

    public HomeController(IOptions<DatabaseOptions> databaseOptions)
    {
        _databaseOptions = databaseOptions.Value;
    }

    public IActionResult Index()
    {
        string connectionString = _databaseOptions.ConnectionString;
        // 使用连接字符串进行数据库操作
        return View();
    }
}