xampp 配置二级子域名

<VirtualHost *:80>
    ServerAdmin webmaster@dummy-host2.example.com
    DocumentRoot "E:/XAMPP/htdocs/frontend
    ##ServerName test.net
    ServerAlias  www.test.net test.net
    ##ErrorLog "logs/dummy-host2.example.com-error.log"
    ##CustomLog "logs/dummy-host2.example.com-access.log" common
</VirtualHost>

<VirtualHost *:80>
    ServerAdmin webmaster@dummy-host.example.com
    DocumentRoot "E:/XAMPP/htdocs/backend"
    ##ServerName  test.net
    ServerAlias  api.test.net
    ##ErrorLog "logs/dummy-host.example.com-error.log"
    ##CustomLog "logs/dummy-host.example.com-access.log" common
</VirtualHost>