To import an SSIS dtsx package into SQL Server, use can use the
DTUTIL utility with the following syntax:
dtutil /FILE <name>.dtsx /DESTSERVER SQLServer /COPY
SQL;<name>
To import multiple SSIS dtsx packages into SQL Server, you can
use a combination of the DTUTIL utility and the FOR batch command
to load each dtsx file in a directory.
Execute the following command at a command prompt or from a
command or batch file.
FOR %i In (*.dtsx) DO dtutil /FILE %i /DESTSERVER SQLServer
/COPY SQL;DTSX_%~ni