How to apply this command to subfolders?

bzip2.exe -z compressfolder/*.*

How should modify it so that it will开发者_如何学JAVA do its job to sub-folders of compressfolder?

You'd better to use "find" utility, however I'm not shure it is available on windows under posix environment.

However:

find compressfolder -type f -print0 | xargs -0 -n 1 bzip2 -z

This command on any *nix system will find each regular file under "compressfolder", and will run "bzip2 -z" for each of the files. If you are using cygwin or mingw (as I suppose), it should work on windows also.

This will compress every file under compressfolder, recursively:

for /r .\compressfolder %%a IN (*.*) do bzip2 -z %%a

The for /r will recurse into each subfolder of .\compressfolder. %%a holds each file specified by *.*, and the part following do runs bzip2 on each file. The above examples assumes you'll run this from the parent folder to the compressfolder. Place the line in a batch file, eg. bzip2all.bat and run it.