Remove whitespaces between comma separated fields from file

Hello all,

I am a unix dummy. I am trying to remove spaces between fields. I have the file in the following format

12332432, 2345 , asdfsdf ,100216 , 9999999
12332431, 2341 , asdfsd2 ,100213 , 9999999

& would like to make it

12332432,2345,asdfsdf,100216,9999999
12332431,2341,asdfsd2,100213,9999999

I would appreciate it greatly if there is a command to do this.

Thanks
Nitin

sed 's/ //g' infile > outfile

or

awk '{$1=$1;OFS=""}1' infile > outfile

The sed command did not give me what I was looking for but the awk worked great

Thanks a million
NJ