Question : search and replace

I need a shell script for search and replace in folder. I want the shell script go to /opt/jboss and search for ejb and replace with servlet. I have command to search for a word but don't have command to search and replace.

find /opt/jboss -exec grep -ls ejb {} \;

Remember mine is solaris 10 OS on sparc box.

Thanks in advance

Answer : search and replace

Ah, there is a typo

find $StartPath -type f -exec grep 'ejb' -ls {} \; | while read FileName

should be

find $StartPath -type f -exec grep -ls 'ejb' {} \; | while read FileName