Struts 1 has reached EOL stage and it is no longer under active development.
Struts 2 is now carrying the flag and for a good reason.
Struts 2 (WebWork) is built upon simplicity, flexibility and plugins architecture.
http://struts.apache.org/2.x/
Struts 1 served the community very well in the past but it has to retire now, frameworks like Seam, Wicket are really rasing the bar so high.
So, unless you need Struts 1 for your job, just drop it and don't bother your self with it.