How to forward from a validate in struts

Hello guys!

Writing in english because I'm from sweden.
(I bet you understand my english better then my danish)

I'm looking for a best practice for error handling during validation in Struts.

Suppose you extend ActionSupport and in the validate you perhaps doing some DB fetching and that fetching went wrong. Then I would like to forward to some general error page. But I can not find an example.

Suppose you do it like:

public void validate()
    {
          try
          {
                    //Something goes very wrong
          }   
        catch(Exception e)
        {
            //Then forward to a general errorpage
        }
    }

Since validate do not return any String (for forwarding) like execute, how do I forward the response to anything else then gong in to execute?

Or should I have a boolean "toGlobalError" member and set to true in the catch and in execute check that member first?

If you guys got any ideas please let me know!
Best regards
/Fredrik