Assuming the title of the thread is correct and not the post, we're talking about Spring Attack and not Sneak Attack. In that instance, I would rule that you do one or the other, but you can't combine them. As the rules for Charge state "You must move before your attack, not after....You must stop as soon as you are within striking range of your tarkget. You can't run past him..." That would eliminate the benefit of Spring Attack of moving before and after a melee attack.