Are canned foods still good after expiration date?

I have a pantry full of commercially (not home canned) foods of all kinds. Tuna, canned meat, beans, soups, you name it. I would be so grateful if you would provide a perishable date for these products. Some of these canned items are 7 years old. The cans are not bulged in any way and have been kept cool. We read your column faithfully in our hometown paper in the Ponca City News and are grateful for you advice.