Big jumping Dog with no manners

I have a friend that has a large dog that likes to jump up on me every time I go over there.I don't like this as it scratches me and nearly pushes me over. I have tryed the knee up, and the turn your back to them trick but the dog starts niping at my arms legs and bottom. I have talked to my friend about it and they said there's nothing they can do about it. So I said how about can you put the leash on the dog when I get here. He said he can't be bothered doing that and if I don't like it don't come over…. Yes I know just don't go over there anymore. . . But it's not that simple unfortunately. Has anyone found a way to get a dog to stop jumping up without hitting them or hurting them in any way. Thank you for any help !!!!