requires brain power(sorta)

ok there's this dude called john,
he leaves his house with a sheep, a wolf, and a basket full of cabbages(cabbage basket), in order to continue his journey he has to cros this river
unforutnetly for him the boat is so small, it can only take john and 1 item with him, but once he satisfies these requirements he can cross back and forth the river as many times as he pleases, but if john takes the wolf , the sheep will eat the cabbages, if he takes the cabbages the wolf will eat the sheep, so how can john take all the items to the other side of the river, AND whats the least amount of trips he has to make to get all items over there?