The color of the background doesn't matter so much as the brightness of the subject. A white background won't interfere unless it is lit brighter than the subject. If the white background is intensely lit however, then either spot or center weighted would work. If you have a good spot you know you want to base your exposure on, then spot would be fine. If you have a fair range of intensity over the subject though, then spot metering may not do ideally and you would want to try center weighted, which will try to give you the best exposure overall, but with the center given extra consideration.
If you have an evaluative mode, it may also be smart enough to consider that the background is very bright and adjust for the subject.