Nope. Everybody has their own mount system, and usually the autofocus systems are incompatible as well (even if you could mount it, it would be manual focus).
One of the nice things about DSLRs is that
they have APS-C sized CMOS sensors (the full frame models are extremely expensive), so the lenses are smaller and lighter than the 35mm film lenses. It makes for an easier package to haul around, but you will also have to remember that the field of view at a given focal length will be smaller (a 31mm DSLR lens gives the same field of view you had at 50mm with a 35mm camera).