Think Pre workout, Body Conditioning, Core Training, Recovery
Pre workout: Warm up correctly with low intensity actions (very important, you don't wanna get caught cold or you will risk injury), dynamic flexibility made by resembling basketball actions while stretching remember you are training to be a basketball player here and not an olympic weight lifter so train for movements then train for muscle.
Body Conditioning: glutes bridges, quads i.e. Squats or squat jumps you can never go wrong with this, hamstrings hamstring curls, calves (one legged hops, heck even skipping is good), abductors, practice dunks (remember resembling real basketball moves)
Recovery: foam roller!! Relaxation isn't just to alleviate stress in the evening after work but it is exactly the same thing for physical workout. The body feels consumed with stress and transmits lots of stress signals to your brain therefore the more you relax the faster the recovery rate, the greater results you're going to get!
My source:
http://how-to-dunk.com