As far as exercises go for working on vertical explosiveness and power, you wont find many better than the hang clean exercise. This exercise is going to focus on the athletes legs and core strength, which are both extremely important for a basketball player. Along with improving the players strength and explosiveness though, hang cleans are great for opening up the hips of the player and allowing them better range of motion. This is really important in athletics because the more a player can load up, the more they can generate force. Players that are stiff and have trouble with flexibility, also tend to struggle with being able to make athletic movements.
This hang clean exercise will translate into so many different on court skills, and it should be done by every basketball player that is old enough. However, it is a complicated exercise, and it is very important that it is learned the correct way before attempting. Really focus in on form for this basketball exercises, and don't go up to a heavy weight until you have mastered the movement.