we had the same problem with our 6 month old male. we tried the knee in the chest and that seemed to help. he now only jumps at you when he wants to greet you if he hasn't seen you for a while.
I still put my knee to his chest when he does but he is so stubborn that he doesn't mind. :-\
I still put my knee to his chest when he does but he is so stubborn that he doesn't mind. :-\