If your Boxer puppy has a habit of jumping up on you, consider yourself lucky; it's much easier to train a Boxer for jumping when the dog is small, and these lessons will be learned before your pup grows into a much larger adult.
Be sure that everyone in the household is on the same page and reacting in the same way so that the lesson is quickly learned.
1. When your Boxer pup first leaps up toward you, gently yet firmly hold his front paws, preventing him from touching your body.
2. Do not release the paws until your Boxer shows signs that he wishes to be released. When the pup starts to withdraw, let the paws go, and allow him to place them on the ground.
3. As soon as the paws hit the floor, offer enthusiastic praise, rub his head, and give lots of attention. But, do not offer a treat yet.
4. If he tries to jump up on you again, repeat the steps of holding his paws, and only releasing once he wants to drop down.
5. Once it is clear that the pup is not going to attempt to jump up again, give praise (Good boy/girl!) and offer one of your chosen training treats.