How to compute p-Values

Hello.


How can I compute the Bootstrap p-Value for a one- and two sided test, when I have a bootstrap sample of a statistic of 1000 for example?

My hypothesis are for example:

1. Two-Sided: H0: mean=0 vs. H1: mean!=0
2. One Sided: H0: mean>=0 vs. H1: mean<0



I hope you can help me


Thanks in advance


Regards,
Andreas