Inst High Energy Phys, Beijing 100049, Peoples R China
; Lishui Univ, Dept Phys, Lishui 323000, Peoples R China
; Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200030, Peoples R China
There are different approaches for the hadronic B decay calculations, recently. In this paper, we upgrade three of them, namely factorization, QCD factorization and the perturbative QCD approach based on k(T) factorization, using new parameters and full wave functions. Although they get similar results for many of the branching ratios, the direct CP asymmetries predicted by them are different, which can be tested by recent experimental measurements of B factories.