Whichthe threearetrueaboutservletfilters？（）

A.Afiltermustimplementthedestroymethod
B.AfiltermustimplementthedoFiltermethod
C.Aservletmayhavemultiplefiltersassociatedwithit
D.Aservletthatistohaveafilterappliedtoitmustimplementthejavax.servlet.FilterChaininterface
E.AfilterthatispartofafilterchainpassescontroltothenextfilterinthechainbyinvokingthefilterChainforwardmethod
F.Foreachelementinthewebapplicationdeploymentdescriptor，multipleinstancesofafiltermaybecreatedbythewebcontainer

【参考答案】

A, B, C