问答题

Given：3.publicclassMyTagHandlerextendsTagSupport{4.publicintdoStartTag（）{5.//insertcodehere6.//returnanint7.}8.//morecodehere...18.}Thereisasingleattributefoointhesessionscope.Whichthreecodefragments，insertedindependentlyatline5，returnthevalueoftheattribute？（）
A.Objecto=pageContext.getAttribute（"foo"）；
B.Objecto=pageContext.findAttribute（"foo"）；
C.Objecto=pageContext.getAttribute（"foo"，PageContext.SESSION_SCOPE）；
D.HttpSessions=pageContext.getSession（）；Objecto=s.getAttribute（"foo"）；

A.publicclassMyTagHandlerextendsTagSupport{4.publicintdoStartTag（）{5.//insertcodehere6.//returnanint7.}8.//morecodehere...18.}Thereisasingleattributefoointhesessionscope.Whichthreecodefragments，insertedindependentlyatline5，returnthevalueoftheattribute？（）
A.Objecto=pageContext.getAttribute（"foo"）；
B.Objecto=pageContext.findAttribute（"foo"）；
C.Objecto=pageContext.getAttribute（"foo"，PageContext.SESSION_SCOPE）；
D.HttpSessions=pageContext.getSession（）；Objecto=s.getAttribute（"foo"）；

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