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Thesl：shoppingListandsl：itemtagsoutputashoppinglisttotheresponseandareusedasfollows：11.<sl：shoppingList>12.<sl：itemname="Bread"/>13.<sl：itemname="Milk"/>14.<sl：itemname="Eggs"/>15.</sl：shoppingList>Thetaghandlerforsl：shoppingListisShoppingListTagandthetaghandlerforsl：itemisItemSimpleTag.ShoppingListTagextendsBodyTagSupportandItemSimpleTagextendsSimpleTagSupport.Whichistrue？（）

A.ItemSimpleTagcanfindtheenclosinginstanceofShoppingListTagbycallinggetParent（）andcastingtheresulttoShoppingListTag.

B.ShoppingListTagcanfindthechildinstancesofItemSimpleTagbycallingsuper.getChildren（）andcastingeachtoanItemSimpleTag.

C.ItisimpossibleforItemSimpleTagandShoppingListTagtofindeachotherinataghierarchybecauseoneisaSimpletagandtheotherisaClassictag.

D.ShoppingListTagcanfindthechildinstancesofItemSimpleTagbycallinggetChildren（）onthePageContextandcastingeachtoanItemSimpleTag.

E.ItemSimpleTagcanfindtheenclosinginstanceofShoppingListTagbycallingfindAncestorWithClass（）onthePageContextandcastingtheresulttoShoppingListTag.

参考答案

更多 “ Thesl：shoppingListandsl：itemtagsoutputashoppinglisttotheresponseandareusedasfollows：11.sl：shoppingList12.sl：itemname=Bread/13.sl：itemname=Milk/14.sl：itemname=Eggs/15./sl：shoppingListThetaghandlerforsl：shoppingListisShoppingListTagandthetaghandlerforsl：itemisItemSimpleTag.ShoppingListTagextendsBodyTagSupportandItemSimpleTagextendsSimpleTagSupport.Whichistrue？（）A.ItemSimpleTagcanfindtheenclosinginstanceofShoppingListTagbycallinggetParent（）andcastingtheresulttoShoppingListTag.B.ShoppingListTagcanfindthechildinstancesofItemSimpleTagbycallingsuper.getChildren（）andcastingeachtoanItemSimpleTag.C.ItisimpossibleforItemSimpleTagandShoppingListTagtofindeachotherinataghierarchybecauseoneisaSimpletagandtheotherisaClassictag.D.ShoppingListTagcanfindthechildinstancesofItemSimpleTagbycallinggetChildren（）onthePageContextandcastingeachtoanItemSimpleTag.E.ItemSimpleTagcanfindtheenclosinginstanceofShoppingListTagbycallingfindAncestorWithClass（）onthePageContextandcastingtheresulttoShoppingListTag. ” 相关考题
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