单选题Which interface must a class implement so that instances of the class are notified after any object is addedto a session？（）A javax.servlet.http.HttpSessionListenerB javax.servlet.http.HttpSessionValueListenerC javax.servlet.http.HttpSessionBindingListe
题目
单选题
Which interface must a class implement so that instances of the class are notified after any object is addedto a session？（）
A
javax.servlet.http.HttpSessionListener
B
javax.servlet.http.HttpSessionValueListener
C
javax.servlet.http.HttpSessionBindingListener
D
javax.servlet.http.HttpSessionAttributeListener