[单选]
In your web application，you need to execute a block of code whenever the session object is first created.
Which design will accomplish this goal？（）

A . Create an HttpSessionListener class and implement the sessionInitialized method with that block ofcode.
B . Create an HttpSessionActivationListener class and implement the sessionCreated method with thatblock of code.
C . Create a Filter class， call the getSession（false） method， and if the result was null， then execute that block of code.
D . Create an HttpSessionListener class and implement the sessionCreated method with that block of code.

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In your web application，you need to execute a block of code whenever the session object is first created.
Which design will accomplish this goal？（）

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[单选] In your web application，you need to execute a block of code whenever the session object is first created. Which design will accomplish this goal？（）

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[单选]
In your web application，you need to execute a block of code whenever the session object is first created.
Which design will accomplish this goal？（）