【多选题】
You are creating a new JSP page and you need to execute some code that acts when the page is firstexecuted， but only once.<br /> Which three are possible mechanisms for performing this initialization code？（）
A、In the init method.
B、In the jspInit method.
C、In the constructor of the JSP’s Java code.
D、In a JSP declaration， which includes an initializer block.
E、In a JSP declaration， which includes a static initializer block.
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