单选题You need to create a servlet filter that stores all request headers to a database for all requests to the webapplication’s home page "/index.jsp". Which HttpServletRequest method allows you to retrieve all of therequest headers？（）AString[] getHeaderNames（）BString[] getRequestHeaders（）Cjava.util.Iterator getHeaderNames（）Djava.util.Iterator getRequestHeaders（）Ejava.util.Enumeration getHeaderNames（）
单选题
You need to create a servlet filter that stores all request headers to a database for all requests to the webapplication’s home page "/index.jsp". Which HttpServletRequest method allows you to retrieve all of therequest headers？（）
A
String[] getHeaderNames（）
B
String[] getRequestHeaders（）
C
java.util.Iterator getHeaderNames（）
D
java.util.Iterator getRequestHeaders（）
E
java.util.Enumeration getHeaderNames（）
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