A.HttpServletRequest、getContextPath() B.HttpServletRequset、getPathInfo() C.ServletContext、getContextPath() D.ServletContext、getPathInfo()
A.<filter> B.<filter-mapping> C.<filter-name> D.<filter-class>
A. HttpServlet是一個(gè)抽象類 B. HttpServlet類擴(kuò)展了GenericServlet類 C. HttpServlet類的子類必須至少重寫service方法 D. HttpServlet位于javax.servlet.http包中