A.直接返回會(huì)話對(duì)象 B.當(dāng)服務(wù)器已經(jīng)創(chuàng)建了會(huì)話對(duì)象就返回該對(duì)象,否則返回null C.直接返回null D.當(dāng)服務(wù)器已經(jīng)創(chuàng)建了會(huì)話對(duì)象就返回該對(duì)象,否則新建一個(gè)會(huì)話對(duì)象并返回
A.request.getCookies() B.request.getCookie() C.response.getCookies() D.response.getCookie()
A.ServletConfig B.HttpServlet C.Cookie D.HttpServletRequest