在Servlet中要输出内容，对于二进制类型调用（）获得ServeltOutputStream的输入流。

A.ServletInputStream
B.ServletContext
C.HttpServletRequest
D.setContentType
E.getInputStream
F.getOutputStream
G.getRequestDispatcher
H.RequestDispatcher
I.getParameter
J.ServeltOutputStream
K.getWriter

A.ServletInputStream
B.ServletContext
C.HttpServletRequest
D.setContentType

A.publicvoiddoGet（ServletRequestreq，ServletResponseres）throwsIOException，ServletException
B.publicvoiddoPost（HttpServletRequestreq，HttpServletResponseres）throwsIOException，ServletException
C.publicvoidservice（HttpServletRequestreq，HttpServletResponseres）throwsIOException，ServletException
D.publicvoidservice（ServletRequestreq，ServletResponseres）throwsIOException，ServletException