JSP中获取一些服务器变量

JSP中获取相应的服务器变量（包括HTTP头中的变量）的方法：
SERVER_NAME request.getServerName();
SERVER_SOFTWARE request.getServletContext().getServerInfo();
SERVER_PROTOCOL request.getProtocol();
SERVER_PORT request.getServerPort()
REQUEST_METHOD request.getMethod()
PATH_INFO request.getPathInfo()
PATH_TRANSLATED request.getPathTranslated()
SCRIPT_NAME request.getServletPath()
DOCUMENT_ROOT request.getRealPath("/")
QUERY_STRING request.getQueryString()
REMOTE_HOST request.getRemoteHost()
REMOTE_ADDR request.getRemoteAddr()
AUTH_TYPE request.getAuthType()
REMOTE_USER request.getRemoteUser()
CONTENT_TYPE request.getContentType()
CONTENT_LENGTH request.getContentLength()
HTTP_ACCEPT request.getHeader("Accept")
HTTP_USER_AGENT request.getHeader("User-Agent")
HTTP_REFERER request.getHeader("Referer")