java类如何得到SESSION

/**
	 * 设置数据导入在线数据
	 * 
	 * @param request HttpServletRequest
	 * @param importOnLineVO ImportOnLineVO
	 */
	public void setImportOnLineInfo(HttpServletRequest request, ImportOnLineVO importOnLineVO) {
		request.getSession().removeAttribute(AuthorTokenProperty.SESSION_IMPORT_ONLINE);
		request.getSession().setAttribute(AuthorTokenProperty.SESSION_IMPORT_ONLINE, importOnLineVO);
	}

 用REQUEST.GETSESSION