java检测是不是移动端访问

request可以用别的代替

	private static boolean isMobile(){
		HttpServletRequest request = ThreadContextHolder.getHttpRequest();
		if(request==null) return false;
		String user_agent = request.getHeader("user-agent");
		if(StringUtil.isEmpty(user_agent)) return false;
		String userAgent = user_agent.toLowerCase();
		if(userAgent.contains("android" ) || userAgent.contains("iphone"))
		{
			return true;
		}
		return false;	}