/**	 * 获取客户端IP	 * @param request	 * @return	 */	private String getRemoteAddr(HttpServletRequest request) {		String ip = request.getHeader("X-Real-IP");		if (!StringUtils.isBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {			return ip;		}		ip = request.getHeader("X-Forwarded-For");		if (!StringUtils.isBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {			// 多次反向代理后会有多个IP值，第一个为真实IP。			int index = ip.indexOf(',');			if (index != -1) {				return ip.substring(0, index);			} else {				return ip;			}		} else {			return request.getRemoteAddr();		}	}