获取客户端的真实IP
Posted jimw
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/** * 获取真实IP地址 * <p>使用getRealIP代替该方法</p> * @param request req * @return ip */ public static String getClinetIpByReq(HttpServletRequest request) { // 获取客户端ip地址 String clientIp = request.getHeader("x-forwarded-for"); if (clientIp == null || clientIp.length() == 0 || "unknown".equalsIgnoreCase(clientIp)) { clientIp = request.getHeader("Proxy-Client-IP"); } if (clientIp == null || clientIp.length() == 0 || "unknown".equalsIgnoreCase(clientIp)) { clientIp = request.getHeader("WL-Proxy-Client-IP"); } if (clientIp == null || clientIp.length() == 0 || "unknown".equalsIgnoreCase(clientIp)) { clientIp = request.getRemoteAddr(); } /* * 对于获取到多ip的情况下,找到公网ip. */ String sIP = null; if (clientIp != null && !clientIp.contains("unknown") && clientIp.indexOf(",") > 0) { String[] ipsz = clientIp.split(","); for (String anIpsz : ipsz) { if (!isInnerIP(anIpsz.trim())) { sIP = anIpsz.trim(); break; } } /* * 如果多ip都是内网ip,则取第一个ip. */ if (null == sIP) { sIP = ipsz[0].trim(); } clientIp = sIP; } if (clientIp != null && clientIp.contains("unknown")){ clientIp =clientIp.replaceAll("unknown,", ""); clientIp = clientIp.trim(); } if ("".equals(clientIp) || null == clientIp){ clientIp = "127.0.0.1"; } return clientIp; } /** * 判断IP是否是内网地址 * @param ipAddress ip地址 * @return 是否是内网地址 */ public static boolean isInnerIP(String ipAddress) { boolean isInnerIp; long ipNum = getIpNum(ipAddress); /** 私有IP:A类 10.0.0.0-10.255.255.255 B类 172.16.0.0-172.31.255.255 C类 192.168.0.0-192.168.255.255 当然,还有127这个网段是环回地址 **/ long aBegin = getIpNum("10.0.0.0"); long aEnd = getIpNum("10.255.255.255"); long bBegin = getIpNum("172.16.0.0"); long bEnd = getIpNum("172.31.255.255"); long cBegin = getIpNum("192.168.0.0"); long cEnd = getIpNum("192.168.255.255"); isInnerIp = isInner(ipNum, aBegin, aEnd) || isInner(ipNum, bBegin, bEnd) || isInner(ipNum, cBegin, cEnd) || ipAddress.equals("127.0.0.1"); return isInnerIp; } private static long getIpNum(String ipAddress) { String[] ip = ipAddress.split("\."); long a = Integer.parseInt(ip[0]); long b = Integer.parseInt(ip[1]); long c = Integer.parseInt(ip[2]); long d = Integer.parseInt(ip[3]); return a * 256 * 256 * 256 + b * 256 * 256 + c * 256 + d; } private static boolean isInner(long userIp, long begin, long end) { return (userIp >= begin) && (userIp <= end); }
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