      public static String getClientIP(HttpServletRequest request) {String ip = request.getHeader( "X-Forwarded-For" );if (StringUtils.isNotEmpty(ip) && ! "unKnown" .equalsIgnoreCase(ip)) {// 多次反向代理后会有多个ip值，第一个ip才是真实ipint index = ip.indexOf( "," );if (index != - 1 ) {return ip.substring( 0 , index);}  else {return ip;}}ip = request.getHeader( "X-Real-IP" );if (StringUtils.isNotEmpty(ip) && ! "unKnown" .equalsIgnoreCase(ip)) {return ip;}return request.getRemoteAddr();}
Original: https://www.cnblogs.com/aoshiguchen/p/6707173.html
Author: 傲世孤尘
Title: javaweb获取客户端真实ip
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