当项目发布在内网的时候，主机（如IP地址为192.168.10.88）访问局域网服务器的url，如http://192.168.10.142:8080/index/，用request.getRemoteAddr()获取到的主机IP地址是192.168.10.142，而不是真实的IP地址192.168.10.88。为了解决这个问题，可以采用以下方法避免该问题产生。
public static String getIpAddress(HttpServletRequest request) {
String ip = request.getHeader("x-forwarded-for");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip.equals("0:0:0:0:0:0:0:1") ? "127.0.0.1" : ip;
}当服务器和主机是同一台机器时，获取到的地址是0:0:0:0:0:0:0:1,0:0:0:0:0:0:0:1是ipv6的表现形式，对应ipv4来说相当于127.0.0.1。很多说法是hosts文件（C:\Windows\System32\drivers\etc文件夹下）的#::1 localhost（ipv6）这一行注释掉就可以获取到127.0.0.1，但是我尝试了没有效果。所以用了三目运算符赋值为127.0.01。
本文出自 “hualiued” 博客，请务必保留此出处http://hualiued.blog.51cto.com/11510677/1887295
原文地址：http://hualiued.blog.51cto.com/11510677/1887295
