java 접속 ip 조회

/* 공인 및 프록시 */
public String getClientIP(HttpServletRequest request) {
    String ip = request.getHeader("확인 X-FORWARDED-FOR");
    
    if(ip == null || ip.length() == 0) {
        ip = request.getHeader("Proxy-Client-IP");
    }
    if(ip == null || ip.length() == 0) {
        ip = request.getHeader("WL-Proxy-Client-IP");  // 웹로직
    }
    if(ip == null || ip.length() == 0) {
        ip = request.getRemoteAddr();
    }
    return ip;
}
 
 
 
 
/* 내부 */
import java.net.*;
 
/* 만약 공인 IP없으면 내부 IP 가져오도록 처리 */
public static String getCurrentEnvironmentNetworkIp(){
    Enumeration netInterfaces = null;
 
    try {
        netInterfaces = NetworkInterface.getNetworkInterfaces();
    } catch (SocketException e) {
        return getLocalIp();
    }
 
    while (netInterfaces.hasMoreElements()) {
        NetworkInterface ni = (NetworkInterface)netInterfaces.nextElement();
        Enumeration address = ni.getInetAddresses();
 
        if (address == null) {
            return getLocalIp();
        }
 
        while (address.hasMoreElements()) {
            InetAddress addr = (InetAddress)address.nextElement();
            
            if (!addr.isLoopbackAddress() && !addr.isSiteLocalAddress() && !addr.isAnyLocalAddress() ) {
                String ip = addr.getHostAddress();
                
                if( ip.indexOf(".") != -1 && ip.indexOf(":") == -1 ){
                    return ip;
                }
            }
        }
    }
 
    return getLocalIp();
}
 
public static String getLocalIp(){
    try {
        return InetAddress.getLocalHost().getHostAddress();
    } catch (UnknownHostException e) {
        return null;
    }
}