a-multi-shop-master/code/multiShop/src/com/sky/util/IpProcessUtil.java

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package com.sky.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;

public class IpProcessUtil {
	
	public static String getIpAddr(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.getRemoteAddr();
			
            if(ip.equals("127.0.0.1") || ip.equals("0:0:0:0:0:0:0:1")){  
                //根据网卡取本机配置的IP
                InetAddress inet=null;
                try {
                    inet = InetAddress.getLocalHost();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                }
                ip = inet.getHostAddress();
            }
		}
		
		//对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割  
        if(ip!=null && ip.length()>15){
            if(ip.indexOf(",")>0){  
            	ip = ip.substring(0,ip.indexOf(","));  
            }  
        }
		
		return ip;
	}
	
}