IPUtil

package com.koubei.util;

import javax.servlet.http.HttpServletRequest;

/**
 * IP处理工具类
 * 
 * @author zhanqiong
 * 
 */
public class IPUtil {

    /**
     * 获取真实IP:
     *    先取
     * @param request
     * @return
     */
    public static String getClientIP(HttpServletRequest request) {
        String ip = request.getHeader("X-Real-IP");
        if (StringUtil.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("X-Forwarded-For");
        }
        if (StringUtil.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        
        return ip;
    }

    /**
     * IP转成数字类型
     * 
     * @param strIP
     * @return
     */
    public static long ipToLong(String strIP) {
        long[] ip = new long[4];
        int position1 = strIP.indexOf(".");
        int position2 = strIP.indexOf(".", position1 + 1);
        int position3 = strIP.indexOf(".", position2 + 1);
        ip[0] = Long.parseLong(strIP.substring(0, position1));
        ip[1] = Long.parseLong(strIP.substring(position1 + 1, position2));
        ip[2] = Long.parseLong(strIP.substring(position2 + 1, position3));
        ip[3] = Long.parseLong(strIP.substring(position3 + 1));
        // ip1*256*256*256+ip2*256*256+ip3*256+ip4
        return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];
    }

    /**
     * 是否是本地IP
     * 
     * @param strIp
     * @return
     */
    public static boolean isLocal(String strIp) {
        if ("127.0.0.1".equals(strIp))
            return true;
        long l = ipToLong(strIp);
        if (l >= 3232235520L)
            return l <= 3232301055L;
        return (l >= 167772160L) && (l <= 184549375L);
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        System.out.println("202.102.249.59:"
                + Long.toString(IPUtil.ipToLong("202.102.249.59")));
        System.out.println("202.102.249.59 is local ip:"
                + Boolean.toString(IPUtil.isLocal("202.102.249.59")));
        System.out.println("127.0.0.1:"
                + Long.toString(IPUtil.ipToLong("127.0.0.1")));
        System.out.println("127.0.0.1 is local ip:"
                + Boolean.toString(IPUtil.isLocal("127.0.0.1")));
        System.out.println("10.9.1.134:"
                + Long.toString(IPUtil.ipToLong("10.9.1.134")));
        System.out.println("10.9.1.134 is local ip:"
                + Boolean.toString(IPUtil.isLocal("10.9.1.134")));

    }
}