获取客户端真实ip

现在都流行显示 ip 归属地，那么我先来获取客户端的真实 ip 地址以及 mac 地址，上代码

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.UnknownHostException;
/**
 * 常用获取客户端信息的工具
 */
public class NetworkUtil {

    /**
     * 获取ip地址
     */
    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();
        }
        // 本机访问
        if ("localhost".equalsIgnoreCase(ip) || "127.0.0.1".equalsIgnoreCase(ip) || "0:0:0:0:0:0:0:1".equalsIgnoreCase(ip)){
            // 根据网卡取本机配置的IP
            InetAddress inet;
            try {
                inet = InetAddress.getLocalHost();
                ip = inet.getHostAddress();
            } catch (UnknownHostException e) {
                e.printStackTrace();
            }
        }
        // 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 (null != ip && ip.length() > 15) {
            if (ip.indexOf(",") > 15) {
                ip = ip.substring(0, ip.indexOf(","));
            }
        }
        return ip;
    }

    /**
     * 获取mac地址
     */
    public static String getMacAddress() throws Exception {
        // 取mac地址
        byte[] macAddressBytes = NetworkInterface.getByInetAddress(InetAddress.getLocalHost()).getHardwareAddress();
        // 下面代码是把mac地址拼装成String
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < macAddressBytes.length; i++) {
            if (i != 0) {
                sb.append("-");
            }
            // mac[i] & 0xFF 是为了把byte转化为正整数
            String s = Integer.toHexString(macAddressBytes[i] & 0xFF);
            sb.append(s.length() == 1 ? 0 + s : s);
        }
        return sb.toString().trim().toUpperCase();
    }

}

好了，ip 获取到了至于查询 ip 归属地嘛
Ip2region