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package com.gcloud.common;import javax.servlet.http.HttpServletRequest;import java.net.InetAddress;import java.net.NetworkInterface;import java.net.SocketException;import java.net.UnknownHostException;import java.util.Enumeration;import java.util.regex.Matcher;import java.util.regex.Pattern;/** * ip工具类 * Created by charlin on 2017/9/9. */public class IPUtil {
       /**     * 检查IP是否合法     * @param ip     * @return     */    public static boolean ipValid(String ip) {        String regex0 = "(2[0-4]\\d)" + "|(25[0-5])";        String regex1 = "1\\d{2}";        String regex2 = "[1-9]\\d";        String regex3 = "\\d";        String regex = "(" + regex0 + ")|(" + regex1 + ")|(" + regex2 + ")|(" + regex3 + ")";        regex = "(" + regex + ").(" + regex + ").(" + regex + ").(" + regex  + ")";        Pattern p = Pattern.compile(regex);        Matcher m = p.matcher(ip);        return m.matches();    }    /**     * 获取本地ip 适合windows与linux     *     * @return     */    public static String getLocalIP() {        String localIP = "127.0.0.1";        try {            Enumeration netInterfaces = NetworkInterface.getNetworkInterfaces();            while (netInterfaces.hasMoreElements()) {                NetworkInterface ni = (NetworkInterface) netInterfaces.nextElement();                InetAddress ip = ni.getInetAddresses().nextElement();                if (!ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1) {                    localIP = ip.getHostAddress();                    break;                }            }        } catch (Exception e) {            try {                localIP = InetAddress.getLocalHost().getHostAddress();            } catch (UnknownHostException e1) {                e1.printStackTrace();            }        }        return localIP;    }    /**     * 获取客户机的ip地址     * @param request     * @return     */    public static String getClientIp(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 == 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");        }        // 如果是多级代理，那么取第一个ip为客户ip        if (ip != null && ip.indexOf(",") != -1) {            ip = ip.substring(ip.lastIndexOf(",") + 1, ip.length()).trim();        }        return ip;    }    /**     * 把ip转化为整数     * @param ip     * @return     */    public static long translateIP2Int(String ip){        String[] intArr = ip.split("\\.");        int[] ipInt = new int[intArr.length];        for (int i = 0; i 

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