工具类分享之《IpUtil》

前言

在企业开发中获取IP地址是个常见的使用，今天给大家分享个获取IP的工具类，希望能在开发中帮助到你，代码注释写的还算详细，这里就不在多说了。

代码实现

package com.zhuma.demo.util;import java.net.InetAddress;import java.net.NetworkInterface;import java.net.UnknownHostException;import java.util.Enumeration;import java.util.regex.Matcher;import java.util.regex.Pattern;import javax.servlet.http.HttpServletRequest;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * @desc IP操作工具类 *  * @author zhumaer * @since 6/20/2017 16:37 PM */public class IpUtil {    private static final Logger LOGGER = LoggerFactory.getLogger(AESUtil.class);    private static final String ipPattern = "^(?:(?:[01]?\\d{1,2}|2[0-4]\\d|25[0-5])\\.){3}(?:[01]?\\d{1,2}|2[0-4]\\d|25[0-5])\\b";    /**     * @Description: 获取请求中的ip地址：过了多级反向代理，获取的ip不是唯一的，二是包含中间代理层ip。     *      * @return 可能有多个，例如：192.168.1.110， 192.168.1.120     */    public static String getIpAddr(HttpServletRequest request) {        String ip = "127.0.0.1";        if (request != null) {            ip = request.getHeader("x-forwarded-for");            if (StringUtil.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {                ip = request.getHeader("Proxy-Client-IP");            }            if (StringUtil.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {                ip = request.getHeader("WL-Proxy-Client-IP");            }            if (StringUtil.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {                ip = request.getRemoteAddr();            }        }        return ip;    }    /**     *      * @Description: 获取客户端请求中的真实的ip地址     *      * 获取客户端的IP地址的方法是：request.getRemoteAddr()，这种方法在大部分情况下都是有效的。     * 但是在通过了Apache，Squid等反向代理软件就不能获取到客户端的真实IP地址。而且，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，     * 而是一串ip值，例如：192.168.1.110， 192.168.1.120， 192.168.1.130， 192.168.1.100。其中第一个192.168.1.110才是用户真实的ip     */    public static String getRealIp(HttpServletRequest request) {        String ip = "127.0.0.1";        if (request == null) {            return ip;        }        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();            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();                    ip = inet.getHostAddress();                } catch (UnknownHostException e) {                    LOGGER.error("getRealIp occurs error, caused by: ", e);                }            }        }        if (ip != null && ip.length() > 15) { //"***.***.***.***".length() = 15              if (ip.indexOf(",") > 0) {                ip = ip.substring(0, ip.indexOf(","));            }        }        return ip;    }    /**     * 获取服务器IP     */    public static String getServiceIp() {        Enumeration<NetworkInterface> netInterfaces = null;        String ipsStr = "";        try {            netInterfaces = NetworkInterface.getNetworkInterfaces();            while (netInterfaces.hasMoreElements()) {                NetworkInterface ni = netInterfaces.nextElement();                Enumeration<InetAddress> ips = ni.getInetAddresses();                Pattern pattern = Pattern.compile(ipPattern);                while (ips.hasMoreElements()) {                    String ip = ips.nextElement().getHostAddress();                    Matcher matcher = pattern.matcher(ip);                    if (matcher.matches() && !ip.equals("127.0.0.1")) {                        ipsStr = ip;                    }                }            }        } catch (Exception e) {            LOGGER.error("getServiceIp occurs error, caused by: ", e);        }        return ipsStr;    }}

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