前言：

java版获取IP地址源码哈。

获取请求端的ip地址源码，最近不是要求各大平台显示IP归属地吗？要获取用户的IP地址保存到数据库，然后通过IP地址归属地相关组件转换成归属地显示出来，本源码是获取访问者的IP地址源码，全部代码IpUtils.java如下。

相关代码：

package com.txwb.common.utils;

import org.apache.log4j.Logger;

import javax.servlet.http.HttpServletRequest;

/**
 * @description:
 */
public class IpUtils {
    private static Logger logger = Logger.getLogger(IpUtils.class);

    /**
     * 获取请求主机IP地址,如果通过代理进来，则透过防火墙获取真实IP地址;
     * @param request
     * @return ip 地址
     */
    public final static String getIpAddress(HttpServletRequest request){
        // 获取请求主机IP地址,如果通过代理进来，则透过防火墙获取真实IP地址
        String ip = request.getHeader("X-Forwarded-For");
        if (logger.isInfoEnabled()) {
            logger.info("getIpAddress(HttpServletRequest) - X-Forwarded-For - String ip=" + ip);
        }

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
                if (logger.isInfoEnabled()) {
                    logger.info("getIpAddress(HttpServletRequest) - Proxy-Client-IP - String ip=" + ip);
                }
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
                if (logger.isInfoEnabled()) {
                    logger.info("getIpAddress(HttpServletRequest) - WL-Proxy-Client-IP - String ip=" + ip);
                }
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_CLIENT_IP");
                if (logger.isInfoEnabled()) {
                    logger.info("getIpAddress(HttpServletRequest) - HTTP_CLIENT_IP - String ip=" + ip);
                }
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
                if (logger.isInfoEnabled()) {
                    logger.info("getIpAddress(HttpServletRequest) - HTTP_X_FORWARDED_FOR - String ip=" + ip);
                }
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
                if (logger.isInfoEnabled()) {
                    logger.info("getIpAddress(HttpServletRequest) - getRemoteAddr - String ip=" + ip);
                }
            }
        } else if (ip.length() > 15) {
            String[] ips = ip.split(",");
            for (int index = 0; index < ips.length; index++) {
                String strIp = (String) ips[index];
                if (!("unknown".equalsIgnoreCase(strIp))) {
                    ip = strIp;
                    break;
                }
            }
        }
        return ip;
    }

}