获取访问项目的用户的IP地址

package com.baizhi.util;

import javax.servlet.http.HttpServletRequest;

/**
 * Created by lbypc on 2019/1/10.
 */
public class IPKit {
    /**
     * @param request 请求
     * @return IP Address
     */
    public static String getIpAddrByRequest(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();
        }

        return ip;
    }
}