获取客户端真实IP的方式

直接上代码：

/**
 * 获取客户端真实IP
 * @param request
 * @return
 */
public String getRemoteIp(HttpServletRequest request){
    String ip = request.getHeader("X-Forwarded-For");
    if (StringUtils.isNotEmpty(ip) && !"unKnow".equalsIgnoreCase(ip)) {
        //多次反向代理后会有多个ip值，第一个ip才是真实ip
        String[] ipList = ip.split(",");
        ip = ipList[0];
    } else {
        ip = request.getHeader("X-Real-IP");
        if (StringUtils.isEmpty(ip) || "unKnown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
    }
    return ip;
}