获取请求地址的IP地址

public static String getIpAddr(HttpServletRequest request) throws Exception {
    String ip = request.getHeader("X-Real-IP");
    if(!StringUtils.isNullOrEmptyAfterTrim(ip) && !"unknown".equalsIgnoreCase(ip)) {
        return ip;
    } else {
        ip = request.getHeader("X-Forwarded-For");
        if(!StringUtils.isNullOrEmptyAfterTrim(ip) && !"unknown".equalsIgnoreCase(ip)) {
            int index = ip.indexOf(44);
            return index != -1?ip.substring(0, index):ip;
        } else {
            return request.getRemoteAddr();
        }
    }