action里获得ip地址

public String getIpaddress() {
    String ip = getIpaddress(ServletActionContext.getRequest());
    return ip;
  }

  public static String getIpaddress(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;
  }