/**
  * 获取ip地址
  */
 public static String getIpAddress() {
  HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
  String ipAddress = request.getHeader("x-forwarded-for");
  if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
   ipAddress = request.getHeader("Proxy-Client-IP");
  }
  if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
   ipAddress = request.getHeader("WL-Proxy-Client-IP");
  }
  if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
   ipAddress = request.getRemoteAddr();
   if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){
    //根据网卡取本机配置的IP
    InetAddress inet=null;
    try {
     inet = InetAddress.getLocalHost();
    } catch (UnknownHostException e) {
     e.printStackTrace();
    }
    ipAddress= inet.getHostAddress();
   }
  }
  //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照‘,‘分割
  if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15
   if(ipAddress.indexOf(",")>0){
    ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));
   }
  }
  return ipAddress;
 }