HttpServletRequest 获取IP地址

HttpServletRequest request =((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();

public static String getIpAddr(HttpServletRequest request) {
   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;
}