content: package com.platform.utils;
  
  import javax.servlet.http.HttpServletRequest;
  import java.net.*;
  import java.util.Enumeration;
  
  public class IPUtil {
  
      public static String getLocalIP() throws SocketException {
          String localIP = null;
          Enumeration allNetInterfaces = NetworkInterface.getNetworkInterfaces();
          InetAddress ip = null;
          while (allNetInterfaces.hasMoreElements()) {
              NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
              Enumeration addresses = netInterface.getInetAddresses();
              while (addresses.hasMoreElements()) {
                  ip = (InetAddress) addresses.nextElement();
                  if (ip != null && ip instanceof Inet4Address) {
                      localIP = ip.getHostAddress();
                      if (!"127.0.0.1".equalsIgnoreCase(localIP)) {
                          return localIP;
                      }
                  }
              }
          }
          return localIP;
      }
  
      /**
       * 获取当前网络ip
       * @param request
       * @return
       */
      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;
      }
  }
  