content: package com.ruoyi.common.utils;
  
  import java.net.InetAddress;
  import java.net.UnknownHostException;
  import javax.servlet.http.HttpServletRequest;
  
  /**
   * 获取IP方法
   * 
   * @author ruoyi
   */
  public class IpUtils
  {
      public static String getIpAddr(HttpServletRequest request)
      {
          if (request == null)
          {
              return "unknown";
          }
          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("X-Forwarded-For");
          }
          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.getHeader("X-Real-IP");
          }
  
          if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
          {
              ip = request.getRemoteAddr();
          }
  
          return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : ip;
      }
  
      public static boolean internalIp(String ip)
      {
          byte[] addr = textToNumericFormatV4(ip);
          return internalIp(addr) || "127.0.0.1".equals(ip);
      }
  
      private static boolean internalIp(byte[] addr)
      {
          final byte b0 = addr[0];
          final byte b1 = addr[1];
          // 10.x.x.x/8
          final byte SECTION_1 = 0x0A;
          // 172.16.x.x/12
          final byte SECTION_2 = (byte) 0xAC;
          final byte SECTION_3 = (byte) 0x10;
          final byte SECTION_4 = (byte) 0x1F;
          // 192.168.x.x/16
          final byte SECTION_5 = (byte) 0xC0;
          final byte SECTION_6 = (byte) 0xA8;
          switch (b0)
          {
              case SECTION_1:
                  return true;
              case SECTION_2:
                  if (b1 >= SECTION_3 && b1 <= SECTION_4)
                  {
                      return true;
                  }
              case SECTION_5:
                  switch (b1)
                  {
                      case SECTION_6:
                          return true;
                  }
              default:
                  return false;
          }
      }
  
      /**
       * 将IPv4地址转换成字节
       * 
       * @param text IPv4地址
       * @return byte 字节
       */
      public static byte[] textToNumericFormatV4(String text)
      {
          if (text.length() == 0)
          {
              return null;
          }
  
          byte[] bytes = new byte[4];
          String[] elements = text.split("\\.", -1);
          try
          {
              long l;
              int i;
              switch (elements.length)
              {
                  case 1:
                      l = Long.parseLong(elements[0]);
                      if ((l < 0L) || (l > 4294967295L))
                          return null;
                      bytes[0] = (byte) (int) (l >> 24 & 0xFF);
                      bytes[1] = (byte) (int) ((l & 0xFFFFFF) >> 16 & 0xFF);
                      bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
                      bytes[3] = (byte) (int) (l & 0xFF);
                      break;
                  case 2:
                      l = Integer.parseInt(elements[0]);
                      if ((l < 0L) || (l > 255L))
                          return null;
                      bytes[0] = (byte) (int) (l & 0xFF);
                      l = Integer.parseInt(elements[1]);
                      if ((l < 0L) || (l > 16777215L))
                          return null;
                      bytes[1] = (byte) (int) (l >> 16 & 0xFF);
                      bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
                      bytes[3] = (byte) (int) (l & 0xFF);
                      break;
                  case 3:
                      for (i = 0; i < 2; ++i)
                      {
                          l = Integer.parseInt(elements[i]);
                          if ((l < 0L) || (l > 255L))
                              return null;
                          bytes[i] = (byte) (int) (l & 0xFF);
                      }
                      l = Integer.parseInt(elements[2]);
                      if ((l < 0L) || (l > 65535L))
                          return null;
                      bytes[2] = (byte) (int) (l >> 8 & 0xFF);
                      bytes[3] = (byte) (int) (l & 0xFF);
                      break;
                  case 4:
                      for (i = 0; i < 4; ++i)
                      {
                          l = Integer.parseInt(elements[i]);
                          if ((l < 0L) || (l > 255L))
                              return null;
                          bytes[i] = (byte) (int) (l & 0xFF);
                      }
                      break;
                  default:
                      return null;
              }
          }
          catch (NumberFormatException e)
          {
              return null;
          }
          return bytes;
      }
  
      public static String getHostIp()
      {
          try
          {
              return InetAddress.getLocalHost().getHostAddress();
          }
          catch (UnknownHostException e)
          {
          }
          return "127.0.0.1";
      }
  
      public static String getHostName()
      {
          try
          {
              return InetAddress.getLocalHost().getHostName();
          }
          catch (UnknownHostException e)
          {
          }
          return "未知";
      }
  }