content: package com.platform.rpc.util;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  import java.net.Inet6Address;
  import java.net.InetAddress;
  import java.net.NetworkInterface;
  import java.net.UnknownHostException;
  import java.util.Enumeration;
  import java.util.regex.Pattern;
  
  /**
   *
   * @author AllDataDC
   * @date 2023/3/26 11:14
   * IP的工具类
   **/
  public class IpUtil {
  	private static final Logger logger = LoggerFactory.getLogger(IpUtil.class);
  
  	private static final String ANYHOST_VALUE = "0.0.0.0";
  	private static final String LOCALHOST_VALUE = "127.0.0.1";
  	private static final Pattern IP_PATTERN = Pattern.compile("\\d{1,3}(\\.\\d{1,3}){3,5}$");
  
  
  	private static volatile InetAddress LOCAL_ADDRESS = null;
  
  
  	private static InetAddress toValidAddress(InetAddress address) {
  		if (address instanceof Inet6Address) {
  			Inet6Address v6Address = (Inet6Address) address;
  			if (isPreferIPV6Address()) {
  				return normalizeV6Address(v6Address);
  			}
  		}
  		if (isValidV4Address(address)) {
  			return address;
  		}
  		return null;
  	}
  
  	/**
  	 *
  	 * @return
  	 */
  	private static boolean isPreferIPV6Address() {
  		return Boolean.getBoolean("java.net.preferIPv6Addresses");
  	}
  
  	/**
  	 *
  	 * @param address
  	 * @return 判断是不是有效的IPV4的地址
  	 */
  	private static boolean isValidV4Address(InetAddress address) {
  		if (address == null || address.isLoopbackAddress()) {
  			return false;
  		}
  		String name = address.getHostAddress();
  		return (name != null && IP_PATTERN.matcher(name).matches() && !ANYHOST_VALUE.equals(name) && !LOCALHOST_VALUE
  				.equals(name));
  	}
  
  	/**
  	 *
  	 * @param address
  	 * @return 返回IPV6的地址
  	 */
  	private static InetAddress normalizeV6Address(Inet6Address address) {
  		String addr = address.getHostAddress();
  		int i = addr.lastIndexOf('%');
  		if (i > 0) {
  			try {
  				return InetAddress.getByName(addr.substring(0, i) + '%' + address.getScopeId());
  			} catch (UnknownHostException e) {
  				logger.debug("Unknown IPV6 address: ", e);
  			}
  		}
  		return address;
  	}
  
  	/**
  	 *
  	 * @return 返回本地的IP
  	 */
  	private static InetAddress getLocalAddress0() {
  		InetAddress localAddress = null;
  		try {
  			localAddress = InetAddress.getLocalHost();
  			InetAddress addressItem = toValidAddress(localAddress);
  			if (addressItem != null) {
  				return addressItem;
  			}
  		} catch (Throwable e) {
  			logger.error(e.getMessage(), e);
  		}
  
  		try {
  			Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
  			if (null == interfaces) {
  				return localAddress;
  			}
  			while (interfaces.hasMoreElements()) {
  				try {
  					NetworkInterface network = interfaces.nextElement();
  					if (network.isLoopback() || network.isVirtual() || !network.isUp()) {
  						continue;
  					}
  					Enumeration<InetAddress> addresses = network.getInetAddresses();
  					while (addresses.hasMoreElements()) {
  						try {
  							InetAddress addressItem = toValidAddress(addresses.nextElement());
  							if (addressItem != null) {
  								try {
  									if (addressItem.isReachable(100)) {
  										return addressItem;
  									}
  								} catch (IOException e) {
  									// ignore
  								}
  							}
  						} catch (Throwable e) {
  							logger.error(e.getMessage(), e);
  						}
  					}
  				} catch (Throwable e) {
  					logger.error(e.getMessage(), e);
  				}
  			}
  		} catch (Throwable e) {
  			logger.error(e.getMessage(), e);
  		}
  		return localAddress;
  	}
  
  
  	/**
  	 *
  	 * @return 返回本地的IP
  	 */
  	public static InetAddress getLocalAddress() {
  		if (LOCAL_ADDRESS != null) {
  			return LOCAL_ADDRESS;
  		}
  		InetAddress localAddress = getLocalAddress0();
  		LOCAL_ADDRESS = localAddress;
  		return localAddress;
  	}
  
  	/**
  	 *
  	 * @return 返回本地的IP
  	 */
  	public static String getIp() {
  		return getLocalAddress().getHostAddress();
  	}
  
  	/**
  	 *
  	 * @param port
  	 * @return 返回本地IP:port
  	 */
  	public static String getIpPort(int port) {
  		String ip = getIp();
  		return getIpPort(ip, port);
  	}
  
  	/**
  	 *
  	 * @param ip
  	 * @param port
  	 * @return ip:port
  	 */
  	public static String getIpPort(String ip, int port) {
  		if (ip == null) {
  			return null;
  		}
  		return ip.concat(":").concat(String.valueOf(port));
  	}
  
  	/**
  	 * @param address
  	 * @return ip和port的数组
  	 */
  	public static Object[] parseIpPort(String address) {
  		String[] array = address.split(":");
  
  		String host = array[0];
  		int port = Integer.parseInt(array[1]);
  
  		return new Object[]{host, port};
  	}
  }
  