자바(JAVA)에서 아이피(IP) 주소 얻기

B컷개발자 2015. 3. 20. 15:42

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윈도우만이 대상이라면....

윈도우, 리눅스, 맥 등을 고려해야한다면...

public static String getHostAddress() throws SocketException {
		Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
		while(networkInterfaces.hasMoreElements()) {
			NetworkInterface networkInterface = networkInterfaces.nextElement();
			String name = networkInterface.getName();
			String displayName = networkInterface.getDisplayName();			
			boolean isLoopback = networkInterface.isLoopback();
			boolean isVirtual = networkInterface.isVirtual();
			if(!isLoopback) {
				Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
				while(inetAddresses.hasMoreElements()) {
					InetAddress inetAddress = inetAddresses.nextElement();
					if(!inetAddress.isLoopbackAddress() && !inetAddress.isLinkLocalAddress() && !inetAddress.isSiteLocalAddress()) {
						String hostName = inetAddress.getHostName();
						String hostAddress = inetAddress.getHostAddress();
						if(log.isInfoEnabled()) {
							log.info("==============Host Information===============");
							log.info("NetworkInterface Name: " + name);
							log.info("NetworkInterface Display Name: " + displayName);
							log.info("NetworkInterface Loopback: " + isLoopback);
							log.info("NetworkInterface Virtual: " + isVirtual);
							log.info("Host Name: " + hostName);
							log.info("Host Address: " + hostAddress);
							log.info("=============================================");
						}
						return hostAddress;
					}					
				}
			}
		}
		return null;
	}

좀더 유연하게 쓰려고 한다면 네트워크 인터페이스 정보를 얻는 부분과 어드레스 정보를 얻는 부분을 나누는게 좋을듯하다.

public static InetAddress getInetAddress() throws SocketException {
		Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
		while(networkInterfaces.hasMoreElements()) {
			NetworkInterface networkInterface = networkInterfaces.nextElement();
			String name = networkInterface.getName();
			String displayName = networkInterface.getDisplayName();			
			boolean isLoopback = networkInterface.isLoopback();
			boolean isVirtual = networkInterface.isVirtual();
			if(!isLoopback) {
				Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
				while(inetAddresses.hasMoreElements()) {
					InetAddress inetAddress = inetAddresses.nextElement();
					if(!inetAddress.isLoopbackAddress() && !inetAddress.isLinkLocalAddress() && !inetAddress.isSiteLocalAddress()) {
						if(log.isInfoEnabled()) {
							log.info("==============NetworkInterface Information===============");
							log.info("Name: " + name);
							log.info("Display Name: " + displayName);
							log.info("Loopback: " + isLoopback);
							log.info("Virtual: " + isVirtual);
							log.info("=============================================");
						}
						return inetAddress;
					}					
				}
			}
		}
		return null;
	}
	
	public static String getHostAddress() throws SocketException {
		InetAddress inetAddress = getInetAddress();
		String hostName = inetAddress.getHostName();
		String hostAddress = inetAddress.getHostAddress();
		if(log.isInfoEnabled()) {
			log.info("==============Host Address Information===============");
			log.info("Host Name: " + hostName);
			log.info("Host Address: " + hostAddress);
			log.info("=============================================");
		}
		return hostAddress;
	}

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