B컷전문 | 개발과 인생의 이야기

자바(JAVA)에서 아이피(IP) 주소 얻기

윈도우만이 대상이라면....

public static String getHostAddress() throws UnknownHostException { InetAddress inetAddress = InetAddress.getLocalHost(); String hostName = inetAddress.getHostName(); String hostAddress = inetAddress.getHostAddress(); if(log.isInfoEnabled()) { log.info("==============Host Information==============="); log.info("hostName: " + hostName); log.info("hostAddress: " + hostAddress); log.info("============================================="); } return hostAddress; }

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; }