由于项目是部署在集群上的,需要项目能够自动采集各机器的信息。java.net.InetAddress.getLocalHost()来获取本地机器的IP和机器名信息,但发现在linux下并不能获取到机器的实际IP和机器名信息(获取到的是localhost/127.0.0.1)。

方案描述

根据系统类型(linux、windows)来通过不同的方式获取本地机器的IP信息。

获取Windows下的IP

java.net.InetAddress.getLocalHost().getHostAddress();

获取linux下的IP

	/**
	 * 获取Linux下的IP地址
	 *
	 * @return IP地址
	 * @throws SocketException
	 */
	private static String getLinuxLocalIp() throws SocketException {
		String ip = "";
		try {
			for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
				NetworkInterface intf = en.nextElement();
				String name = intf.getName();
				if (!name.contains("docker") && !name.contains("lo")) {
					for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
						InetAddress inetAddress = enumIpAddr.nextElement();
						if (!inetAddress.isLoopbackAddress()) {
							String ipaddress = inetAddress.getHostAddress().toString();
							if (!ipaddress.contains("::") && !ipaddress.contains("0:0:")
									&& !ipaddress.contains("fe80")) {
								ip = ipaddress;
							}
						}
					}
				}
			}
		} catch (SocketException ex) {
			ip = "127.0.0.1";
			ex.printStackTrace();
		}
		return ip;
	}

判断操作系统的类型

	/**
	 * 判断操作系统是否是Windows
	 *
	 * @return
	 */
	public static boolean isWindowsOS() {
		boolean isWindowsOS = false;
		// 注:这里的system,系统指的是 JRE (runtime)system,不是指 OS
		String osName = System.getProperty("os.name");
		if (osName.toLowerCase().indexOf("windows") > -1) {
			isWindowsOS = true;
		}
		return isWindowsOS;
	}

这里关于System.getProperty("os.name")说明一下(参考自http://blog.csdn.net/brotherdong90/article/details/49073941)

key 注释
file.separator File separator (e.g., "/")
java.class.path Java classpath
java.class.version Java class version number
java.home Java installation directory
java.vendor Java vendor-specific string
java.vendor.url Java vendor URL
java.version Java version number
line.separator Line separator
os.arch Operating system architecture
os.name Operating system name
path.separator Path separator (e.g., "????
user.dir User's current working directory
user.home User home directory
user.name User account name

最后将上面三个方法进行整合

	/**
	 * 获取本地IP地址
	 *
	 * @throws SocketException
	 */
	public static String getLocalIP() throws UnknownHostException, SocketException {
		if (isWindowsOS()) {
			return InetAddress.getLocalHost().getHostAddress();
		} else {
			return getLinuxLocalIp();
		}
	}

参考

https://www.cnblogs.com/raphael5200/p/5996464.html

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