java取ip

网上看到的取IP的方法，觉的挺好。还想再linux、window下都管用

private static String getLocalSiteIP() throws Exception {
		String siteString = "";
		Enumeration netInterfaces = NetworkInterface.getNetworkInterfaces();
		while (netInterfaces.hasMoreElements()) {
			NetworkInterface ni = (NetworkInterface) netInterfaces.nextElement();
			InetAddress ip = (InetAddress) ni.getInetAddresses().nextElement();
			if (ip.isSiteLocalAddress() && !ip.isLoopbackAddress() &&
				ip.getHostAddress().indexOf(":") == -1) {
				System.out.println("Interface " + ni.getName() +
				" seems to be InternetInterface. I'll take it...");
				siteString = ip.getHostAddress();
			}
		}
		return siteString;
	}