java 获取IP和MAC

// 获取ip地址
	public static String getIpAddress() {
		try {
			Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();
			InetAddress ip = null;
			while (allNetInterfaces.hasMoreElements()) {
				NetworkInterface netInterface = (NetworkInterface)allNetInterfaces.nextElement();
				if (netInterface.isLoopback() || netInterface.isVirtual() || !netInterface.isUp()) {
					continue;
				} else {
					Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
					while (addresses.hasMoreElements()) {
						ip = addresses.nextElement();
						if (ip != null && ip instanceof Inet4Address) {
							return ip.getHostAddress();
						}
					}
				}
			}
		} catch (Exception e) {
			System.out.println("获取IP失败！！！！");
		}
		return "";
	}
	
	// 获取mac地址
	public static String getMacAddress() {
		try {
			Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();
			byte[] mac = null;
			while (allNetInterfaces.hasMoreElements()) {
				NetworkInterface netInterface = (NetworkInterface)allNetInterfaces.nextElement();
				if (netInterface.isLoopback() || netInterface.isVirtual() || !netInterface.isUp()) {
					continue;
				} else {
					mac = netInterface.getHardwareAddress();
					if (mac != null) {
						StringBuilder sb = new StringBuilder();
						for (int i = 0; i < mac.length; i++) {
							sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));
						}
						if (sb.length() > 0) {
							return sb.toString();
						}
					}
				}
			}
		} catch (Exception e) {
			System.out.println(("MAC地址获取失败"));
		}
		return "";
	}