linux java获取配置文件路径 java获取linux本机ip

public String getUnixLocalIp() {
            String ip = "";
            try {
                Enumeration<?> e1 = (Enumeration<?>) NetworkInterface.getNetworkInterfaces();
                while (e1.hasMoreElements()) {
                    NetworkInterface ni = (NetworkInterface) e1.nextElement();
                    if (!ni.getName().equals("eth0")) {
                        continue;
                    } else {
                        Enumeration<?> e2 = ni.getInetAddresses();
                        while (e2.hasMoreElements()) {
                            InetAddress ia = (InetAddress) e2.nextElement();
                            if (ia instanceof Inet6Address)
                                continue;
                            ip = ia.getHostAddress();
                        }
                        break;
                    }
                }
            } catch (SocketException e) {
                e.printStackTrace();
                System.exit(-1);
            }
            return ip;
    }