java 获取Linux，ip地址和网关

获取Linux操作系统的IP地址和网关可以通过使用命令行工具来实现，以下是获取IP地址和网关的命令：

1. 获取IP地址：

ifconfig

该命令可以列出网络接口信息，其中包括IP地址以及其他网络相关的信息。

2. 获取网关：

route -n

该命令可以列出当前系统的路由表信息，其中包括网关的IP地址以及其他网络相关的信息。

如果你是使用Java程序来获取IP地址和网关的话，可以通过使用NetworkInterface和InetAddress类来实现，以下是示例代码：

获取IP地址：

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;

public class GetIPAddress {
    public static void main(String[] args) throws Exception {
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface iface = interfaces.nextElement();
            if (iface.isLoopback() || !iface.isUp()) {
                continue;
            }

            Enumeration<InetAddress> addresses = iface.getInetAddresses();
            while (addresses.hasMoreElements()) {
                InetAddress addr = addresses.nextElement();
                if (addr.isLinkLocalAddress() || addr.isLoopbackAddress() || addr.isMulticastAddress()) {
                    continue;
                }
                System.out.println("IP地址：" + addr.getHostAddress());
            }
        }
    }
}

获取网关：

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

public class GetGateway {
    public static void main(String[] args) throws SocketException {
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface iface = interfaces.nextElement();
            Enumeration<InetAddress> inetAddresses = iface.getInetAddresses();
            while (inetAddresses.hasMoreElements()) {
                InetAddress inetAddress = inetAddresses.nextElement();
                if (!inetAddress.isLinkLocalAddress() && !inetAddress.isLoopbackAddress()
                        && inetAddress instanceof java.net.Inet4Address) {
                    Enumeration<NetworkInterface> subInterfaces = iface.getSubInterfaces();
                    while (subInterfaces.hasMoreElements()) {
                        NetworkInterface subInterface = subInterfaces.nextElement();
                        Enumeration<InetAddress> subInetAddresses = subInterface.getInetAddresses();
                        while (subInetAddresses.hasMoreElements()) {
                            InetAddress subInetAddress = subInetAddresses.nextElement();
                            if (!subInetAddress.isLinkLocalAddress() && !subInetAddress.isLoopbackAddress()
                                    && subInetAddress instanceof java.net.Inet4Address) {
                                System.out.println("网关地址：" + subInetAddress.getHostAddress());
                            }
                        }
                    }
                }
            }
        }
    }
}