linux系统自动获取ip地址

Posted 2023-04-14

参考技术A 配置文件设置dhcp即可 然后重启网卡服务就会获得IP 具体可以看看《linux就该这么学》

自动获取windows或者linux系统IP

 

1.获取Windows下的IP
java.net.InetAddress.getLocalHost().getHostAddress();

2.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;
    }
3.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;
    }
4.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();
        }
    }
5.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