Java中如何获取当前服务器的IP地址

获取ip的第一反应就是：使用InetAddress这个类：方法如下

InetAddress.getLocalHost().getHostAddress();

public static void main(String[] args) {
        try {
            //用 getLocalHost() 方法创建的InetAddress的对象
            InetAddress address = InetAddress.getLocalHost();
            System.out.println(address.getHostName());//主机名
            System.out.println(address.getCanonicalHostName());//主机别名
            System.out.println(address.getHostAddress());//获取IP地址
            System.out.println("===============");
            //用域名创建 InetAddress对象
            InetAddress address1 = InetAddress.getByName("www.wodexiangce.cn");
            //获取的是该网站的ip地址，如果我们所有的请求都通过nginx的，所以这里获取到的其实是nginx服务器的IP地址
            System.out.println(address1.getHostName());//www.wodexiangce.cn
            System.out.println(address1.getCanonicalHostName());//124.237.121.122
            System.out.println(address1.getHostAddress());//124.237.121.122
            System.out.println("===============");
            //用IP地址创建InetAddress对象
            InetAddress address2 = InetAddress.getByName("220.181.111.188");
            System.out.println(address2.getHostName());//220.181.111.188
            System.out.println(address2.getCanonicalHostName());//220.181.111.188
            System.out.println(address2.getHostAddress());//220.181.111.188
            System.out.println("===============");
            //根据主机名返回其可能的所有InetAddress对象
            InetAddress[] addresses = InetAddress.getAllByName("www.baidu.com");
            for (InetAddress addr : addresses) {
                System.out.println(addr);
                //www.baidu.com/220.181.111.188
                //www.baidu.com/220.181.112.244
            }
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }

可以知道此时获取到的服务器如果加了代理方式就是获取到代理的地址，一般会使用netty代理转发。

　/**
      * 获取服务器IP地址
      * @return
      */
     @SuppressWarnings("unchecked")
     public static String  getServerIp(){
         String SERVER_IP = null;
         try {
             Enumeration netInterfaces = NetworkInterface.getNetworkInterfaces();
             InetAddress ip = null;
             while (netInterfaces.hasMoreElements()) {
                 NetworkInterface ni = (NetworkInterface) netInterfaces.nextElement();
                 ip = (InetAddress) ni.getInetAddresses().nextElement();
                 SERVER_IP = ip.getHostAddress();
                 if (!ip.isSiteLocalAddress() && !ip.isLoopbackAddress()
                         && ip.getHostAddress().indexOf(":") == -1) {
                     SERVER_IP = ip.getHostAddress();
                     break;
                 } else {
                     ip = null;
                 }
             }
         } catch (SocketException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
         return SERVER_IP;
     }

我的解决死方法（方法是死的，但是能解决问题^_^）

在nacos的配置里面新建一个

constant.ipHost=服务器的ip

//获取服务器的ip
@Value("${constant.ipHost}")
private String ipHost;

总结