Java 获取本机 ip 地址 /ipv6 地址，非用户请求返回的 IP

        try {String hostAddress = InetAddress.getLocalHost().getHostAddress();
            System.out.println("hostAddress:" + hostAddress);
            String hostName = InetAddress.getLocalHost().getHostName();
            System.out.println("hostName:" + hostName);
            if (hostName.length() > 0) {InetAddress[] addrs = InetAddress.getAllByName(hostName);
                if (addrs.length > 0) {for (int i = 0; i < addrs.length; i++) {InetAddress address = addrs[i];
                        System.out.println("**********************");
                        System.out.println(address.getHostAddress());
                        if (address instanceof Inet6Address) {System.out.println("true6");
                        } else if(address instanceof Inet4Address){System.out.println("true4");
                        } else {System.out.println("unknown");
                        }
                        System.out.println("**********************");
                    }
                }
            }
        } catch (UnknownHostException e) {e.printStackTrace();
        }

或者

        Enumeration<NetworkInterface> interfs = NetworkInterface.getNetworkInterfaces();
        while (interfs.hasMoreElements()) {NetworkInterface interf = interfs.nextElement();
            Enumeration<InetAddress> addres = interf.getInetAddresses();
            while (addres.hasMoreElements()) {InetAddress in = addres.nextElement();
                if (in instanceof Inet4Address) {System.out.println("v4:" + in.getHostAddress());
                } else if (in instanceof Inet6Address) {System.out.println("v6:" + in.getHostAddress());
                }
            }
        }

参考：https://blog.csdn.net/scugxl/article/details/47816117