java socket 获取端口 java socket获取本地ip

package getlocalip;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.*;

public class GetLocalIpUtil {

    private static Set<String> machineIps = Collections.synchronizedSet(new HashSet<String>());

    public static Set<String> get() {
        if (!machineIps.isEmpty()) {
            return machineIps;
        }
        try {
            InetAddress[] addresses = getAllLocalUsingNetworkInterface();
            if (addresses == null || addresses.length == 0) {
                System.out.println("定时器本机可用的ip地址失败,getAllLocalUsingNetworkInterface返回0个地址");
                return machineIps;
            }
            for (InetAddress address : addresses) {
                if (!address.getHostAddress().toString().equals("127.0.0.1")) {
                    machineIps.add(address.getHostAddress().toString());
                }
            }
            System.out.println("定时器本机可用的ip地址成功,ip地址：" + machineIps.toString());
        } catch (UnknownHostException e) {
            System.out.println("获取定时器物理IP失败!message={}" + e.getMessage());
        }
        return machineIps;
    }

    private static InetAddress[] getAllLocalUsingNetworkInterface() throws UnknownHostException {
        List<Object> addresses = new ArrayList<Object>();
        Enumeration<NetworkInterface> e = null;
        try {
            e = NetworkInterface.getNetworkInterfaces();
        } catch (SocketException ex) {
            throw new UnknownHostException("127.0.0.1");
        }
        while (e.hasMoreElements()) {
            NetworkInterface ni = (NetworkInterface) e.nextElement();
            for (Enumeration<InetAddress> e2 = ni.getInetAddresses(); e2.hasMoreElements();) {
                addresses.add(e2.nextElement());
            }
        }
        InetAddress[] iAddresses = new InetAddress[addresses.size()];
        for (int i = 0; i < iAddresses.length; i++) {
            iAddresses[i] = (InetAddress) addresses.get(i);
        }
        return iAddresses;
    }
}