java中通过网卡名称获取IP地址

package me.xuzs.sso.test;

import java.net.inetaddress;
import java.net.networkinterface;
import java.net.socketexception;
import java.util.enumeration;

public class internettest {

    public static void main(string[] args) {
        string netcard = "lo";
        try {
            enumeration<networkinterface> netinterfaces = networkinterface
                    .getnetworkinterfaces();
            if (netinterfaces.hasmoreelements()) {
                networkinterface netinterface = netinterfaces.nextelement();
                if (netcard.equals(netinterface.getname())) {
                    // 子接口，linux下会取到父接口？？
                    enumeration<networkinterface> subnetinterfaces = netinterface
                            .getsubinterfaces();
                    while (subnetinterfaces.hasmoreelements()) {
                        networkinterface subnetinterface = subnetinterfaces
                                .nextelement();
                        system.out.println(subnetinterface.getname());
                        enumeration<inetaddress> subaddresses = netinterface
                                .getinetaddresses();
                        while (subaddresses.hasmoreelements()) {
                            inetaddress subaddress = subaddresses.nextelement();
                            system.out.println(subaddress.gethostaddress());
                        }
                    }
                    // 打印接口下所有ip
                    system.out.println(netinterface.getname());
                    enumeration<inetaddress> addresses = netinterface
                            .getinetaddresses();
                    while (addresses.hasmoreelements()) {
                        inetaddress address = addresses.nextelement();
                        system.out.println(address.gethostaddress());
                    }
                }
            }
        } catch (socketexception e) {
            e.printstacktrace();
        }
    }
}