获取本地 ip (多网卡的情况下)

public String getLocalHostName() {
        String hostName;
        try {
            InetAddress addr = InetAddress.getLocalHost();
            hostName = addr.getHostAddress();
        } catch (Exception ex) {
            hostName = "";
        }
        return hostName;
    }

public String[] getAllLocalHostIP() {
    String[] ret = null;
    try {
        String hostName = getLocalHostName();
        if (hostName.length() > 0) {
            InetAddress[] addrs = InetAddress.getAllByName(hostName);
            if (addrs.length > 0) {
                ret = new String[addrs.length];
                for (int i = 0; i < addrs.length; i++) {
                    ret[i] = addrs[i].getHostAddress();
                }
            }
        }

        } catch (Exception ex) {
            ret = null;
        }
        return ret;
    }

评论

1 楼 zhiweiv 2009-04-07  

你这个好像有问题，在Windows 7下使用获取全部ip的时候会返回一个网卡的ipv4地址还有link local ipv6地址，尽管没有设定它。同时，在我的电脑上在连上internet的时候还会获得Tunnel adapter Teredo Tunneling Pseudo-Interface的两个ipv6地址。isSiteLocalAddress()方法对于真实的ipv4地址会返回true，而其他的地址都会返回false

        String hostName=System.getenv("USERDOMAIN");
        InetAddress[] group = InetAddress.getAllByName(hostName);
        for (InetAddress add : group) {
            System.out.println(add.getHostAddress()+"  "+add.isSiteLocalAddress());
        }

下面就是我的输出内容
10.76.35.11  true
192.168.1.3  true
fe80:0:0:0:d1eb:8a57:f679:85d7%12  false
fe80:0:0:0:e8fc:122:5ef:f350%22  false
fe80:0:0:0:1c77:a2cf:c4d1:3e0d%16  false
2001:0:cf2e:3096:1c77:a2cf:c4d1:3e0d  false