java获取hostIp和hostName

InetAddress的构造函数不是公开的(public),所以需要通过它提供的静态方法来获取,有以下的方法:


static InetAddress[] getAllByName(String host)
static InetAddress getByAddress(byte[] addr)
static InetAddress getByAddress(String host,byte[] addr)
static InetAddress getByName(String host)
static InetAddress getLocalHost()

 

java获取本地ip信息时getLocalHost(),匹配C:\Windows\System32\drivers\hosts中的数据,如果是windows系统可以直接调用getLocalHost()获得。但是如果是多个网口取值的数据未知。

但是linux系统则会找到localhost.localdomain:127.0.0.1

 

所以想获得真正的ip4地址,需要从网口的地址进行筛选

 1     public static InetAddress getInetAddress() throws SocketException{
 2         Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();
 3         InetAddress ipHost = null;
 4         while (allNetInterfaces.hasMoreElements()) {
 5             NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
 6             Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
 7             while (addresses.hasMoreElements()) {
 8                 ipHost = (InetAddress) addresses.nextElement();
 9                 if (ipHost != null && ipHost instanceof Inet4Address) {
10                     System.out.println("本机的HOSTIP = " + ipHost.getHostAddress());
11                     System.out.println("本机的HOSTNAME = " + ipHost.getHostName());
12                     return ipHost;
13                 }
14             }
15         }
16         return ipHost;
17     }

 

问题来了:

如果主机有多个ipv4地址该如何处理?

 

posted @ 2017-05-17 14:23  葫芦一生  阅读(9523)  评论(0编辑  收藏  举报