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 }