java.net.InetAddress.getLocalHost（）不是一种通用的功能，因为这个是得到系统网络配置文件的内容，例如*nix下面就是/etc/hosts的内容。如果要得到一种和OS无关的网卡配置内容，就要使用java.net.NetworkInterface.getNetworkInterface（）才能获得和java语言实现相关的localhost信息。
import java.net.*;
public class kg {
public static void main(String args[]){
try{
java.net.InetAddress ad=java.net.InetAddress.getLocalHost();
System.out.println(ad.getAddress());
System.out.println(ad.getCanonicalHostName());
System.out.println(ad.getHostName());
System.out.println(ad.isMulticastAddress());
System.out.println(ad.isLoopbackAddress());
/*Windows output
* [B@757aef
* localhost
* cpit-b524f2dfb2
* false
* true
*/
java.util.Enumeration<java.net.NetworkInterface> en=java.net.NetworkInterface.getNetworkInterfaces();
while(en.hasMoreElements()){
java.net.NetworkInterface ni=en.nextElement();
System.out.println("x:"+ni.getName());
System.out.println("y:"+ni.getDisplayName());
java.util.Enumeration<java.net.InetAddress> ads=ni.getInetAddresses();
while(ads.hasMoreElements()){
java.net.InetAddress ip=ads.nextElement();
if(!ip.isSiteLocalAddress() && !ip.isLoopbackAddress()
&& !(ip.getHostAddress().indexOf(":")==-1)){
System.out.println("_My ip is:"+ip.getHostAddress());
}//end if
}
}
/* Windows output
* x:lo
* y:MS TCP Loopback interface
* x:eth0
* y:Broadcom 440x 10/100 Integrated Controller
*/
}catch(java.net.UnknownHostException e){
/* Linux out all:
* [B@19821f
* localhost.localdomain
* localhost.localdomain
* false
* true
* x:lo
* y:lo
*/
}catch(java.net.SocketException e){
System.out.println("Socket exception");
}
}
}
责任编辑：小草
