JDK之IP

try {
			Enumeration<NetworkInterface> ips = NetworkInterface.getNetworkInterfaces();
			InetAddress local = InetAddress.getByName("PC-201001191418");
			
			while(ips.hasMoreElements()){
				NetworkInterface  ip = ips.nextElement();
				Enumeration<InetAddress>  ipaddr = ip.getInetAddresses();
				while(ipaddr.hasMoreElements()){
					InetAddress tmp = ipaddr.nextElement();
					String str = tmp.getHostName();
					String tmpip = tmp.getHostAddress();
					System.out.println("HOST:" +str+"\tIP:" + tmpip +"\t"+"Local:"+local.getHostAddress());
				}
			}
		} catch (SocketException e) {
			e.printStackTrace();
		} catch (UnknownHostException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

NetworkInterface.getNetworkInterfaces()
返回此机器上的所有接口。如果在此机器上找不到任何网络接口，则返回 null。