JAVA种抓取IP地址

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;

public class IPAddrFetcher {
 public static String getIPInfo() {
  String trueIp = null;
  try {
   Enumeration interfaces = NetworkInterface
     .getNetworkInterfaces();
   while (interfaces.hasMoreElements()) {
    NetworkInterface ni = interfaces.nextElement();
    Enumeration inetAddresses = ni.getInetAddresses();
    while (inetAddresses.hasMoreElements()) {
     InetAddress address = inetAddresses.nextElement();
     if (address instanceof Inet4Address) {
      if (!address.getHostAddress().equals("127.0.0.1"))
       trueIp = address.getHostAddress();
     }

    }
   }
  } catch (Exception ex) {
   ex.printStackTrace();
  }
  return trueIp;
 }

}