怎样获取IP地址

 public String getLocalIpAddress(){
    try {
for(Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();en.hasMoreElements();){
NetworkInterface intf = en.nextElement();
for(Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses();enumIpAddr.hasMoreElements();){
InetAddress inetAddress = enumIpAddr.nextElement();
if(!inetAddress.isLoopbackAddress()){
return inetAddress.getHostAddress().toString();
}
}
}
} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
    }