/**	 * 用来获取手机拨号上网（包括CTWAP和CTNET）时由PDSN分配给手机终端的源IP地址。	 * 	 * @return	 * @author SHANHY	 */	public static String getPsdnIp() {		try {			for (Enumeration
    
      en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {				NetworkInterface intf = en.nextElement();				for (Enumeration
     
       enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {					InetAddress inetAddress = enumIpAddr.nextElement();					if (!inetAddress.isLoopbackAddress()) {						return inetAddress.getHostAddress().toString();					}				}			}		} catch (Exception e) {		}		return "";	}