java获取当前电脑ip4的地址

/**
* 获取本机Ip
* 
* 通过 获取系统所有的networkInterface网络接口 然后遍历 每个网络下的InterfaceAddress组。 获得符合
* <code>InetAddress instanceof Inet4Address</code> 条件的一个IpV4地址
* 
* @return
*/
@SuppressWarnings("rawtypes")
public String localIp() {
String ip = null;
Enumeration allNetInterfaces;
try {
allNetInterfaces = NetworkInterface.getNetworkInterfaces();
while (allNetInterfaces.hasMoreElements()) {
NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
List<InterfaceAddress> InterfaceAddress = netInterface.getInterfaceAddresses();
for (InterfaceAddress add : InterfaceAddress) {
InetAddress Ip = add.getAddress();
if (Ip != null && Ip instanceof Inet4Address) {
ip = Ip.getHostAddress();
}
}
}
} catch (SocketException e) {
// TODO Auto-generated catch block
// logger.warn("获取本机Ip失败:异常信息:"+e.getMessage());
}
return ip;
}