Java gets the IP addresses of all network cards on this machine (ipv4)

/**
* 获取机器所有网卡的IP（ipv4）
* @return
*/
public static List<String> getLocalIP() {
List<String> ipList = new ArrayList<String>();
InetAddress ip = null;
try {
Enumeration<NetworkInterface> netInterfaces = (Enumeration<NetworkInterface>) NetworkInterface.getNetworkInterfaces();
while (netInterfaces.hasMoreElements()) {
NetworkInterface ni = (NetworkInterface) netInterfaces.nextElement();
// 遍历所有ip
Enumeration<InetAddress> ips = ni.getInetAddresses();
while (ips.hasMoreElements()) {
ip = (InetAddress) ips.nextElement();
if (null == ip || "".equals(ip)) {
continue;
}
String sIP = ip.getHostAddress();
if(sIP == null || sIP.indexOf(":") > -1) {
continue;
}
ipList.add(sIP);
System.out.println(sIP);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return ipList;
}