java获取IP地址：

public class IPDemo {

public static void main(String [] args) throws UnknownHostException{

//获取本地主机

InetAddress localHost = InetAddress.getLocalHost();

System.out.println(localHost);//Lenovo-sxg/192.168.1.106

//获取本地主机的IP地址

String ipaddress = localHost.getHostAddress();

System.out.println(ipaddress);

//获取本地主机的主机名

String name = localHost.getHostName();

System.out.println(name);

//在给定主机名的情况下确定主机的 IP地址

InetAddress inetAddress = InetAddress.getByName("192.168.1.106");

System.out.println(inetAddress.getHostName()+inetAddress.getHostAddress());

//在给定主机名的情况下，根据系统上配置的名称服务返回其 IP 地址所组成的数组。

InetAddress[] allByName = InetAddress.getAllByName("www.baidu.com");

for (int i = 0; i < allByName.length; i++) {

System.out.println(allByName[i]);

}

}

 }