用 InetAddress 类的 InetAddress.getByName() 方法来获取指定主机（网址）的IP地址

完整代码

import java.net.InetAddress;
import java.net.UnknownHostException;public class GetIP {public static void main(String[] args) {InetAddress address = null;try {address = InetAddress.getByName("www.baidu.com");}catch (UnknownHostException e) {System.exit(2);}System.out.println(address.getHostName() + "=" + address.getHostAddress());System.exit(0);}
}

结果输出

www.baidu.com=39.156.66.14