ip地址

package edu.wtbu;

import java.net.InetAddress;
import java.net.UnknownHostException;

//测试ip
public class Demo01 {
    public static void main(String[] args) {
        try {
            //查询本机地址
            InetAddress inetAddress1 = InetAddress.getByName("127.0.0.1");
            System.out.println(inetAddress1);
            InetAddress inetAddress3 = InetAddress.getByName("localhost");
            System.out.println(inetAddress3);
            InetAddress inetAddress4 = InetAddress.getLocalHost();
            System.out.println(inetAddress4);

            //查询网站ip地址
            InetAddress inetAddress2 = InetAddress.getByName("www.baidu.com");
            System.out.println(inetAddress2);

            //常用方法
            //System.out.println(inetAddress2.getAddress());获得一组地址，一般不用
            System.out.println(inetAddress2.getCanonicalHostName());//获得规范名
            System.out.println(inetAddress2.getHostAddress());//获得主机ip地址
            System.out.println(inetAddress2.getHostName());//获得主机名
        } catch (UnknownHostException e) {
            throw new RuntimeException(e);
        }
    }
}