InetAddress

InetAddress测试： 解决ip地址问题。

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


public class Test {
    public static void main(String[] args) throws UnknownHostException {
        /**
         * InetAddress没有封装端口
         */
        //使用getLocalHost方法创建InetAddress对象
        InetAddress address = InetAddress.getLocalHost();
        System.out.println(address.getHostAddress());//返回本机的ip地址
        System.out.println(address.getHostName());//输出本机计算机名
        //根据域名得到InetAddress对象
        address = InetAddress.getByName("www.163.com");
        System.out.println(address.getHostAddress());//输出163服务器的ip：125.39.21.3
        System.out.println(address.getHostName());//输出域名：www.163.com
        //根据ip得到InetAddress对象
        address = InetAddress.getByName("125.39.21.3");
        System.out.println(address.getHostAddress());//输出163服务器的ip：125.39.21.3
        System.out.println(address.getHostName());//如果ip被解析（DNS）则输出域名，如果没被解析则输出ip。
    }
}