InetAddress

InetAddress測試： 解決ip地址問題。

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


public class Test {
    public static void main(String[] args) throws UnknownHostException {
        /**
         * InetAddress沒有封裝端口
         */
        //使用getLocalHost方法創(chuàng)建InetAddress對象
        InetAddress address = InetAddress.getLocalHost();
        System.out.println(address.getHostAddress());//返回本機的ip地址
        System.out.println(address.getHostName());//輸出本機計算機名
        //根據(jù)域名得到InetAddress對象
        address = InetAddress.getByName("www.163.com");
        System.out.println(address.getHostAddress());//輸出163服務(wù)器的ip：125.39.21.3
        System.out.println(address.getHostName());//輸出域名：www.163.com
        //根據(jù)ip得到InetAddress對象
        address = InetAddress.getByName("125.39.21.3");
        System.out.println(address.getHostAddress());//輸出163服務(wù)器的ip：125.39.21.3
        System.out.println(address.getHostName());//如果ip被解析（DNS）則輸出域名，如果沒被解析則輸出ip。
    }
}