자바로 Host 조회하기

자바로 서버 Host 조회 해보자 ..

package test;

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

public class DnsTest {
 public static void main(String[] args) {
 try {
 InetAddress inetAddress = InetAddress.getLocalHost();
 displayStuff("local host", inetAddress);
 System.out.print("--------------------------");
 inetAddress = InetAddress.getByName("www.google.com");
 displayStuff("www.google.com", inetAddress);
 System.out.print("--------------------------");
 InetAddress[] inetAddressArray = InetAddress
 .getAllByName("www.google.com");
 for (int i = 0; i < inetAddressArray.length; i++) {
 displayStuff("www.google.com #" + (i + 1), inetAddressArray[i]);
 }
 } catch (UnknownHostException e) {
 e.printStackTrace();
 }
 }

public static void displayStuff(String whichHost, InetAddress inetAddress) {
 System.out.println("--------------------------");
 System.out.println("Which Host:" + whichHost);
 System.out.println("Canonical Host Name:"
 + inetAddress.getCanonicalHostName());
 System.out.println("Host Name:" + inetAddress.getHostName());
 System.out.println("Host Address:" + inetAddress.getHostAddress());
 }
}