InetAddress Ŭ·¡½º´Â Internet Protocol(IP) address¸¦ Ç¥ÇöÇϱâ À§ÇÑ Å¬·¡½ºÀÔ´Ï´Ù. ¸ÕÀú ÀÌ Å¬·¡½ºÀÇ ÁÖ¿ä ¸Þ¼µå¸¦ »ìÆìº¸µµ·Ï ÇÏÁÒ.
n public String getHostAddress()
n public static InetAddress getLocalHost()
n public static InetAddress getByName(String host)
n public static InetAddress [] getAllByName(String host)
n public byte [] getAddress() µîµî..
´ëÃæ º¸´Ï IP¿Í Domain Name¿¡ °ü·ÃµÈ ¸Þ¼µåµéÀÔ´Ï´Ù. Ŭ·¡½º¶ó´Â ´À³¦Àº ¿©·¯ °¡ÁöÀÇ ´À³¦À¸·Î »ý°¢ÇØ º¼ ¼ö ÀÖ½À´Ï´Ù. °¡·É, StringŬ·¡½º´Â ¸îÀÚÀÇ ±ÛÀ» ³Ö¾îÁÖ¸é ±× ±Û·Î ¹º°¡¸¦ ÇÒ ¼ö ÀÖ´Â ¸Þ¼µåµéÀ» Á¦°øÇÕ´Ï´Ù. ÀÌ ¸»Àº ÀÌ·± °ÅÁÒ! ÇÙ½ÉÀº ±ÛÀÌ°í ´É·ÂÀº ¸Þ¼µåµé¿¡°Ô ÀÖ´Â °ÍÀÔ´Ï´Ù. ´Ù½Ã ¸»ÇÏ¸é ¸â¹öÇʵå·Î »ç¿ëÇÒ ¼ö ÀÖ´Â °ÍÀº ±Û ÀÚüÀÌ¸ç ±× ±ÛÀ» ¾î¶»°Ô ÇÏ·Á´Â °ÍÀº ¸Þ¼µå¿¡ ÇØ´çÇÑ´Ù´Â ¸»ÀÔ´Ï´Ù. ÀÌ¿Í °°Àº ¸Æ¶ô¿¡¼ º»´Ù¸é Host NameÀ» ³Ö¾î ÁÖ¸é ±×°ÍÀ¸·Î ¹º°¡¸¦ ÇÒ ¼ö ÀÖ´Â ¸Þ¼µå¸¦ Á¦°øÇϴ Ŭ·¡½º°¡ ¹Ù·Î InetAddressŬ·¡½ºÀÔ´Ï´Ù.
¸¸¾à, ¿©·¯ºÐÀÌ À̰ÍÀ» Á÷Á¢ ¸¸µç´Ù°í °¡Á¤ÇØ º¸½Ê½Ã¿À. º¹ÀâÇÑ ³×Æ®¿÷ÀÇ Áö½Ä°ú Á¤º¸¸¦ ¾Ë°í ÀÖ¾î¾ß Çϸç, ½ÉÁö¾î´Â Çϵå¿þ¾î±îÁö ¾Ë¾Æ¾ß µÇ´Â »óȲÀÌ ¹ß»ýÇÒ ¼öµµ ÀÖ½À´Ï´Ù. ÀÌ·¯ÇÑ Ãø¸éÀ» º¸¿ÏÇϰڴٴ ¾ð¾î°¡ C++¾ð¾îÀ̰í, ÀÌ C++ÀÇ º¹À⼺À» ´Ü¼øÈ½ÃŰ°í ¸¹Àº ¶óÀ̺귯¸®¿Í Àç»ç¿ë¼ºÀ» Á¦°øÇÏ´Â ¾ð¾î°¡ ¹Ù·Î ÀÚ¹Ù¾ð¾î ¾Æ´Ï°Ú½À´Ï±î?
Çٽɿ¡¼ ¸¹ÀÌ ¹þ¾î³µ±º¿ä. ¿©ÇÏÆ°, InetAddressŬ·¡½º´Â Host NameÀÚü¸¦ ÇÚµéÇϰí Address¿¡ °ü·ÃµÇ¾î ÀÖ´Â ±â´ÉÀ» ºÎ¿©ÇÑ Å¬·¡½ºÀÔ´Ï´Ù. ±×·³ InetAddressŬ·¡½ºÀÇ °´Ã¼¸¦ »ý¼ºÇÏ°í »ç¿ëÇÏ´Â ±âº»ÀûÀÎ ¹æ¹ýÀ» ´ÙÀ½ ¿¹¿¡¼ ¾Ë¾Æº¸ÁÒ.
InetAddressTest.java(InetAddress ÀÌ¿ë¹æ¹ýÀ» À§ÇÑ ¿¹Á¦) |
import java.net.*; public class InetAddressTest{ public static void main(String[] args) { InetAddress myIp = null; try { myIp = InetAddress.getByName("www.jabook.org"); System.out.println("getHostName : " + myIp.getHostName()); System.out.println("getHostAddress : " + myIp.getHostAddress()); System.out.println("toString : " + myIp.toString()); System.out.println("getLocalHost : " + myIp.getLocalHost()); }catch(UnknownHostException e) {System.out.println(e);} } } |
C:\JavaExample\16>javac InetAddressTest.java C:\JavaExample\16>java InetAddressTest getHostName : www.jabook.org getHostAddress : 203.252.134.117 toString : www.jabook.org/203.252.134.117 getLocalHost : ja/210.221.120.117 |
¸ÕÀú InetAddressÀÇ static ¸â¹ö¸Þ¼µåÀÎ getByName()¸Þ¼µå¸¦ ÀÌ¿ëÇÏ¿© InetAddress°´Ã¼¸¦ ¾ò¾î ³À´Ï´Ù. ÀÌ ¶§ ¸Å°³º¯¼ö´Â È£½ºÆ® À̸§À» »ç¿ëÇÕ´Ï´Ù.
n InetAddress myIp = InetAddress.getByName("www.jabook.org");
»ý¼ºµÈ InetAddressŬ·¡½ºÀÇ °´Ã¼ myIp¸¦ ÀÌ¿ëÇØ¼ ÇÒ ¼ö ÀÖ´Â ÀÛ¾÷Àº ¹°·Ð InetAddressÀÇ ¸â¹ö¸Þ¼µå¸¦ ÀÌ¿ëÇÏ´Â °ÍÀÔ´Ï´Ù. ±×·³ ¸â¹ö¸Þ¼µå¸¦ Çϳª¾¿ º¼±î¿ä.
n myIp.getHostName(): www.jabook.orgÀÇ È£½ºÆ®À̸§À» StringÀ¸·Î ¸®ÅÏ ÇÕ´Ï´Ù.
n myIp.getHostAddress(): www.jabook.orgÀÇ IP Address¸¦ StringÀ¸·Î ¸®ÅÏ ÇÕ´Ï´Ù.
n myIp.toString(): myIp ÀÚü¸¦ StringÀ¸·Î ¹ÝȯÇÕ´Ï´Ù.
n myIp.getLocalHost(): local hostÀÇ InetAddress¸¦ ¹ÝȯÇÕ´Ï´Ù.
InetAddressŬ·¡½ºÀÇ ÁÖ¿ä ¸â¹ö¸Þ¼µå |
public byte[] getAddress() : InetAddress °´Ã¼ÀÇ ¿ø·¡ÀÇ IP ÁÖ¼Ò¸¦ ¸®ÅÏ ÇÑ´Ù. °á°ú´Â ³×Æ®¿öÅ© ¹ÙÀÌÆ® ¼øÀÌ´Ù. ÁÖ¼ÒÀÇ ÃÖ»óÀ§ ¼ø¼ ¹ÙÀÌÆ®´Â getAddress()[0]¿¡ ÀÖ´Ù public static InetAddress getByName(String host) hrows UnknownHostException : È£½ºÆ® ¸íÀÌ ÁöÁ¤µÈ È£½ºÆ®ÀÇ IP ÁÖ¼Ò¸¦ °áÁ¤ÇÑ´Ù. È£½ºÆ® ¸íÀº "java.sun.com"°ú °°Àº ±â°è À̸§À̰ųª "206.26.48.100"°ú °°Àº IP ÁÖ¼Ò¸¦ ³ªÅ¸³»´Â ¹®ÀÚ¿ÀÏ ¼ö ÀÖ´Ù. public static InetAddress[] getAllByName(String host) throws UnknownHostException : È£½ºÆ® ¸íÀÌ ÁöÁ¤µÈ È£½ºÆ®ÀÇ ¸ðµç IP ÁÖ¼Ò¸¦ °áÁ¤ÇÑ´Ù. public String getHostAddress() : IP ÁÖ¼Ò ¹®ÀÚ¿ "%d.%d.%d.%d"À¸·Î ¸®ÅÏ ÇÑ´Ù. public String getHostName() : ÁÖ¼Ò¿¡ ´ëÇÑ ¿ÏÀüÇÑ È£½ºÆ® ¸íÀ» ¸®ÅÏ ÇÑ´Ù. public static InetAddress getLocalHost() throws UnknownHostException : LocalHost¸¦ ¸®ÅÏ ÇÑ´Ù. public String toString() : IP ÁÖ¼Ò¸¦ StringÀ¸·Î º¯È¯ ÇÑ´Ù. |
ÀÌ¿Í °°ÀÌ InetAddressŬ·¡½º´Â È£½ºÆ®À̸§°ú IP Address¿¡ °ü·ÃµÈ ÀÛ¾÷À» ´ëÇà ÇØÁִ Ŭ·¡½ºÀÔ´Ï´Ù. °á·ÐÀûÀ¸·Î, ÀÌ Å¬·¡½º´Â 4°³ÀÇ ¼ö¸¦ Á¶ÇÕÇÏ¿© ÇϳªÀÇ ÁÖ¼Ò·Î ¸¸µé±â À§ÇÑ ÀÛ¾÷À» µµ¿ï ¼ö ÀÖ°Ô µµ¿ÍÁִ Ŭ·¡½ºÀÔ´Ï´Ù. ¸¸¾à ÀÌ Å¬·¡½º°¡ ¾ø´Ù°í °¡Á¤ÇÑ´Ù¸é ¿ì¸®´Â ¡°211.222.232.12¡±¶ó´Â IP Address¸¦ ÇϳªÇϳª ParsingÇÏ¿©¾ß ÇÕ´Ï´Ù. ¶Ç ÀÌ°É Domain NameÀ¸·Î ¹Ù²Ù·Á°í ÇÑ´Ù¸é º¸´Ù ³À̵µ ÀÖ´Â ³×Æ®¿öÅ©ÀÇ ±â¹ýÀ» »ç¿ëÇÏ¿©¾ß ÇÒ °ÍÀÔ´Ï´Ù.
¢Ñ InetAddress Ŭ·¡½º |
Internet Protocol(IP) Address¸¦ Ç¥ÇöÇϱâ À§ÇÑ Å¬·¡½º·Î IP AddressÀÇ Á¤º¸³ª Domain NameÀÇ Á¤º¸¸¦ ÃßÃâÇÒ ¼ö ÀÖ´Ù. |
jabookÀúÀÚ¸íÇÔ |
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