¼Ò¼³°°ÀºÀÚ¹Ù3ºÎ  15Àå ¾ÖÇø´  15.6 À¥ºê¶ó¿ìÁ® Çڵ頠

 

15.6 À¥ ºê¶ó¿ìÁ® ÇÚµé

 

À¥¿¡¼­ µ¿ÀÛÇÏ´Â ÇÁ·Î±×·¥Àº »ó´çÈ÷ À§ÇèÇÑ ´ë»óÀÔ´Ï´Ù. ¾ÖÇø´Àº À¥¿¡¼­ µ¿ÀûÀ¸·Î ´Ù¿î·Îµå µÇ¾î Ŭ¶óÀÌ¾ðÆ®¿¡¼­ ½ÇÇàµÇ±â ¶§¹®ÀÔ´Ï´Ù. À̰ÍÀº ´Ù¸¥ »ç¶÷ÀÌ ¸¸µç ÇÁ·Î±×·¥À» ÀÚ½ÅÀÇ ÄÄÇ»ÅÍ¿¡ µ¿ÀÛÇϵµ·Ï Çã¶ôÇÏ´Â °ÍÀÔ´Ï´Ù. º°³­ »ç¶÷ÀÌ ¾ÖÇø´À» Ư¼öÇÑ ¸ñÀûÀ¸·Î »ç¿ëÇÑ´Ù¸é ¾î¶»°Ô µÉ±î¿ä? Ŭ¶óÀ̾ðÆ®ÀÇ Á¤º¸¸¦ ºÐ¼®ÇÏ°í ±×¸®°í ±×°ÍÀ» »©°£´Ù¸é À̰ÍÀº ÇØÅ·¿¡ ÇØ´çÇÕ´Ï´Ù. ±×·¡¼­ ¾ÖÇø´ÀÇ º¸¾È¹®Á¦´Â Ç×»ó À̽´°¡ µË´Ï´Ù.

 

ÀÌ·¯ÇÑ ¹®Á¦ ¶§¹®¿¡ ¾ÖÇø´¿¡¼­´Â SandBox¶ó´Â °³³äÀ» µµÀÔÇÏ°Ô µË´Ï´Ù. SandBox³»¿¡ Ư¼öÇÑ ¸í·ÉÀ» »ç¿ëÇÏÁö ¸øÇϵµ·Ï ¿øÃÊÀûÀ¸·Î ¸·¾Æ¹ö¸®´Â ¹æ¹ýÀ» ÀÌ¿ëÇÕ´Ï´Ù. ±×·¡¼­ ClientÀÇ ÇÁ·Î±×·¥À» ¾ÖÇø´ÀÌ ½ÇÇàÇϰųª Ŭ¶óÀ̾ðÆ®ÀÇ Çϵåµð½ºÅ©¿¡ ÀÐ°í ±â·ÏÇÏ´Â °Í ±×¸®°í ¾ÖÇø´ÀÌ ÀÚ½ÅÀÌ ¸ö´ã°í ÀÖ´Â ÄÄÇ»ÅÍÀ̿ܿ¡ ´Ù¸¥ ÄÄÇ»ÅÍ¿Í Åë½ÅÀ» ÇÏ´Â °Í°ú °°ÀÌ ¾à°£ ÀÇ½ÉµÈ´Ù°í »ý°¢µÇ´Â °ÍÀº ÀüºÎ ¸·¾Æ¹ö¸³´Ï´Ù. SandBox¾È¿¡¼­¸¸ ¾ÖÇø´ÀÌ ÀÛµ¿Çϵµ·Ï ÇÏ´Â °ÍÀÌÁö¿ä. ¸¸¾à À̸¦ ¾î±æ½Ã ¾î±è¾øÀÌ Security¿¡·¯¸¦ ¹ß»ýÇÏ°Ô µË´Ï´Ù. ±×·¸´Ù°í, ¾Æ¿¹ »ç¿ëÇÒ ¼ö ¾ø´Â °ÍÀº ¾Æ´Õ´Ï´Ù. ¸¸¾à º¸¾È¿¡ À§¹èµÇ´Â ÀÛ¾÷À» ÇÏ°í ½Í´Ù¸é »ç¿ëÀÚ¿¡°Ô ÀÎÁõÀ» ÅëÇØ¼­ ¹Ýµå½Ã ¾Ë¸®µµ·Ï Çϰí ÀÖ½À´Ï´Ù.

 

º¸¾ÈÀ» À§¹èÇÏÁö ¾Ê´Â ¹üÀ§³»¿¡¼­ ¾ÖÇø´Àº À¥ºê¶ó¿ìÁ®¸¦ ÇÚµéÇÒ ¼ö ÀÖ´Â ±ÇÇÑÀ» ¾òÀ» ¼ö ÀÖ½À´Ï´Ù. À¥ºê¶ó¿ìÁ®¸¦ Á¦¾îÇÒ ¼ö ÀÖ´Â ÇÚµéÀ» ¾ÖÇø´¿¡¼­´Â AppletContext¶ó´Â Ŭ·¡½º¸¦ µÎ¾î ÇØ°áÇϰí ÀÖ½À´Ï´Ù. ¾ÖÇø´ÄÁÅØ½ºÆ®·Î ÇÒ ¼ö ÀÖ´Â ÀÏÀº ´ÙÀ½°ú °°½À´Ï´Ù.

 

AppletContextÀÇ ÁÖ¿ä ¸Þ¼ÒµåµéÀ» º¸¸é¡¦.

n         public Applet getApplet(String name)

n         public Enumeration getApplets()

n         public void showDocument(URL url)

n         public void showDocument(URL url, String target)

n         public void showStatus(String status)

n         AudioClip getAudioClip(URL url)

n         Image getImage(URL url) 

 

AppletContext´Â ÀÎÅÍÆäÀ̽ºÀ̱⠶§¹®¿¡ ÇöÀç ·ÎµùµÇ¾îÁø ¾ÖÇø´À» ÅëÇØ¼­¸¸ ¾ò¾î ³¾ ¼ö  ÀÖ½À´Ï´Ù. Àüü ¸Þ¼­µå¸¦ ÀüºÎ ³ª¿­Çصµ ¸î °³ µÇÁöµµ ¾Ê½À´Ï´Ù. ÇöÀç À¥ºê¶ó¿ìÁ®¿¡¼­ »ç¿ëµÇ´Â AppletµéÀ» ¾ò¾î³»´Â getApplet°ú À¥ºê¶ó¿ìÁ®ÀÇ »õâÀ» ¶ç¿ì´Â showDocument¸Þ¼­µå ±×¸®°í, »óÅÂÁÙ¿¡ »óÅÂÇ¥½Ã¸¦ ÇÏ´Â showStatus¸Þ¼­µå°¡ °íÀÛÀÔ´Ï´Ù. Ãß°¡ÀûÀ¸·Î Image¿Í AudioClipÀ» ¾òÀ» ¼ö ÀÖ´Â ¸Þ¼­µå¸¦ Æ÷ÇÔÇϰí ÀÖ½À´Ï´Ù.

 

URLTest.java(¾ÖÇø´¿¡¼­ URLº¯°æÇϱâ)

import java.awt.event.*;

import java.awt.*;

import java.applet.Applet;

import java.applet.AppletContext;

import java.net.URL;

import java.net.MalformedURLException;

public class URLTest extends Applet implements ActionListener{

   private Button urlButton=null;      

   private Button statusButton=null;      

   public void init(){

       this.setLayout(new FlowLayout());

       this.urlButton = new Button("URLTest");          

       this.statusButton = new Button("»óÅÂÇ¥½Ã");          

       this.add(urlButton);  

       this.add(statusButton);    

       this.urlButton.addActionListener(this);      

       this.statusButton.addActionListener(this);      

   } 

   public void actionPerformed(ActionEvent e) {           

       Object obj = e.getSource();

       AppletContext ac = getAppletContext();                      

       if(obj == urlButton) {         

          try{                    

             ac.showDocument(new URL(getDocumentBase(),"http://www.jabook.org"));

          }catch(MalformedURLException e1){}

       } else if(obj == statusButton){

             ac.showStatus("¾È³çÇϼ¼¿ä");     

       }

   }

}

URLTest.html

<html><head><title>URLTest</title></head>

<body>

<applet code="URLTest.class" width=200 height=140></applet>

</body></html>

C:\JavaExample\15>javac URLTest.java

 

 

AppletContext¸¦ ¾ò±â À§Çؼ­ ¾ÖÇø´³»¿¡¼­ ´ÙÀ½°ú °°Àº ¸Þ¼­µå¸¦ È£ÃâÇϰí ÀÖ½À´Ï´Ù.

 

n        AppletContext ac = getAppletContext();

 

±×¸®°í AppletContext°´Ã¼ ac¸¦ ÅëÇØ¼­ showDocument¸Þ¼­µå¿Í showStatus¸Þ¼­µå¸¦  ´ÙÀ½°ú °°ÀÌ È£ÃâÇϰí ÀÖ½À´Ï´Ù.

 

n        ac.showDocument(new URL(getDocumentBase(),"http://www.jabook.org"));

n        ac.showStatus("¾È³çÇϼ¼¿ä");

 

ÇÁ·Î±×·¥À» ½ÇÇà½ÃŰ¸é  À§ÀÇ °á°ú±×¸²°ú °°ÀÌ ¾ÖÇø´ÀÌ ³ªÅ¸³³´Ï´Ù. ±×¸®°í URLTest¹öưÀ» ´©¸£½Ã¸é À¥ ºê¶ó¿ìÁ®°¡ ¸ñÇ¥ÇÑ URL ÁÖ¼ÒÀÇ »çÀÌÆ®¸¦ ¿ÀÇÂÇÕ´Ï´Ù. ±×¸®°í »óÅÂÇ¥½Ã¹öưÀ» ´©¸£½Ã¸é »óÅ ǥ½Ãâ¿¡ ¡°¾È³çÇϼ¼¿ä¡±¶ó´Â ¸Þ½ÃÁö°¡ º¸ÀÏ °ÍÀÔ´Ï´Ù. À̰ÍÀÌ ¹Ù·Î ApplectContextÀÇ ´É·ÂÀÔ´Ï´Ù.



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