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// sessionÀ» ÀÌ¿ëÇÑ Ä«¿îÅÍ
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class SessionCounter extends HttpServlet
{
static final String Counter_key ="Counter.count";

public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException,IOException
{
  // Ŭ¶óÀÌ¾ðÆ®·Î ºÎÅÍ ¼¼¼ÇÀ» °¡Áö°í ¿À´Âµ¥.
  // true À϶§¸¸ ¼¼¼ÇÀÇ °´Ã¼¸¦ ¹ÝȯÇÕ´Ï´Ù.
  HttpSession session = req.getSession(true);

  res.setContentType("text/html");

  PrintWriter pout = new PrintWriter(
   new OutputStreamWriter(
    res.getOutputStream(),"KSC5601"
   )
  );

  int count =1;
  Integer i =(Integer) session.getAttribute(Counter_key);

  //¸¸¾à ±× Àü¿¡ Ä«¿îÅͰ¡ ÀÖ´Ù¸é ±× °ªÀ» ´õÇØÁÝ´Ï´Ù.
  if( i != null)
  {
   count=i.intValue()+1;
  }//if ¹® ´Ý±â

  // Äí۰ü·Ã ½ÃÀÛ!!
  // »ç¿ëÀÚ¿¡°Ô ÀúÀåµÈ Äí۸¦ ¸ùâ °¡Á®¿Â´Ù. ±×¸®°í ÀúÀåµÈ ½Ã°£µµ °¡Á®¿Â´ç..
  Cookie cookies[] = req.getCookies();
  Cookie cookie = null;
  long cookieDate = 0L;
  if(cookies != null)
  {
   cookie = cookies[0];
   cookieDate = Long.parseLong(cookie.getValue());
  }
  else
  {
   Cookie coo = new Cookie("TodayCheck", new String(""+System.currentTimeMillis()));
   coo.setMaxAge(60*60*24);
   res.addCookie(coo);
  }

  long nowTime = System.currentTimeMillis() - cookieDate;
  if(nowTime > 60*60*24*1000)
  {
   // ¿©±â Á¶±Ý ÀÌ»óÇÔ.. MilliSecond ¸¦ Áشٰí ÇØ¼­
   // 1000À» °öÇØÁÖ±â´Â Çߴµ¥ Á¤È®ÇÑÁö´Â ¸ð¸£°ÚÀ½.
   // API º¸°í ¼öÁ¤¿ä¸Á..
   System.out.println("ÇÏ·ç°¡ Áö³µ½À´Ï´Ù. Ä«¿îÆ®¸¦ Áõ°¡ÇÕ´Ï´Ù.");
   //»õ¼Ç¾È¿¡ ¹ÝȯµÈ Ä«¿îÅÍÀÇ °ªÀ» Ãß°¡ÇÕ´Ï´Ù.
   session.setAttribute(Counter_key, new Integer(count));
  }
  else
  {
   System.out.println("ÇÏ·ç°¡ ¾ÈÁö³µ½À´Ï´Ù. ´ç½ÅÀ» Áõ°¡´ë»ó¿¡¼­ Á¦¿ÜÇÕ´Ï´Ù~~(°³±×Äܼ­Æ®¹öÁ¯)");
  }
  // Cookie Ŭ·¡½º °ü·Ã ³¡... ½ÇÇàÇϽðí Äí۰¡ »ý¼ºµÇ¾ú´ÂÁö Cookie µð·ºÅ丮¿¡¼­ È®Àοä¸Á..

  pout.println("<html>");
  pout.println("<head>");
  pout.println("<title> ¼¼¼ÇÀ¸·Î ¸¸µç Ä«¿îÅÍ</title>");
  pout.println("</head>");
  pout.println("<body>");
  pout.println("´ç½ÅÀÇ ¼¼¼Ç¾ÆÀ̵ð´Â <b>"+session.getId()+"</b>");
  pout.println("ÀÌ¸ç ´ç½ÅÀÇ ¹æ¹®È½¼ö´Â <b>"+count+" ° ÀÔ´Ï´Ù.</b>");
  pout.println("<form method=GET action=""+req.getRequestURI()+"">");
  pout.println("<input type=submit value="´Ù½Ãº¸±â">");
  pout.println("</form>");
  pout.println("</body></html>");
  pout.flush();

}// doGet() ´Ý±â

}// SessionCounter´Ý±â
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