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<body>
 <%
   Cookie[] cookies = request.getCookies() ;
   Cookie cookie = null ;
   if(cookies!=null){
     cookie = cookies[0] ;
     out.print("ÉϴηÃÎʵÄipÊÇ£º " + request.getRemoteAddr() +"<br>") ;  //µÃµ½¿Í»§¶ËµÄip
     out.print("ÉϴηÃÎÊʱ¼ä£º" + cookie.getValue()) ;
     cookie.setValue(new java.util.Date().toString()) ;
     response.addCookie(cookie) ;         //±£´æµ½¿Í»§¶Ë
     cookie.setMaxAge(365 * 24 * 3600);
   }
  
  
   if(cookies==null){
     cookie = new Cookie("AccessTime","") ;
     cookie.setValue(new java.util.Date().toString()) ;
     response.addCookie(cookie) ;    //±£´æµ½¿Í»§¶Ë
     cookie.setMaxAge(365 * 24 * 3600);
   }
  %>
  </body>
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        v512_servlet+jsp
01 ÔÚÐÞ¸ÄÍêCookieºó,Ò»¶¨Òª¼ÓÉÏresponse.addCookie(c);
   CookieÖÐÖ»Äܱ£´æ×Öĸ»òÊý×ÖÐÅÏ¢;
02 req.getSession()Óëreq.getSession(boolean create)
   ÎÞ²ÎÊýµÄ == ÓвÎÊýµÄ²ÎÊýÎ ......

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