JimmyÀÇ È¨ÆäÀÌÁö > Java > JSP °­ÁÂ7(Session »ç¿ë½Ã ÁÖÀÇ»çÇ×)

       

<%@ page language="java" import="lesson.*" %>
<%-- jsp7.jsp
  session ¼³Á¤Çϱâ
--%>
<html>
<body>
<h2>  session ¼³Á¤ </h2>
<%
  //HttpSession session = request.getSession(true);
  String js = (String)session.getValue(session.getId());
  if(js == null) {
        js = new String("test");
        session.putValue(session.getId(), js);
  }else{
    out.println("sessionÀÌ ÀÌ¹Ì ¼³Á¤µÇ¾îÀÖ½À´Ï´Ù<br>");
  }
%>
<a href=jsp6_2.jsp>session Àбâ </a>
</body>
</html>
-----------------------------------------------------
°á°ú:
error¹ß»ý
java.lang.ClassCastException

-----------------------------------------------------
¼³¸í:

session»ç¿ë½Ã ÁÖÀÇÇØÁ¡Àº ´ÙÀ½°ú °°½À´Ï´Ù.

jsp6_1.jsp¿¡¼­ 
 session.putValue(session.getId(), js);
 js´Â °´Ã¼Å¸ÀÔÀÌ jsp6Àε¥ 
 
jsp7.jsp¿¡¼­ 
 String js = (String)session.getValue(session.getId());
 js°ªÀ» StringÀ¸·Î ¹Þ±â ¶§¹®¿¡ 
 java.lang.ClassCastException ¿¡·¯°¡ ¹ß»ýÇÕ´Ï´Ù.

°á·Ð: session¿¡¼­´Â ÇѰ¡Áö °´Ã¼Å¸ÀÔÀ¸·Î¸¸ µ¥ÀÌŸ¸¦ Àü¼ÛÇØ¾ßÇÑ´Ù.


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