Hi,
I have a question about session. Here is my test page.
Actually, page1.jsp = page2.jsp, page3.jsp = page4.jsp and page5.jsp =
page6.jsp.
My problem is, when I click submit in page3 or page4, i get a null session
id. But
I click submit in page5 or page6, I get the same session id with page1 or
page2.
Why?? Is it after a change to mainframe2, the session will lost?
Please help me to get the session in page3 or page4.
Thanks.
Louis
(The first mail got some problem, hope this main can read)
----------------------------------------------------------------------------
-------------------------
File Name : TestController.java Servlet
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
public class TestController extends HttpServlet {
public static String ERRORPAGE = "error.jsp" ;
public static String JSPDIR = "/jsp/" ;
public void init(ServletConfig config) throws ServletException {
super.init(config);
}
public void service(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
String next;
String cmd = null;
try {
cmd = req.getParameter("cmd");
HttpSession s = req.getSession(true) ;
req.setAttribute("sid",s.getId()) ;
next = cmd+".jsp";
}
catch (Exception e) {
req.setAttribute("javax.servlet.jsp.jspException", e);
next = ERRORPAGE;
}
RequestDispatcher rd;
rd = getServletContext().getRequestDispatcher(JSPDIR + next);
rd.forward(req, res);
}
}
----------------------------------------------------------------------------
-------------------------
File Name : mainframe1.jsp
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<frameset rows="*" cols="200,*" frameborder="NO" border="0"
framespacing="0">
<frame name="page1" noresize scrolling="NO" src="page1.jsp">
<frame name="page2" src="page2.jsp" marginwidth="0" marginheight="0">
</frameset><noframes></noframes>
<body bgcolor="#FFFFFF">
</body>
</html>
----------------------------------------------------------------------------
-------------------------
File Name : page1.jsp
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#FFFFFF">
<form name="form1" method="post" action="TestController">
<input type="submit" name="Submit" value="Submit">
<input type="hidden" name="cmd" value ="page3">
<p> </p>
<p> </p>
<p>Session Id: <%=request.getAttribute("sid")%> </p>
</form>
</body>
</html>
----------------------------------------------------------------------------
-------------------------
File Name : page2.jsp
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#FFFFFF">
<form name="form1" method="post" action="TestController">
<input type="submit" name="Submit" value="Submit">
<input type="hidden" name="cmd" value ="page4">
<p> </p>
<p> </p>
<p>Session Id: <%=request.getAttribute("sid")%> </p>
</form>
</body>
</html>
----------------------------------------------------------------------------
-------------------------
File Name : page3.jsp
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#FFFFFF">
<form name="form1" method="post" action="TestController" target="_top">
<input type="submit" name="Submit" value="Submit">
<input type="hidden" name="cmd" value ="mainFrame2">
<p> </p>
<p> </p>
<p>Session Id: <%=request.getAttribute("sid")%> </p>
</form>
</body>
</html>
----------------------------------------------------------------------------
-------------------------
File Name : page4.jsp
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#FFFFFF">
<form name="form1" method="post" action="TestController" target="_top">
<input type="submit" name="Submit" value="Submit">
<input type="hidden" name="cmd" value ="mainFrame2">
<p> </p>
<p> </p>
<p>Session Id: <%=request.getAttribute("sid")%> </p>
</form>
</body>
</html>
----------------------------------------------------------------------------
-------------------------
File Name : mainframe2.jsp
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<frameset rows="*" cols="200,*" frameborder="NO" border="0"
framespacing="0">
<frame name="page5" noresize scrolling="NO" src="page5.jsp">
<frame name="page6" src="page6.jsp" marginwidth="0" marginheight="0">
</frameset><noframes></noframes>
<body bgcolor="#FFFFFF">
</body>
</html>
----------------------------------------------------------------------------
-------------------------
File Name : page5.jsp
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#FFFFFF">
<form name="form1" method="post" action="TestController">
<input type="hidden" name="cmd" value ="result">
<input type="submit" name="Submit" value="Submit">
<p> </p>
<p> </p>
<p>Session Id: <%=request.getAttribute("sid")%> </p>
</form>
</body>
</html>
----------------------------------------------------------------------------
-------------------------
File Name : page6.jsp
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#FFFFFF">
<form name="form1" method="post" action="TestController">
<input type="hidden" name="cmd" value ="result">
<input type="submit" name="Submit" value="Submit">
<p> </p>
<p> </p>
<p>Session Id: <%=request.getAttribute("sid")%> </p>
</form>
</body>
</html>
----------------------------------------------------------------------------
-------------------------
File Name : result.jsp
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#FFFFFF">
<p> </p>
<p> </p>
<p>Session Id: <%=request.getAttribute("sid")%> </p>
</body>
</html>
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