surabhiag
asked on
<%! %> doubt in jsp
If we are declaring the variable and methods than where it goes. Where it is stored in the back end?
Thanks
surabhi
Thanks
surabhi
ASKER
<%!
int count=0;
public void sample()
{
System.out.println("Sample
}
%>
if we are delaring in the <% %> tag than code goes to _jspService method. If we are declaring than wher it goes that i want ot know.
int count=0;
public void sample()
{
System.out.println("Sample
}
%>
if we are delaring in the <% %> tag than code goes to _jspService method. If we are declaring than wher it goes that i want ot know.
You're going to have to be a little more helpful with this question: What are you talking about? Do you mean, when declaring a variable/method inside of a <%!...%> tag, where does it get embedded in the code? Well, in that case:
Background: All JSP's get compiled to servlets, where all the non-JSP HTML is sent via the HttpServletResponse.getWri
BEFORE:
** foobar.jsp **
<html>
<head>
<title>Foo</title>
</head>
<body>
<b>Bar</b>
</body>
</html>
AFTER:
public class foobar extends HttpServlet
{
doGet( HttpServletRequest req, HttpServletResponse res )
{
PrintWriter out = res.getWriter();
out.println( "<html>" );
out.println( "<head>" );
out.println( "<title>Foo</title>" );
out.println( </head>" );
out.println( <body>" );
out.println( "<b>Bar</b>" );
out.println( "</body>" );
out.println( "</html>" );
}
}
So, the way the declaration tag in JSP's work:
BEFORE:
<html>
<head>
<title>Foo</title>
</head>
<%! int new_integer = 0; %>
<body>
<b>Bar</b>
</body>
</html>
AFTER:
public class foobar extends HttpServlet
{
int new_integer = 0;
doGet( HttpServletRequest req, HttpServletResponse res )
{
PrintWriter out = res.getWriter();
out.println( "<html>" );
out.println( "<head>" );
out.println( "<title>Foo</title>" );
out.println( </head>" );
out.println( <body>" );
out.println( "<b>Bar</b>" );
out.println( "</body>" );
out.println( "</html>" );
}
}
The same principle applies to to methods. They're declared with class scope, so they're visible to everything in the servlet, (or JSP, as the case may be.)
Background: All JSP's get compiled to servlets, where all the non-JSP HTML is sent via the HttpServletResponse.getWri
BEFORE:
** foobar.jsp **
<html>
<head>
<title>Foo</title>
</head>
<body>
<b>Bar</b>
</body>
</html>
AFTER:
public class foobar extends HttpServlet
{
doGet( HttpServletRequest req, HttpServletResponse res )
{
PrintWriter out = res.getWriter();
out.println( "<html>" );
out.println( "<head>" );
out.println( "<title>Foo</title>" );
out.println( </head>" );
out.println( <body>" );
out.println( "<b>Bar</b>" );
out.println( "</body>" );
out.println( "</html>" );
}
}
So, the way the declaration tag in JSP's work:
BEFORE:
<html>
<head>
<title>Foo</title>
</head>
<%! int new_integer = 0; %>
<body>
<b>Bar</b>
</body>
</html>
AFTER:
public class foobar extends HttpServlet
{
int new_integer = 0;
doGet( HttpServletRequest req, HttpServletResponse res )
{
PrintWriter out = res.getWriter();
out.println( "<html>" );
out.println( "<head>" );
out.println( "<title>Foo</title>" );
out.println( </head>" );
out.println( <body>" );
out.println( "<b>Bar</b>" );
out.println( "</body>" );
out.println( "</html>" );
}
}
The same principle applies to to methods. They're declared with class scope, so they're visible to everything in the servlet, (or JSP, as the case may be.)
ASKER
When the _jspService() method comes into the picture?.
We also have _jspInit() and _jspDestroy() method.
thanks
We also have _jspInit() and _jspDestroy() method.
thanks
ASKER
When the _jspService() method comes into the picture?.
We also have _jspInit() and _jspDestroy() method.
thanks
We also have _jspInit() and _jspDestroy() method.
thanks
ASKER
When the _jspService() method comes into the picture?.
We also have _jspInit() and _jspDestroy() method.
thanks
We also have _jspInit() and _jspDestroy() method.
thanks
Where is the question here? I see question marks, but no actual question.
ASKER CERTIFIED SOLUTION
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ASKER
Thank you very much "SuperKarateMonkey".
Now i got it what happens in the back end.
Thank you
Now i got it what happens in the back end.
Thank you
That's actually short for "SuperKarateMonkeyDeathCar
Don't forget to close the question by accepting an answer.
Don't forget to close the question by accepting an answer.
ffs...why does it matter?
It works...deal with it....accept SDM's comment, and lets get over this nonsense ;-)
hee hee
I'm gonna post a Q about why adding doubles works, and where EXACTLY in memory all the code is stored...
Tx
It works...deal with it....accept SDM's comment, and lets get over this nonsense ;-)
hee hee
I'm gonna post a Q about why adding doubles works, and where EXACTLY in memory all the code is stored...
Tx
surabhiag:
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EXPERTS:
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This old question needs to be finalized -- accept an answer, split points, or get a refund. For information on your options, please click here-> http:/help/closing.jsp#1
EXPERTS:
Post your closing recommendations! No comment means you don't care.
No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:
Accept SuperKarateMonkey's comment as answer
Please leave any comments here within the next seven days.
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
jimmack
EE Cleanup Volunteer
I will leave a recommendation in the Cleanup topic area that this question is:
Accept SuperKarateMonkey's comment as answer
Please leave any comments here within the next seven days.
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
jimmack
EE Cleanup Volunteer
Some example code might help...
If you mean what I think you mean, session variables and beans are stored in memory by the container
Maybe you'd get more help on the JSP pages?
https://www.experts-exchange.com/Web/Web_Languages/JSP/