Beginner question: session in JSP

Hello,
I'm new in JSP. I'm trying to use session variable in JSP file as shown below and get error "cannot resolve symbol" at session line
<%
String name = request.getParameter( "username" );
session.setAttribute( "theName", name );
%>
<HTML>
<BODY>
Continue
</BODY>
</HTML>
Thanks for any help!

Hello,
It may be due to the fact that the CLASSPATH of your web server is not correctly set.
One must ensure that the servlet package plus the vendor implementation of this package is within it.
I hope it helps.

Similar Messages

Handling Session in jsp and bean scope

i have problems with handling session in jsp
I want to check on all jsp pages
first thing is session is null
i want to him to be redirected to first page
and he should not be able to go ahead
I tried
if(session ==null)
response.sendRedirect("Login.jsp");
but this does not seem to work
It is very crtical problem can any one answer
this asap
Also i wanted to know that
I have bean which in turn calls static methods of another class which holds all DomainTable(database tables which do not change frequently)
Information .
This is bean is being implemented by me
in seession scope in a jsp
Do u guys think it would be goo idea to change
scop of this bean as Application in jsp
if so what would be advantages for same
I would appericate if i could a quick reply on both
question
as i am time crunch
arsh

You will always get some value of session and your code wont work. At the end of your Login.jsp, you should create a sesssion and store attributes. Check for these attributes in session, rather than checking session==null.

Beginner question: Configure Tomcat for JAAS?

Hi,
This is a beginner question :-(. I'm trying to get JAAS to work on my Tomcat (6.0.12) installation. I used code from a Javaworld article (http://www.javaworld.com/javaworld/jw-09-2002/jw-0913-jaas.html)
Of course I had to configure my Tomcat to work together with JAAS. The document I used is: http://tomcat.apache.org/tomcat-6.0-doc/printer/realm-howto.html
According to the Tomcat doc I have to do the following steps before I can use JAAS to authenticate a user:
1. Develop your code. Place the compiled classes in Tomcat's classpath
2. Setup a login.config file for Java, and tell Tomcat where to find it (set JAVA_OPTS)
3. Configure the JAASRealm in your server.xml
1 Develop code: I use the following classes:
PassiveCallbackHandler.java
RdbmsCredential.java
RdbmsLoginModule.java
RdbmsPrincipal.java
These classes I put in the package rdbmsjaas.
In the %CATALINA_HOME%/webapps/Javaworld_Jaas/WEB-INF/lib directory I created the rdbmsjaas.jar file.
The jsp is called jaas.jsp, and is stored in %CATALINA_HOME%/webapps/Javaworld_Jaas
2. Setup login.config
In %CATALINA_HOME%\conf I saved the file Javaworld_all_that_Jaas.config, containing:
Example {
   RdbmsLoginModule required
   debug="true"
   url="jdbc:mysql://localhost/jaasdb?user=javauser&password=javadude"
   driver="com.mysql.jdbc.Driver";
};I created an XP Environment Variable JAVA_OPTS with the value <-DJAVA_OPTS=-Djava.security.auth.login.config==C:/Program Files/Apache Software Foundation/Tomcat 6.0/conf/JavaWorld_All_That_Jaas.config> (excluding < and >)
I used the fully qualified address, instead of $CATALINA_HOME/conf/JavaWorld_All_That_Jaas.config. I think XP balks when it sees $CATALINA_HOME).
3 Configure JAASRealm in server.xml
In %CATALINA_HOME%\conf\ I changed web.xml. I added the following lines:
      <Realm className="org.apache.catalina.realm.JAASRealm"
             appName="jaas"
             userClassName="rdbmsjaas.RdbmsPrincipal"
             debug="99"
       />If I run the jsp from http://localhost:8080/JavaWorld_Jaas/jaas.jsp, I can enter my username/password, but when I click the Submit button, I get:
Caught Exception: java.lang.SecurityException: Unable to locate a login configurationWhere did my configuration go wrong?
Abel

You will need a JSP/servlet engine such as Tomcat - Apache alone won't do it.
I haven't seen any tutorials on set-up but the Tomcat documentation includes info on how to link to Apache. There are also books you can buy - check out the online book stores such as Amazon.
There's also a lot of info on this forum.

Session in JSP page

Hi all,
i built a web application now i want to use session in JSP pages to remember some variable such as password and entered date because i need them in later pages and i also don't want to send them via HTML hidden field. I actually don't know how to use session. Can anyone please just tell me how to create a session and store a variable and also how to retrieve the data from the session.
Another thing is guys can anyone tell me please that say i am user and i selected some items from a HTML select list and i submitted that and logged off the system now when i login later again i want to see those choices selected by default , i know it might have been done by sessions can anyone please tell me.
THANKS VERY MUCH

This is the way u can set and retrieve values from session
<% session.setAttribute("key","value"); %>
<% String user=(String)session.getAttribute("user");
%>
regards
Shanu

How to Handle user Session in JSP

Help me,
How to handle user session in JSP.......

Prakash_Pune wrote:
tell me some Debugging tech. so i can overcome from my problem.....Do you use an IDE? Any IDE ships with a decent debugger where in you can just execute the code step by step, explore the current variable values and check what exactly is happening. For example Eclipse or IntelliJ. If you don´t use an IDE, then just place some System.out.println() or Logger.debug() statements at strategic locations printing the variables of relevance so that you can track in logs what exactly is happening.
or tell any other way to find is my page is thread safe or not...Just write correct code and narrow the scope of the variables as much as possible. If you for example assigned the user object to a static variable or as a servlet´s instance variable, then exactly the same user object would be used everywhere in the application. That kind of logical things.

How to clear session in JSP?

I searched yahoo, and found that it seemed not easy to force invalid the session using jsp, compared to php just three lines:
session_start();
session_unset();
session_destroy();
How to acheive this using JSP? Must I follow these (quite complex) steps like this one?
http://sdc.sun.co.jp/javasystem/technote/cluster/jsp.html
Any simplier method?
Thx.

Not at all, it's very simple.
<%
session.removeAttribute("attributeName");
%>
This HttpSession API document shows all methods that can be called on the session object : http://java.sun.com/javaee/5/docs/api/javax/servlet/http/HttpSession.html

What is the use of session in jsp

hai,
what is the use of session in jsp. i cant understand from books. give some practical approach
thanks

give some practical approachYou sound like a supervisor ordering for a cup of coffee.
I DONT TAKE ORDERS !!
IMAO
Which book did you refer ? Did you google ?

Want to get ApEx session in JSP

Hi Pals,
From my ApEx application, I am calling a JSP by providing a direct URL.
THe JSP does some specific function here.
If the user get the JSP url by right click and view source, they can very well use this outside my ApEx application.
I want to apply security like, the JSP url only works inside my ApEx application.
My thought, if I can share ApEx session with JSP session I can impose the security check in JSP level.
Any idea would be appreciable.

Hi,
Im using below method to call jsp page and passing UserName, application id and Session as
<iframe src="http://apex.oracle.com/pls/otn/...javaapplication.jsp?userId=&USER.&appId=&APP_ID.&sessId=&SESSION."></iframe>
Vailidation is done against the table "wwv_flow_sessions$" of schema : flows_030100 ,whether those values are exist in table.
But if user is already logged into apex application, he can run the jsp independantly taking the url from "view source".
Im also looking for more solid validation
Regards,
Benz

Making a session in jsp.

I want ti make a session in jsp.
suppose if any budy can login through login page which is
www.harshworld.info/login.jsp
they will just direct open that page
www.harshworld.info/wallpage.jsp
then this page will not open . & user will see The login page it self.
So after making session in jsp what can i do ?
& how to Do can one help me.
PL Thanks for Giving time to me

THk dear
there's always a session...
if(session.getAttribute("username") == null) {
response.sendRedirect("login.jsp");
return;
and put the attribute in the session on successful
login..
Or look up other security modes.

Maintain session in JSP frame

Hi,
I am having trouble in maintaining session in jsp frames. -
Here is sample code
parent.jsp
<HTML>
<HEAD>
<LINK rel=stylesheet type="text/css" href="defaults.css">
<TITLE>abc</TITLE>
<%
     String checkAmount = "100.00";
     session.setAttribute("checkAmount", checkAmount);
     System.out.println("checkAmount in ppmain"+session.getAttribute("checkAmount"));
%>
<FRAMESET rows="235,*" frameborder="no" >
<FRAME NAME="pptop" SRC="top.jsp" frameborder=0 scrolling=no noresize >
<FRAME NAME="ppbottom" SRC="bottom.jsp" frameborder=0 scrolling=no marginwidth=0 marginheight=0 noresize>
</FRAMESET>
</HTML>
top.jsp -
<HTML>
<HEAD>
<LINK rel=stylesheet type="text/css" href="defaults.css">
<TITLE>top</TITLE>
<%
System.out.println("session in top "+session);
System.out.println("checkAmount in top "+session.getAttribute("checkAmount"));
%>
</HTML>
It is not able to retain session in the top.jsp ( in SOP for session I get different session ID in parent.jsp and top.jsp
This Works well in local but when gets deployed to WAS6 server troubles starts.
Any help is appreciated.
Thanks

When you create URLs, you might want to try using JSTL to rewrite them:
<FRAME NAME="pptop"
       SRC="<c:url value='top.jsp'/>"
       frameborder=0
       scrolling=no
       noresize >
<FRAME NAME="ppbottom"
       SRC="<c:url value='bottom.jsp'/>"
       frameborder=0
       scrolling=no
       marginwidth=0
       marginheight=0
       noresize>Or you can use:
SRC='<%= response.encodeURL("top.jsp") %>'

Beginner Question

Hello all, hopefully I have posted this to the correct LiveCycle board!
I'm new to Acrobat and LiveCycle in general. I'm working out of windows LiveCycle Designer 8.x and my question is as follows....
I'm working off of the "Quote" Form Template and what I am looking for is a way to make the rows of the Table expand as needed. I will be converting this Template into a "Purchase Order" form, and there will be many occassions where I will need to increase the table rows - perhaps onto a second or even third page - due to the volume of different items I will be seeking prices on at a given time.
Long story short I would like to take this "QUOTE" form template and make it such that if needed, I can expand the table size one row at a time, pushing the content beneath (Comments, subtotal, etc) onto the next page....
Hoping I have explained my query well enough, Could anyone provide me a solution or point me in the correct direction?
Many thanks!

As a followup, so as not to clog the board with numerous threads I have another beginner question
For the sake of hypotheticals I am creating a dynamic PDF form. This pdf is a Purchase Order Form, with a table in the Body that will expand/contract as the form user needs. (EXA- Default table size is 5 items, however user is creating an order for 12 items, he/she can increase the table rows to desired capactiy.) It will be a very simple layout. All data for the form will come from manual entry, no XML data binding going on.
My new question is as follows:    Is there a way I can have this user's Adobe reader or Adobe acrobat software remember previous data entries, so that if 4 weeks after ordering widget X he/she needs to place another order for widget X, the software will autofill the table as he/she types into the table cell?
This would be similar to how Excel will start to autofill if it recognizes a previously entered value from some other cell in the worksheet (workbook?)
EXA-
[NAME]   [MODEL]   [QTY]   [PRICE]
Widget           A            433        $30.00
Would it be possible for the software to notice that I'm typing the word "widget" somewhere after typing "wid" ???
Many thanks for any and all followups, I'm a teenager trying to help out in my father's small business. They are in the darkages here and I'm doing my best to self teach.
Thanks.

Beginner question: Can I apply one formula to all cells in a column?

Hi,
I'm new to spreadsheets, so apologies for asking what is probably a very simple question.
I want to apply a formula that divides the values in one column (W) by values in another (AX) for a table containing 3000 rows, and outputs the result for each row into the appropriate cell in the new column I've created.
Numbers 09 'help' hasn't helped to this point.
Thanks in advance for any assistance.

GeoBrett wrote:
Numbers 09 'help' hasn't helped to this point.
Besides Numbers '09 Help there are two other useful resources available in the Help menu: the Numbers '09 User Guide and iWork Formulas and Functions Help.
For "Beginner questions," my first choice would be the User Guide. For the specific question you asked, a quick scan of the chapter on "Using Formulas and Functions" (pp 83-96) will provide some useful information. Start in the neighborhood of page 93.
Regards,
Barry

Beginner question regarding 32-bit mixing and mixdown workflow

Hello
I have a beginner question regarding 32-bit mixing and mixdown.
If I edit some 16Bit, 44.1kHz Stereo WAV Files and put them into multi-track view to do crossfades, how should I do the mixdown?
Audition shows me in multi-track view, that it is doing 32-Bit mixing.
Can I just mixdown to 16Bit, 44.1kHz Stereo without any dithering (as the files are 16Bit, 44.1kHz Stereo to begin with), or will I lose quality that way?
I will be performing a normalization to 96% to the mixdown and then split to tracks in Audition, as in the end I want to to have an audio CD.
I guess I could mixdown to 32Bit, then normalize and in the end save back to 16Bit, 44.1kHz Stereo WAV (with dithering, I suppose?), but I want to avoid any unnecessary converting steps.
Greetings

Any time you do any processing on a 16bit file in 16 bit only it will degrade the audio slightly due to rounding of the calculations. Working in 32 bit floating point (Audition's default) takes account of all bits generated due to processing.
So it is always best to work in 32 bit, even if your originals were 16, all the way through until the last stage of saving the files for CD burning. Any losses due to conversion will be insignificant against those due to working 16 bit.

Beginner question - how to efficiently check if a photo is part of the selection

Dear all,
Sorry for this beginner question, however I don't know how to solve it and I'm sure that there is a quick and easy answer to this:
My target is to get all the "heads of stack" (photos with Position 1 in stacks) of the selection ("photos" below).
for i, photo in ipairs( photos ) do
local photoName = photo:getFormattedMetadata('fileName')
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        local photoHeadName = photoHeadOfStack:getFormattedMetadata('fileName')
        app:logVerbose("Photo nb ^1, name ^2 is in a stack with the position ^3", i, photoName, stackPos)
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             app:logVerbose("Photo ^1 is top of the stack ^2", photoName, #stackTop)
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        elseif photos.photoHeadOfStack then
             app:logVerbose("Photo ^1 is in a stack, but not on top. Top of the stack already selected", photoName)
        else
             stackTop[#stackTop+1]=photoHeadOfStack
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        end
end
end
In the if structure in the middle checking the Position in the stack, if the Position is not 1, I would like to check if the photo heading the stack ('photoHeadOfStack') is part of 'photos'. I tried 'elseif photos.photoHeadOfStack then' and 'elseif photos[photoHeadOfStack] then' but it doesn't work ->this elseif is never true even if 'photoHeadOfStack' is part of 'photos'.
Is there anyway to have this check done without checking "manually" photos ?(via for example a for Loop)
I'm sure that Lua proposes this, but I don't know how...
I thank you for your Support!

    --[[ This code creates "stackTops", an array of LrPhotos that are the
    tops of all the stacks containing photos in the array
    "photos". ]]
stackTopSet = {}
for _, photo in ipairs (photos) do
    local stackTop = photo:getRawMetadata ("topOfStackInFolderContainingPhoto")
    if stackTop ~= nil then stackTopSet [stackTop] = true end
    end
stackTops = {}
for photo, _ in pairs (stackTopSet) do table.insert (stackTops, photo) end

Beginner Question: SA520 Admin access through WAN port

Dear all,
I've a beginner question regarding my brand new SA520: How can I configure the box so that I'm able to access the admin GUI not only through the LAN ports but also from the WAN ports?
I tried already to allow inbound traffic to the firewall's internal IP address (not sure if done right, so) and granted the admin user access profile from WAN and LAN: I can access the box from the LAN but not from the WAN. Any ideas?
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Go to Administration -> Users.
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Beginner question: session in JSP

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