How to transmit session attributes

I am trying to transmit SESSION attributes from one JSP to another, it works rather unstable ... may be I'm doing something wrong someone can correct me!!!
sender.jsp
<%session.setAttribute("test", "test"); %>
receiver.jsp
<% String test = (String)session.getAttribute("test"); %>
...

Similar Messages

How to set session attributes in a bean?

How do I set a session attribute in a server-side bean?
I'm not sure if I asked the question the right way. What I meant is, while it's easy to set session attributes in a JSP page (session.setAttribute("sessionname", "sessionvalue")), I'd want to set such an attribute within a server-side bean defined in this web application. But what is the syntax for doing it?

Here a simple bean that stores something in the session and retrieves something from it.
import javax.servlet.http.HttpSession;
public class TestBean {
private String value;
public void doSomething(HttpSession session, int a, int b) {
    if (a+b > 0) {
      session.setAttribute("ab",Boolean.TRUE);
    } else {
      session.setAttribute("ab",Boolean.FALSE);
public void init(HttpSession session) {
    if (session != null) {
      Boolean b = (Boolean)session.getAttribute("ab");
      if (b == Boolean.TRUE) {
        value = "a + b is greater than zero";
      } else {
        value = "a + b is not greater than zero";
    } else {
      value = "no session";
public String getValue() {
    return value;
}In your JSP, use something along the lines of :
<%
TestBean bean = new TestBean();
bean.init(session);
bean.doSomething(session,1,2);
%>If your bean only lives during one request, you can pass the session to the constructor, which stores it in a private variable. This saves passing the session each time.
Hope this helps,
--Arnout

How to get from data entered on a form to a session attribute

I have a jsp with a form with fields that are updated by the user.
The values are in the fields value as I expected.
Example. document.frm.Name.value = "Me"
How do I populate a session variable with document.frm.Name.value?
I think I have to do a request.getParameter("Name") followed by a
session.SetAttribute. But the request.getParameter does not get populated with the latest value in document.frm.Name.value.
Any idea is welcomed. Thanks
Claudiine

Below is the code:
What I want to do is save in the session attribute "mailToAddressList" whatever the user types in the textarea "MailTo"
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.sql.*;
import java.text.*;
import java.io.*;
import com.cname.apl.*;
public class DealTeamServlet extends HttpServlet {
private appUtil util ;
private java.sql.Connection conn ;
private static String dbUrl ;
private static String dbUid ;
private static String dbPwd ;
private static String mailFromAddressList ;
private static String mailToAddressList ;
private static String mailCcAddressList ;
private static String mailBccAddressList ;
private static String mailSubject ;
SimpleDateFormat SDF = new SimpleDateFormat("d-MMM-yyyy");
public void init(ServletConfig config) throws ServletException {
super.init(config);
dbUrl = config.getInitParameter("dbUrl");
dbUid = config.getInitParameter("dbUid");
dbPwd = config.getInitParameter("dbPwd");
mailFromAddressList = config.getInitParameter("mailFromAddressList");
mailToAddressList = config.getInitParameter("mailToAddressList");
mailCcAddressList = config.getInitParameter("mailCcAddressList");
mailBccAddressList = config.getInitParameter("mailBccAddressList");
mailSubject = config.getInitParameter("mailSubject");
if (dbUrl == null)
dbUrl = "*" ;
if (dbUid == null)
dbUid = "*" ;
if (dbPwd == null)
dbPwd = "*" ;
if (mailFromAddressList == null || mailFromAddressList.equals("*"))
mailFromAddressList = "" ;
if (mailToAddressList == null || mailToAddressList.equals("*"))
mailToAddressList = "" ;
if (mailCcAddressList == null || mailCcAddressList.equals("*"))
mailCcAddressList = "" ;
if (mailBccAddressList == null || mailBccAddressList.equals("*"))
mailBccAddressList = "" ;
if (mailSubject == null || mailSubject.equals("*"))
mailSubject = "" ;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
HttpSession session = request.getSession(true) ;
String msgBody = (String) request.getParameter("msgBody");
String uid = (String) request.getParameter("uid");
String key = (String) request.getParameter("key");
Boolean isAuthorized = (Boolean) session.getAttribute("isAuthorized");
java.io.PrintWriter out = response.getWriter();
if (msgBody == null) msgBody = "" ;
response.setContentType("text/html");
if (uid == null || key == null) {
isAuthorized = new Boolean(false);
if ( isAuthorized == null ) {
util = new appUtil();
conn = util.getConnection(dbUrl, dbUid, dbPwd) ;
isAuthorized = util.isAuthorized(conn, uid, key);
util.closeConnection(conn) ;
if ( isAuthorized.booleanValue() ) {
session.setAttribute("isAuthorized", new Boolean(true));
java.sql.Timestamp serverTime = util.getServerTime(conn) ;
java.sql.Date now = new java.sql.Date(serverTime.getTime());
int idEntry = Integer.parseInt(msgBody);
mailToAddressList = request.getParameter("MailTo");
out.println("<html>");
out.println("<head>");
out.println("<title>Team Members</title>");
out.println("<SCRIPT LANGUAGE=JavaScript>");
out.println("function open_window() {");
out.println("document.domain = \"ny.cname.com\"");
out.println("var loc = \"http://peoplelkp.ny.cname.com/peoplelkp/PDLookupService?&emil2=eMail&form=frm&launch=myRoutine()&csr=1&srch=1&adv=1&wc=y&pump=\"");
out.println("loc = loc + document.frm.Name.value");
out.println("var w = window.open(loc,\"Model_Details\",\"scrollbars,width=400,height=450,resizable=yes\")");
out.println("return;");
out.println("}");
out.println("function myRoutine() {");
out.println("document.frm.MailTo.value=document.frm.MailTo.value+\",\"+document.frm.eMail.value;");
out.println("}");
out.println("function submitForm() {");
out.println("alert('submit form')");
out.println("var mailAdd = document.frm.MailTo.value");
out.println("alert('mailAdd='+mailAdd);");
out.println("if ( mailAdd.length == 0 || mailAdd.indexOf(' ') == 0 || mailAdd.indexOf('.com') == -1 || mailAdd.indexOf('@') == -1 ) {" );
out.println("alert('The To: field must be populated. No space are allowed. Email addresses must have valid format. Example: [email protected]')");
out.println("document.all.frm.MailTo.focus();");
out.println("return false;");
out.println("}");
out.println("return true;");
out.println("}");
out.println("function UpdateMailTo() {");
out.println("alert ('I am in UpdateMailTo='+document.frm.MailTo.value);");
out.println("}");
out.println("</SCRIPT>");
out.println(util.getStyleSheet());
out.println("</head>");
out.println("<body bgcolor='silver'>");
out.println("<form name='frm' action='SendMail' method='post'>");
out.println("<b>Team Members</b>");
out.println("<tr>");
out.println("<TABLE cellpadding='0' cellspacing='0' border='0'>");
out.println("<tr>");
out.println("<td align='right'><b>Subject:  </b></td>");
out.println("<td>Deal Team Members Cleared by Conflicts</td>");
out.println("</tr><br>");
StringBuffer bod = new StringBuffer("");
SimpleDateFormat SDF = new SimpleDateFormat("d-MMM-yyyy");
try {
/*get header information*/
CallableStatement st = conn.prepareCall("{call apl_get_sp ?}");
st.setInt(1, idEntry);
ResultSet rs = st.executeQuery();
int id = 0;
int dw = 0;
String cde_proj = "";
String nm_title = "";
String nm_long = "";
String empl = "";
String sid = "";
int userid = 0;
String email_pr = "";
while ( rs.next() ) {
id = rs.getInt("id_entry");
dw = rs.getInt("id_dealworks");
cde_proj = rs.getString("cde_proj");
nm_title = rs.getString("nm_title");
nm_long = rs.getString("nm_long");
empl = rs.getString("empl_name");
sid = rs.getString("id_standard");
email_pr = rs.getString("id_email_ext_unix");
mailToAddressList = email_pr.trim();
out.println("<tr><td align='right'><b>To:  </b></td>");
out.println("<td><textarea name='MailTo' cols='50' rows='2'>"+mailToAddressList+ "</textarea></td>");
out.println("<td>  </td>");
out.println("<td><input type='button' value='Save' onClick='UpdateMailTo()'></td>");
out.println("</tr>");
// out.println("request.setAttribute('mailadd',document.frm.MailTo.value);");
// mailToAddressList = request.getParameter("mailadd");
out.println("<tr><td align='right'><b>Name:  </b></td>");
out.println("<td><INPUT NAME='Name' VALUE='' size=65 ></td>");
out.println("<td>  </td>");
out.println("<td><input type='button' value='Search' onClick='open_window()'></td>");
out.println("</tr>");
out.println("<tr><td align='right'><b>EMail:  </b></td>");
out.println("<td><INPUT NAME='eMail' VALUE='' size=65'></td>");
out.println("</tr>");
if (rslt != null) rslt.close() ;
if (stmt != null) stmt.close() ;
}/*end try*/
catch ( Exception e) {
System.out.println(e) ;
getServletContext().log(e.toString());
out.println("<td colspan='5' align='right'><input type='submit' value='Send email' onClick='submitForm()'></td>");
out.println("</tr>");
out.println("</table>");
out.println("</form>");
out.println("</body>");
out.println("</html>");
mailSubject = "Team Members";
String body = "testing";
session.setAttribute("mailFromAddressList", mailFromAddressList);
session.setAttribute("mailToAddressList", mailToAddressList);
session.setAttribute("mailCcAddressList", mailCcAddressList);
session.setAttribute("mailBccAddressList", mailBccAddressList);
session.setAttribute("mailSubject", mailSubject);
session.setAttribute("mailBody", body);
else {
session.setAttribute("isAuthorized", new Boolean(false));
out.println("You are not authorized.");
//out.close();
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
processRequest(request, response);
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
processRequest(request, response);
public String getServletInfo() {
return "Short description";
}

How to save the login ID as a session attribute ?

I am using form-based authentication in a web application which is being deployed on a JBoss 3.2.3 server. I am authenticating against an Oracle database by way of a DatabaseServerLoginModule (JAAS).
I would like to save the user's login ID as a session attribute in order to be able to use it later in the application.
It's not obvious how you can capture this information and add it to the session, since it seems that the login ID is lost once the authentication is done by j_security_check process.
Is there some way to tell the servlet container to save the login ID as a session attribute as part of the j_security_check process (something along the lines of "if the authentication succeeds add the login ID as an attribute to the session") ?
Is there another approach ? What is the accepted "best practice" for doing session initialization after authentication ? For example if a user needs to have several attributes set in their session after login -- how is this handled ? I have done this before with a login servlet which did both the authentication and the session initialization, but when using form-based authentication and j_security_check it's not clear to me how you go from the authentication to the initialization logic.
Thanks in advance for any suggestions or insight.

You should already have it... hidden in request.getUserPrincipal().getName()

How to revieve all Session Attributes

Is it possible to display all session attributes in a JSF page?
I have tried like this:
<%session.getAttribute("something")%>
But "something" is null, although I know, something must be in this attribute!
Thx for help!

I would be very pleased, if somebody could give me an example or a good internet page where I can find an example how to use an enumerator in an jsf page!
THX!

How to use session in webservice?

In C#, can use session variable in a webservice object.
How to use session in Java webservice?
Who can give me a example?
Thanks a lot

Did I use session in a wrong way?No, you are using the session correctly. The code looks fine.
Check
- your spelling of the attribute names - obviously they must match
- the ids of the sessions you get both times: session.getId(). If they have different ids, then most probably the session is being lost somewhere.
There are a number of reasons to lose a session. If you close the browser, invalidate the session in code, or lose the cookie recording the id. This happens when you change from https to http, so a session can be lost that way.
The session is normally maintained by session cookies. If you close your browser you lose the cookie. If you have disabled cookies on your machine then it also might not work.
In cases such as that you should be using the method response.encodeURL() to maintain the session for you in any hyperlinks you produce. Struts normally handles that for you though if necessary.
Hope this helps,
evnafets

Javascript to JSP question...Can javascript function set session attributes

hello,
i have a web app that, on one of its pages, displays "tabbed pane" as an image map at the top (a la amazon.com). my problem is this: each "logical" page contains separate forms that all use the same javabean. in other words, imagine that the tabs represent an account maintenance web ui for an on-line record store. the first tab might be labeled "General," the second "Contact info," the third "Shipping Info." Each uses the same account bean and displays portions of its properties relevant to the tab at hand. what i want to do is allow a user to enter the account maintenance ui, update info on the first tab, click on tab two and have the request with the changes sent to a processing jsp. yet, since each "tab" is actually a separate URL to another page, how do i get the updated info on the first tabe without adding some sort of "SAVE" button on each tab. ive considered using javascript, but dont know how to get the request params out of the first tab whn i click on another tab. is it possible to include an "onClick" function in each URL that "grabs" the updated form fields off the preceeding tab? can a javacript function set session attributes in jsp?

hello there,
wow, you've created one big mammy-jammy tool.
first, javascript cannot access, set values to the session, without having to post to another JSP. javascript is great for manipulating objects, layers, form values, etc.
you have 2 issues [if i understand correctly]:
1) you need to able to save user info for a specific tab without having to reloading the page.
---you can create a form for EACH of your tabs and POST all the information to a hidden IFRAME or LAYER for NN4. that hidden IFRAME / LAYER will load a JSP page which with all the parameters you posted to it. or you can build a FRAMESET and target that document["frame-name"].src with that same JSP.
2) handling when the SAVE INFO action should happen: hence some javascript event handler: onMouseOver, onClick, etc
---i don't know the dynamics of your tabs, but if store which tab was clicked on last, then if the user clicks on some other tab, javascript can submit that FORM to a JSP [see condition above]
you have an interesting tool. can i see?
i hope i wasn't too confusing, but your problem is sooo interesting. =)
-WJP

How to use session object in jsp

hi all
marry christmas
can anyone plz tell me how to use session obect in jsp
rachna
Message was edited by:
rachna_arora82

hi rachna,
JSP has a default(implicit) session object...... use the getSession(true) method on the session object and then going u can either get or set attributes depending on the requirement
That was in general and now with the issue u have got..... what u can do is that the u can create session for every user who logs in and when he/she tries to login again then u can probably check for the existing session object in the JSP and perform the logic as required..... any clarifications plzzzzzzz let me know
Thanks n Regards
Naveen M
Message was edited by:
Novice_inJAVA
Message was edited by:
Novice_inJAVA

Variable coming from a session attribute

Hello, I am developing a web application with JDeveloper 10g
I've got a View Object which is basically a query, where I use a variable:
WHERE BbCustomerOrderStatusTab.CUSTNO = :CustomerNumber
When I define CustomerNumber in a form, it works:
<af:panelForm>
<af:inputText value="#{bindings.CustomerNumber.inputValue}"
label="#{bindings.CustomerNumber.label}"
required="#{bindings.CustomerNumber.mandatory}"
columns="#{bindings.CustomerNumber.displayWidth}">
<af:validator binding="#{bindings.CustomerNumber.validator}"/>
</af:inputText>
<af:commandButton actionListener="#{bindings.ExecuteWithParams.execute}"
text="ExecuteWithParams"
disabled="#{!bindings.ExecuteWithParams.enabled}"/>
</af:panelForm>
But I would like CustomerNumber to come from a session attribute. I tried something like that:
session.setAttribute("CustomNum","IRI0001");
setCustomerNumber(session.getAttribute("CustomNum"));
with the View Object Editor -> Client Interface setCustomerNumber selected, but it doesn't work.
I tried :
String CustNum=session.getAttribute("CustomNum");
%>
<af:attribute name="#{bindings.CustomerNumber}"
value="<%= CustNum%>"/>
but it tells me that "Attribute value does not accept runtime expressions".
Does someone know how I could do that?
Thanks,
Romain

Hi,
Frank's suggestion should work.
Most importantly, don't forget to declare your bind variable in your view object !!
Your statement looks odd to me
String CustNum=session.getAttribute("CustomNum");
%>
<af:attribute name="#{bindings.CustomerNumber}"
value="<%= CustNum%>"/>
There are many ways to do it. You may try using backing bean for command button's actionlistener or action like the following
class myBackingBean
private String CustNum; //of course with getter and setter method
myButtonAction() {
CustNum = yourFavouriteValue;
OperationBinding ob = getBindings().getOperationBinding("ExecuteWithParams"};
ob.execute();
note you must declare CustomValue in your pageDef's binding to #{yourBackBeanClass.CustNum} in your ExecuteWithParams binding
I don't know and seems not being recommended to set session value in jspx.
Another way is inside your command button in the jspx
<af:setActionListener from="#{somesource.value}"
to="#{processScope.CustNum}"/>
in such case, you must declare CustomValue in your pageDef's binding to #{processScope.CustNum} in your ExecuteWithParams binding
If you have already set session value somewhere beforehand, then what you need to do is simply declare CustomValue in your pageDef's binding to #{sessionScope.CustNum} in your ExecuteWithParams binding.
I did lot of ExecuteWithParams thing and no problems occur so far.

Counting how many active sessions in a webapp

Hi folks,
I was wondering if it is possible to count how many active sessions that there currently are in a webapp? I've looked at the ServletContext and ServletConfig classes, but I can't find anything. Any ideas?
Cheers,
Raj.

HttpSessionListener was introduced in servlet spec 2.3 which is supported in Tomcat 4.0 but not 3.3.
If upgrading to 4.0 is not an option, there is no elegant way to get what you need. There is no API call that returns all the active sessions so you must do it yourself. One way is to create a class that implements HttpSessionBindingListener to track your sessions. Instantiate it on start-up and add its reference as a session attribute when the session is first created. You can then update your custom session info in the valueBound and valueUnbound methods.

Accessing session attribute in output jsp page

Hi i am not getting any output in jsp page...
i am getting just heading
i think some problem with Session attribute..
if so how to access session been in jsp page
my code is here
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%--
The taglib directive below imports the JSTL library. If you uncomment it,
you must also add the JSTL library to the project. The Add Library... action
on Libraries node in Projects view can be used to add the JSTL 1.1 library.
--%>
<%--
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
--%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Tauvex Search Output</title>
</head>
<body>
Tauvex Search Output
<table>
<c:forEach items="${myDataList}" var="myData">
<tr>
<td>${myData.Fitsfilename}</td>
<td>${myData.RA_START}</td>
<td>${myData.RA_END}</td>
<td>${myData.DEC_START}</td>
<td>${myData.DEC_END}</td>
<td>${myData.telescope}</td>
<td>${myData.STARTOBS}</td>
<td>${myData.ENDOBS}</td>
<td>${myData.FILTER}</td>
</tr>
</c:forEach>
</table>
<%--
This example uses JSTL, uncomment the taglib directive above.
To test, display the page like this: index.jsp?sayHello=true&name=Murphy
--%>
<%--
<c:if test="${param.sayHello}">

Hello ${param.name}!
</c:if>
--%>
</body>
</html>
plz reply soon
thanks a lot

this is what i set in servlet
request.setAttribute("myDataList", myDataList);
request.getRequestDispatcher("someJspFile.jsp").forward(request, response);
how can i access that session attribute in jsp

How to address seesion attribute with JSTL?

Hi there,
In login, I have set session attribute of userid, how can I get it in JSTL?
TIA
Wolf

Got it.
sessionScope.attributename
Wolf

Session attribute between JVMs

Hi,
I have a JSP try to send two session attribute from one JSP to another. The target JSP is in different WEB server (JVM). How can I do so that target JSP can use "session.getAttribute" to get the attribute?
1. Cann't use any JAVA Script in JSP.
2. Conn't show or send hidden because I don't want let user see the value of the variable.
Thanks
Kenny

SEND IT VIA HIDDEN BUT INSTEAD OF USING GET METHOD USE POST TO ADDRESS YR SECURITY CONCERNS

HOW TO DESTROY SERVLETCONTEXT ATTRIBUTE

HI
I am having a problem in servletcontext attribute.
I am creating a program to increment the counter everytime the page is refreshed
But the problem is when i reload the application again the counter starts from the last value it was pointing to.
How can i destroy the ServletContext object attribute.

What do you mean by "reload the application"?
Restarting the server should reset the counter back to zero.
If you mean close the browser and then visit the web app again, perhaps you need a session attribute rather than an application level one?
?How can i destroy the ServletContext object attribute?
By using the method of ServletContext: removeAttribute
In a jsp: application.removeAttribute()

URGET!!! Get Session Attribute On Form

Hi alls,
I develope application with Forms 9i and JSP.My Application Program is developed by Forms 9i but Menu,that call application program,is developed by JSP.I knew that if I want to call a Form from JSP,I have to append &otherparams on URL.
My Problems is :
1.I want to get some parameters,is seted to session attribute in JSP,from Menu to Forms and don't let the users to see these parameters on URL. HOW CAN I DO? (URGENT!!!!)
2.If I want the Menu always display on top and application display on botton of browser. HOW CAN I DO?
Thank you for advance.
PS. Menu develop in dropdown style,it will expand(drop) when move mouse on it.

Hi,
1.I want to get some parameters,is seted to session attribute in JSP,from Menu to Forms and don't let the users to see these parameters on URL. HOW CAN I DO? (URGENT!!!!)
You can't get session attribute from Forms because it runs as an Applet in the browser and does not have access to the server side request object.
You can access request parameters that are used to call Forms, but that's it.
2.If I want the Menu always display on top and application display on botton of browser. HOW CAN I DO?
Use HTML frames
Frank

How to transmit session attributes

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