Accessing JSTL values from JSP

I've run into a problem I'm not sure has a solution. Could be bad design on my part, or just a poor imagination. If this has been answered previously, please point me to the post.
I am using some JSTL to do a SQL query and displaying the records in a select box:
<sql:query var="aResults" sql="select * from TYPE_STATE_LIST where tslAllowable=1" />
<c:forEach var="oRecord" items="${aResults.rows}">
<option value="<c:out value="${oRecord.tslID}" />"><c:out value="${oRecord.tslFullName}" /></option>
</c:forEach>I want to be able to reset their selection to the value they entered when the form is refreshed, though. I'm trying to figure out how to grab the oRecord value from the JSTL and use it in a JSP IF statement:
<% if( oRecord.tslID==request.getParameter("state") ) { %>
<option selected value="<c:out value="${oRecord.tslID}" />"><c:out value="${oRecord.tslFullName}" /></option>
<% } else { %>
<option value="<c:out value="${oRecord.tslID}" />"><c:out value="${oRecord.tslFullName}" /></option>
<% } %>I thought about using the JSTL <c:choose> tag instead, but then how would I access the previous value with request.getParameter()?
Any suggestions?

${param.state}It's better if you place the sql query into a class rather than display it in the jsp, it's more flexible and programmable.

Similar Messages

Passing value from JSP to scriptlet

Hi
I am trying to find a way to pass a value from jsp to the scriptlets, i.e.
<c:set var="testValue" value="123" />
<%
System.out.println(testValue);
%>
the above code just demonstrates what I was trying to achieve, by passing the value from the jsp into the scriptlet.
Can someone tell me if there's an easy way to do this?
Thank you.

Note, using scriptlet code on your page is generally something to be avoided. 99% of what you should be doing on a JSP page can be done with EL/JSTL. If you can't do it with EL/JSTL then it probably belongs in a servlet/bean.
I always aim for 100% scriptlet free jsp pages.
Having said that, I can still answer your question: EL attributes are stored in the scope - page, request, session, application
${testValue} is equivalent to pageContext.findAttribute("testValue").
The <c:set> tag example doesn't specify a scope, so therefore you could get it like this:
<c:set var="testValue" value="123" />
<%
String testValue = (String)pageContext.getAttribute("testValue");
System.out.println(testValue);
%>alternatively exploit the feature of the useBean tag that creates a scriptlet variable:
<c:set var="testValue" value="123" />
<jsp:useBean id="testValue" type="java.lang.String"/>
<%
System.out.println(testValue);
%>Note that the EL variable and the Scriptlet variable are initially pointing at the same String.
But changing the string in scriptlet code will change the value it is pointing at, while leaving the EL variable untouched.
If you have a List in scope, and sharing it between EL and scriptlet variables then any changes to the list would be reflected because they both point at the same List object.
cheers,
evnafets

Urgent-how to access custom tag from jsp tag

I have a problem accessing a custom tag from a jsp expression.
Details: I have a custom tag that returns a string variable. I need to access that variable from jsp expression <%%>.
Can any body help me?

Tags don't "return" values as in the normal sense.
They can only support TEI (Tag Extra Information) that just stuffs a declared variable into the page's state.
For example, if the tag class had a public method called getValue(), you could do the following:
<xmp:mytag id="foo"/>
<%
out.println("value is " + foo.getValue());
%>

Problem with accessing init parameters from JSP file

Hi,
I have my init parameters and Jsp configured in web.xml
<servlet>
          <servlet-name>TestJsp</servlet-name>
          <jsp-file>/Test.jsp</jsp-file>
          <init-param>
               <param-name>username</param-name>
               <param-value>Balboa</param-value>
          </init-param>
</servlet> How do I access 'username' field from JSP file.
Kindly help.
Thanks.

you can do this in the jsp
<%=config.getInitParameter("username")%>or do it in the jspInit method in the jsp:
<%! String userName = null;
public void jspInit() {
    ServletConfig config = getServletConfig();
    userName   = config.getInitParameter("userName ");
%>
Hello <%=userName%>

Values from JSP to Struts Action Class

Dear All,
Am working on a small struts project, i want to get values from JSP in the Action class, i tried with sending variables using request through URL, it works fine, any other way is there to send the values from JSP to action class. Am not having any input fields in the JSP.I have links.
Thanks,
vyrav.

I have a dispatch action for that am calling the action like this viewfiles.do?parameter=edit, and i have to send a variable ID from the same page, so am doing like this through java script, viewfiles.do?parameter=edit&id=10. Am able to get the id in the dispatch action edit, but when i start tomcat with security manager its not calling the action itself and its giving accesscontrol exception, but when i directly type viewfiles.do in URL its calling the action.
I dont know wats the problem, tomcat security manager not allowing this. Please help me.
Thanks,
vyrav.

Passing value from JSP to JApplet

Hello,
I am stuck up with a problem, can anyone please tell me how do i pass a value from a JSP page
to a JApplet,
and the parameter passed through JSP should be displaed in the JTextArea.
It would be kindful if any of you could help.
Thanks
Sanam

hello,
thanks for reply.
I know how to pass parameters from html,
I want to pass values from jsp page,
and i dono how to do it, may be we cann pass values through url connection but i dono how.
if anone knows plz help me in solving this.
i hvae posted my applet code.
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.JToolBar;
import javax.swing.JButton;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import javax.swing.JPanel;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.sql.*;
<applet code = "DocApplet" width = 500 height =5000>
</applet>
public class DocApplet extends JApplet
     private JPanel jp;
     private Container cp;
     private JTextArea jt;
     private JToolBar tb;
     private JScrollPane sp;
     private String annotation;
     private String url;
     private Connection con;
     private Statement stmt;
     public void init()
          jp = new JPanel();
          cp = getContentPane();
          jt = new JTextArea();
          tb = new JToolBar();
          sp = new JScrollPane(jt);
          repaint();
     public void start()
          jp.setLayout(new BorderLayout());
          jp.add(tb, BorderLayout.NORTH);
          jp.add(sp, BorderLayout.CENTER);
          jt.setBackground(Color.BLACK);
          jt.setForeground(Color.WHITE);
          setContentPane(jp);
          addButtons(tb);
          repaint();
     public void run()
          repaint();
     public void paint()
     private void addButtons(JToolBar tb)
          JButton button = null;
          button = new JButton("Save");
          button.addActionListener(new ActionListener()
               public void actionPerformed(ActionEvent e)
          tb.add(button);
}

How to access COM+ Objects From JSP

Friends,
We have a requirement to access COM+ objects from JSP. Please guide me on this.
Thanks in advance.
Tarani

Sanyam wrote:
if there is any .dll extension file, how can we read that file in labview?
You can use Call Library Function node to call that dll file and use it in LabVIEW. Read the help and you will get more details.

How to pass value from jsp to java bean

I have huge problem . How to pass value from jsp value to java bean.Please replay me soon

Use the <jsp:setProperty> tag. There are several ways to use it. The one you probably want is:
<jsp:setProperty name="bean_name" property="property_name" value="the_value_you_want_to_set"/>

Getting values from jsp in portlet

Hi,
I want to know if I submit values from a jsp page how can get those values in the portlet class (extends Generic portlet). I have tried accessing using actionRequest.getParameter() and also renderRequest.getParameter(). But I get null value .
Do I need to add the below shown line also to the jsp -
<portlet:defineObjects/>
I am working with JSR 168 portlet. I am posting part of the jsp down let me know how can I go about this problem.
<%@ page language="java"%>
<form name="userForm" method="post">
<table>
<tr>
     <td>User Name</td>
     <td>
          <input type="text" name="userName"/>
     </td>
</tr>
<tr>
     <td>
          <input type="submit" label="Save"/>
     </td>
</tr>
</table>
</form>
Thanks

Hi ,
I created a sample portlet the way it is in notepad portlet and it worked fine for me . But the main difficulty is I am trying to convert an existing code and there the form submission happens in java script .The following code is used to submit the form and there I am not able to get the values in processAction().
Please check the java script code and let me know if I can change it in someway which can make the submitted values available in the processAction().
document.forms[0].action ='<portlet:actionURL><portlet:param name="mode" value="dummyVal"/></portlet:actionURL>';
document.forms[0].submit();
Thanks..

Passing value from JSP to Action in Struts

Hi,
I am populating JSP page with rows retrieved from the database and
represented as a List of Beans in forEach loop:
<c:forEach var="list" items="${OperationsForm.OperationsList}">
<c:choose>
<c:when test="${list.isCompleted =='Y'}" >
<td width="100">Completed</td>
<td width="100"> </td>
</c:when>
<c:otherwise>
<td width="100">Pending</td>
<td width="100"><input type="image" onclick="
rowId=value; form.action='action.do?command=notify'"
value="${list.OperationId}" />
</td>
</c:otherwise>
</c:choose>
</tr>
</c:forEach>
Have hidden field: html:hidden property="rowId" value="-1"/>
User is clicking the button corresponding to one of the rows
and I need to pass the value of that rowId to the Action class, so it does
something in the database [action completed]
Now how do I pass it , is that the right way of doing it with calling
request.getSession().getAttribute(rowId) in the Action class ?
As of now I am getting Javascript error "Object doesn't support this
property or method", complaining about rowId=value;
Using Struts 1.3
Please help !
TIA,
Oleg.

So what you are saying is that I should add rowId here:
<input type="image" onclick="form.action='action.do?command=notify&rowId='
${list.OperationId}"/> , correct ?
I am not sure that it will work, especially with Struts tag.
I will probably try something like:
<html:submit onclick="form.action='action.do?command=notify'" value="${list.OperationId}">
I am relatively new to Struts, so now sure what will work or not and how to do it better. How do I catch the submitted value in the Action in either of these 2 cases, via action.getSession().getProperty("rowId") /
action.getSession().getProperty("submit") ?
I would probably do it as a URL rather than changing the action of the form.I will have to create a new action anyway to process that row [which is sending user e-mail regarding that row data/event].
Is the id the only thing you have to pass in?
Or do you need other values from the screen?Selected rowId is probably the only thing I care about, can access values from the Form in Action.
Thank you,
Oleg.

Can't retrieve bean value from jsp!

Here's the chain of events for my web app:
JSP form (get info from user) -> forwarding jsp (uses bean to save info submitted to form)-> servlet (retrieves info from DB) -> JSP (presents DB info to user by populating values in text fields from original form)
Right now, I can access all the values submitted to the first JSP from my servlet. However, after my servlet retrieves the info from a db and stores it in a bean and forwards the request (using requestdispatcher) to the 2nd JSP, I can't get the values from the bean from the 2nd jsp. I was able to use the bean to store the information submitted to the original JSP, however.
Here's some relevant code:
FROM FORWARDING JSP (which saves user-submitted info in bean)
<jsp:useBean id="fxFormBean" class="fxmatcher.FxFormBean" scope="request"/>
<jsp:setProperty name="fxFormBean" property="*" />
<jsp:forward page="/FxMatcher" />
FROM LAST JSP (which should populate form fields)
header stuff:
<jsp:useBean id="fxFormBean" class="fxmatcher.FxFormBean" scope="session"/>
info retrieval:
<INPUT TYPE="text" NAME="fx_key" value="<%= fxFormBean.getFx_key() %>">
I wrote this JSP based on the example given here: http://www.jsptut.com/Editing.jsp, but I'm not getting the value from the bean. The result JSP just has value="".
I'm pretty sure that my servlet is saving the info to bean correctly, but here's the code anyways:
//retrieves info from DB
FxFormBean fx = (FxFormBean) request.getAttribute("fxFormBean");
fx.setFx_key (traderKey);
fx.setAa_block(agent_block);
fx.setAddition_to (additional_to);
log("trader key: [" + fx.getFx_key() + "]"); //debugging code
My debugging code did print out the correct info, so I don't think there's anything wrong with the bean or the servlet.
I would appreciate any help. Thank you very much.

The first JSP puts the bean in the request, the servlet retrieves the bean from the request and updates it but in the second JSP you set the scope to session:
<jsp:useBean id="fxFormBean" class="fxmatcher.FxFormBean" scope="session"/>
So the second JSP is looking in the wrong place for your bean. Change the scope in the second JSP to request:
<jsp:useBean id="fxFormBean" class="fxmatcher.FxFormBean" scope="request"/>

How is JSTL different from JSP?

What is JSTL & how exactly is it different from JSP?Is it more powerful than JSP,Where can it be used & can i get an example of it.

JSTL is addition to JSP technology. It is set of html-like custom tags, that allows web page developers to do typical tasks without coding in java, but using reusable out-of-the-box tags.
like
<%@ taglib prefix="fmt" uri="http://java.sun.com/jstl/fmt" %>
<html>
<body>
<h1>Formatting with the default locale</h1>
<jsp:useBean id="now" class="java.util.Date" />
Date: <fmt:formatDate value="${now}" dateStyle="full" />
Number: <fmt:formatNumber value="${now.time}" />
</body>
</html>Take a look at http://java.sun.com/products/jsp/jstl/ for more details

How to access a value from "List of Values" by giving a name?

I have a "List Of Values" defined in my BI Report. It comprises list of label-value pairs.
I have defined a parameter :p_Value for the above "List Of Values" defnition. this parameter is used in datasource sql defnition to filter the query results. I configured a template which has a table that shows all the parameters used for filtering query results. If I give <?$p_Value?> in the template then the parameter value is rendered on it. But I want the "name" of the parameter and not the value. Can anybody tell me how to access name of the parameter which refers to one of value in "List of Value" defnition?

option 1:
Can you get the value from the DB in the report sql ?
You have the code, inside the report query, if you can get the decoded value form that
option2:
create another paramater, LOV and query, and make it as hidden, and use the first :param_1_value in the lov query in the second param and decode the value.
Now , you can refer the :PARAM_2_value in template which will have decoded value.

Displaying values from JSP in textbox

I want to fetching values from database table using JSP and display the values in a textbox in a textbox. I found if the value is a single word, it can display correctly. but if the values are multiply words, there are just the first word appeared in the textbox. for example, I want to fetche address: 5 East 98th Street, just 5 appeared in textbox. The code is as follows:
key = request.getParameter("key");
person = homePerson.findByPrimaryKey(key);
<input type="text" name="Address" value= <%= person.getAddress() %>>
Can someone suggest on this problem. Thanks in advance.
Qiang

<input type="text" name="Address" value= <%=
person.getAddress() %>>do this
value="<%=person.getAddress()%>"
dont forget the code... as in html spaces are ignored in values if they are not in codes.

How to access attribute value from another VO using groovy?

Hello, I am using JDeveloper 11.1.2.3.0
I read a lot of information about this but still I am missing something. I am trying to set the value of a bind variable through Groovy expression in my VO. I want this Bind variable
to have the value from an attribute from another VO. I tried ''adf.object.MyAppModuleImpl.findViewObject('Users1').currentRow.Iduser''
I am getting "oracle.jbo.expr.JISyntaxError: Variable MyAppModuleImpl not recognized". I tried with 'MyAppModule' only but the result is the same.
Can anyone help please?
Thanks

Check out http://www.oracle.com/technetwork/developer-tools/adf/learnmore/august2011-otn-harvest-457288.pdf Page 18 'Optimized Groovy data access to view objects'
Timo

Accessing JSTL values from JSP

Similar Messages

Maybe you are looking for