Assigning javascript variables to java variables in JSP

Does anyone know if it possible to assign a javascript value to a java variable in a javascript function? I want to be able to use the javascript value in a PreparedStatement call, but I can't assign the value of the javascript variable to a java variable. I know the opposite can be done using hidden variables in the form, but I need:
javascript -> java variable in a JSP scriptlet.
Any help would be much appreciated,
Thanks,
-Dave

Can't do that.
html/javascript is in the client side.
jsp is in the server side.
In order to put html/javascript values (client side) into jsp (server side) it must be submitted.
Try remoting. Using an iframe with a jsp as the source of it and the html target pointing at it.
-------------

Similar Messages

How can I assign javascript variables to jsp or java variables.?

How can I assign javascript variables to jsp or java variables.?

See I have generated some variables in the javascript which is on the jsp page. I want to assgin these variables to the jsp vaiables. Or how can I access javascript variables from jsp on the same jsp page.

How can i assign a Javascript variable to JSP variable

Hi guys
how i can assign a javascript variable to jsp expression.,
e.g.,
<input type = "button" value = "Add more" onclick = "return submitform1('<%=s%>')">
function submitform1(String s)
      var s1 = s
document.form1.action = "../intimation.do";    /* Here i want to pass the value s1 to jsp or servlets without using hidden fields and Query string*/
       document.form1.submit();
      return false;
/* i want to pass the values thru session whether it is possible */
pls give sample code
Reply
Marimuthu

You don't have the session.
All you have is HTTP.
The only way to communicate from the client to the server is via an HTTP request. The only way to send a value like that is with a parameter.
Using a form with method="submit" as mentioned will pass the parameters without displaying them in the url bar (is that what you wanted?)

I want to assign the value of a Javascript variable to JSP Variable

I want to assign the value of a Javascript variable to JSP Variable .. for example :
<%
Bla Bla Bla
%>
<script>
var JavaScriptVariable="hello"
</script>
<%
String JSPVariable=// The Value of JavaScriptVariable ;
%>
How can i do that ??
Thanks

>I want to assign the value of a Javascript variable to JSP Variable
cannot be done.Friend try to understand concepts properly Javascript is always excuted by the browser @clientside where as JSPCode is executed Websever(ServletContainer) @serverside.Through you are combining JSP Code blocks(Tags,Expressions,scriptlets...) & javascript under a single page webserver can only identify what is their under JSP Code blocks.
Hope this could be an appropriate answer for your question.
However,you can as well submit a request by encoding your URL with request parameters and the submit to the page and then collect it using request.getParameter(name).
But under a single context state it is not possible
REGARDS,
RaHuL

Get javascript variable in JSP

Hi all,
can anybody tell me- how to get javascript variable in JSP,
in the same file (JSP).
Is this possible.
I can use JavaScript to get the value,
but then I have no way to get that to the JSP code.
Please give the appripriate answer with code.
Thanks
amitindia

Hi all,
Thanks for your quick response.
So u are right that we can not call javascript variable
in the same JSP. and pass them to the bean class.
So what I did --- I get java script variable in another JSP using
request.getParameter(); and then redirected to previous JSP.
and I have solve my problem.
Actually I had to call bean class and pass varible to the bean
method but I was getting the same problem that I disscussed but now it
has been solved.
Thanks again for participation
amitindia

How to pass javascript variable to jsp function

i want to check which table header (that is <th> in html )is clicked and based on that a jsp funtion do a query in database and should show records in sorted way according to which column head is clicked.
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Vector varray = workcaseid.getWorkcaseId(Long.parseLong(MasterAccountNumber),SelectedColumn);
<table border="1">
<th ><label onClick="<%SelectedColumn="workcase_id";%>">Workcase Id</label></th>
<th><label onClick="<%SelectedColumn="status_id";%>">Status</label></th>
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im using bean for business login, following mvc model,and i think mvc is one of good design practice to use.
<jsp:useBean id="workcaseid" scope="session"class="beanFiles.SearchWorkcaseId" />
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just tell me whether it is possible to pass javascript variable to jsp variable or not.i can do it by using hidden input type,using form and submit button.

Passing struts-tag value to java / javascript variable in JSP

Hello all,
Im trying to pass the value got from the struts-tag to the java variable in the Jsp. However Im not able to get the o/p. Can u guys help me on this pls...
<logic:notEmpty name="TreeBean" property="list">
    <logic:iterate id="Type" name="TreeBean" property="list" indexId="i">
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<% List jspList = null;
%> I want the values into the jspList variable for further processing. Can u guz pls help me on this....

Which do you want it in?
A java variable for use in <% scriptlet code %> or a javascript variable for use on the client end?
scriptlet:
<jsp:useBean id="TreeBean" type="java.util.List" class="java.util.ArrayList" scope="?????" />
Having scriptlet code on the page is considered bad coding style.
What is it you are trying to accomplish by making the value accessible?
What are you trying to do in java / javascript that can't be done with JSP tags?

Need a fast answer... passing javascript variable to jsp page (how to use)

This test application has 3 frames.
I'm assigning a value "stuff" to a variable ("testfield1") in a javascript function ("getTest") that exists inside an html frame (testpage1.html)
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In function ("getData"), I am passing the variable "testfield1" as a parameter to the "getData" function in "testpage2".
In "testpage2" - in the ("getData" function) I try to assign the value of the variable "testfield1" to another variable called "testfld1".
Then, I try to extract the value of "testfld1" into a variable called "tstfld1" in a JSP scriptlet
....I.E. [ String tstfld1 = request.getParameter("testfld1"); ]
But, the value is apparently not passed successfully, as tstfield1 appears to be "null".
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The code for this test app is below...
********testpage0 - the parent frame*********
<HTML>
<HEAD>
<TITLE>GlobalView Reports and Trending Menubar</TITLE>
</HEAD>
<FRAMESET FRAMEBORDER="0" ROWS="15%,85%">
<FRAME SRC="testpage0.html" NAME="testhtmlparent">
<FRAMESET FRAMEBORDER="0" COLS="23%,77%">
<FRAME SRC="testpage1.html" NAME="testhtml">
<FRAME SRC="testpage2.jsp" NAME="testjsp">
</FRAMESET>
</FRAMESET>
</HTML>
*******testpage1.html********
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<html>
     <head><title>testpage1</title>
     <link rel="stylesheet" type="text/css" href="./standard.css">
          <script LANGUAGE="JavaScript">
          parent.frames[2].location = "blank.html";
          function getTest(reportType)
               testfield1 = "stuff";
               alert("testpage1.html...testfield1=" + testfield1 + ", reportType=" + reportType);
               parent.frames[2].location = "testpage2.jsp";
               parent.frames[2].getData(testfield1);
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     <body bgcolor="#FFFFFF" text="#000000">
          <form name="reportRange">
               <center>
                    <fieldset style="padding: 0.5em" name="customer_box">
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                         <tr class="drophead">
                              <td valign="top" height="0" ><span class="drophead">
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                              </td>
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                    </table>
                    </fieldset>
               </center>
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*******testpage2.jsp*********
<%@ page language="java" import="java.io.*, java.util.*" errorPage="error.jsp" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<html>
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               alert("testpage2.jsp...testfield1=" + testfield1);
               document.pageData.testfld1.value = testfield1;
               document.pageData.submit();
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     </head>
     <body>
          <%
               String error;
          %>
          <div id="HiddenForm">
               <form name="pageData" method="post" action="testpage2.jsp" target="_self">
               <input type="hidden" name="testfld1" value="0">
          </form>
          </div>
          <%
               String tstfld1 = request.getParameter("testfld1");
          %>
          <P> testfld1 = <%= tstfld1 %> </P>
     </body>
</html>

parent.frames[2].getData(testfield1); is in testpage1.html
so in the document.pageData.testfld1.value = testfield1; document = testpage1.html( not testpage2.html)
modifying the getData to accept the document object, and refering this object to parent.frames[2].document may help you.
good Luck ....

How to assign Javascript variable to ABAP variable

Hi All,
I have a requirement to create a page where each of the table cells will have drop down boxes with Red, Yellow and Green colors.
When the user selects the color it has to be saved to database.
Now the problem is, I'm using HTML as HTMLB was very complicated for the kind of layout the client needed.
I have created a onChange event for each of these drop down boxes (please keep in mind the dropdown ids are dynamically created by looping the ABAP internal table).
I'm passing this.id on change event and capturing the id name. Now using this id I have to read an internal table.
But the problem is, this is javascript variable and cannot be passed directly to read table statement.
Please help me in this regard.
Lots of points will be given for valuable inputs.
PS: I have gone through the thread Assign a Javascript variable value to a ABAP variable
But doesn't seem to work for my case as I'm using HTML.

Hi Chait,
you need to populate a HTML form field with the variable. Most commonly people use the...
<INPUT type="hidden" id="param1">
construct.
In your javascript you can then just set the value of param1.
Of course you could also dynamically create the elements at runtime in your javascript code.
Cheers
Graham Robbo

Sharing JavaScript variables with JSP

Hello everyone --
I was pretty smug when I thought that I could store JavaScript variables in a hidden input parameter for the JSP to pick up.
When I run:
<script language=javascript>
if(confirm("Do you really want to delete this user?"))
document.write("<input type=hidden name=confirmusr value=true>");
else
document.write("<input type=hidden name=confirmusr value=false>");
</script>
<b>User input was <%= request.getParameterValues("confirmusr") %></b>I get: User input was null
I thought that at first I needed to escape the " in write(), but that wasn't it. Does anyone know why it seems that JS is not creating that hidden input type? Thanks in advance for any suggestions, Kwj.

You can do it this way:
<form name="myForm" etc etc>
etc
<input name="confirmUser" type="hidden" value="">
etc
<script language="javascript">
function onClickHandler() {
if (confirm("Do you really want to delete this turkey?"))
document.myForm.confirmUser.value = "true";
else
document.myForm.confirmUser.value = "false";
document.myForm.submit();
</script>
etc
<input name="button" type="button" value="Delete Turkey" onClick="onClickHandler()">
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Assigning javascript variable to java variable??

I'm working on a web app, and part of it is form to add/update customers information. What my problem is I have all the cities of the US and Canada in a database and was using javascript to load the cities depending on which province/state is selected from another list box. Because the database is so large it takes a long time and everytime the page loads it takes a long time because the java code runs. The cities are loaded into the page by a javabean which returns a vector with all of the cities. What I want to do is use the province or state id to pass to the bean and just retreive the cites for that state as oppose to loading all of them. However, I'm stuck with assigning that value from my list box, which I would use javascript to determine, then passing it as a parameter to the bean.
From the research I did, it seems like it can't be done. I'm seeking some advice thoough, as there would be someone who had this problem before and solved it or found a work around. Would be grateful for any help and advice. below is a part of my code that's presenting the obstacle.
<script type="text/javascript">

</script>
</html>

How about doing this:
<html>
<head>
<script language="JavaScript">
vfnStateChange = function() {
     var oState = document.forms['myform'].state;
     var sState = oState.options[oState.selectedIndex].value;
     document.location.href='thispage.jsp?state=' + sState;
</script>
</head>
<body>
<form name="myform" action="somepage.jsp">
<select name="state" onchange="vfnStateChange();">
<%
ArrayList stateList = somebean.getStates();
for(int i = 0; i < stateList.size(); ctr++) {
     State s = (State)stateList.elementAt(i);
%>
<option value="<%= s.getStateId() %>"><%= s.getStateName() %></option>
<% } %>
</select>
<select name="city">
<%
String state = request.getParameter("state");
if(state == null) {
%>
<option value=""></option>
<%
} else {
     ArrayList cityList = somebean.getCities(state);
     for(int i = 0; i < cityList.size(); i++) {
          City c = (City)cityList.elementAt(i);
%>
<option value="<%= c.getCityId() %>" <%= c.getStateId().equals(state) ? "" : "selected=\"selected\"" %>><%= c.getCityName() %></option>
<%
%>
</select>
</form>
</body>
</html>

How to get javascript variable in jsp variable

Hi all,
i have a variable str in my javascript function
var str = somevaluei want this str value in jsp variable in the same page...
how can this be done..???
any ideas...
Thanks

I dont know if its possible or not.
Actually it depends on what do you want to do with the variable.
as far as assisginng value to the hidden variable is concerned it can be done this way.
<% jsp code
String hiddenVar = "";
%>
< html code
<input type type = "hidden" name="hidden" vale="<%=hiddenVar %>"
html ends>
while in js function you can assign vale to the hidden variable which will ultimately assign value to the JSP variable as follows.
var str = "value";
document.form_name.hidden_field_name.value = str.
hope this hepls.

How do i compare value javascript variable with jsp variable

I have promblem .I have variable that store store the attribute value of column .The colum has more then one value.How to i compare with javascript value .Currently I am using the following method .
<%String sql_query3 = "SELECT DISTINCT (ir_tran_typ),ir_rea_desc "+
                                          " FROM intrcd "+
                                          " GROUP BY ir_tran_typ ";
                           System.out.println("trans type"+sql_query3 );
                            try{
                                rset = db.execSQL(sql_query3);
                            catch(SQLException e) {
                                System.err.println("Error in query - intrcd - transaction_main.jsp " +e +" sql " +sql_query3);
                            while(rset.next()== true){
                                tran_cde = rset.getString("ir_tran_typ");
                                        rea_desc = rset.getString("ir_rea_desc");%>
                                        <%System.out.println("trans type 34 "+tran_cde );%>
                                             //tran_typ = addElement('<%=tran_cde%>');
                                             <% }%>
                                  if(obj.value== '<%=tran_cde%>' ){
<%                                String sql_query2 = "SELECT ir_rea_cde,ir_rea_desc"+
                                          " FROM intrcd"+
                                          " WHERE ir_tran_typ = '"+tran_cde+"' " +
                                                    " ORDER BY ir_rea_cde ";
                           System.out.println("trans type"+ tran_cde);
                            try{
                                rset = db.execSQL(sql_query2);
                            catch(SQLException e) {
                                System.err.println("Error in query - emmast2 - transaction_main.jsp " +e +" sql " +sql_query2);
                                    index = 1;
                            while(rset.next()== true){%>
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please replay me soon
thank you.

javascript and java do not mix.
Java code runs, and produces HTML/javascript.
Java code stops running.
The page loads in the browser, and it starts up javascript.
Javascript cannot talk to java and vice versa.
Your JSP can generate javascript code onto the page to be executed on the client, but they never directly communicate.
please replay me soongame over dude ;-)

Using Javascript variable in JSP

I m setting a variable named btn to the value of the button which was clicked but the problem here is that i m nt getting its value whn i want to set it to a request.setAttribute() method.

> Yes... nw i get the prob... thanx yaar .... bt cn u
suggest me wht cn i do fr this situation
My first suggestion, beyond all others, is to use real words. Your writing is practically unintelligible.
Please make the extra effort to write out words such as "now", "problem", "thanks", "but", "can", "you", and "for" (I have no idea what "yaar" means). The extra keystrokes won't cost much in the way of time, and the enhanced clarity will be appreciated by those communicating on a forum with international readership. Also, it will give the appearance that you take your question seriously, which will in turn make your question look more interesting to answer.
~

How to assign a JSP variabl's value to a JavaScript variable?

Hello,
I want to assign a JSP variable's value to JAVASCRIPT variable.
or how to assign JavaScript variable's value to JSP varialbe
HOw do i do it ?
can anyone please help?
Regards and thanks for your time.
Ashvini

I want to assign a JSP variable's value to
JAVASCRIPT variable.
var jsVariable = <%=someVariable%>;
or how to assign JavaScript variable's value to JSP
varialbeYou can't. JSP is server-side and JavaScript is client-side. The JSP variables are never available on the client side for any sort of assignment.

Assigning javascript variables to java variables in JSP

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