Passving javascript variable Values to java variable

I need help from anywone please.
I created a SELECT object on a jsp. I want to retrive the highlighted element in the list and put this value in a java variable so that I can send the value to another page. How can I achieve this please?

Alaafiatayo wrote:
I created a SELECT object on a jsp. I want to retrive the highlighted element in the list and put this value in a java variable so that I can send the value to another page. How can I achieve this please?Your terminology is fairly confusing. Please align the right terminology for yourself.
As far I understand you want to get the currently selected value of a HTML dropdown element in the server side? Just submit the form to the server and use request.getParameter("nameOfInputElement") where "nameOfInputElement" is the same as <select name="thisName">.
This is covered by every decent JSP/Servlet tutorial. I recommend you to go through it first before asking this kind of basic questions.

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Assigning javascript varibel value to java variable

Hi all
I want to find screen resolution in one jsp page.That can be done in javascript.
(though 'screen.width and screen.height')
But is there any way to assign that value to java variable.
Any body has the idea?
Help me.

No, why ? becuase jsp is SERVER side
There are workarounds, You can store your javascript values in hidden fields and submit your page with them to your JSP and then use them like that

Assigning javascript varible value to java variable

Hi all
I want to find screen resolution in one jsp page.That can be done in javascript.
(though 'screen.width and screen.height')
But is there any way to assign that value to java variable.
Any body has the idea?
Help me.

No, why ? becuase jsp is SERVER side
There are workarounds, You can store your javascript values in hidden fields and submit your page with them to your JSP and then use them like that

Assigning a java value(filepath) to a javascript variable

I have a JSP where I have a java variable(obtained from session) which is nothing but a filepath(say C:\superb.xpdl). When I try to use the variable in javascript using var scriptVar = "<%= sessionVar %>";, the sessionVar value i.e. the filepath is getting modified (like C:superb.xpdl). Slashes are interpredted in a different way(\t for tab, \n for new line etc.,) How to get the filepath with no modifications while assigning to javascript variable? will encoding(using escape()) and decoding help?

unfortunately you need to double up the slashes
maybe this will work
scriptVar = "<%= sessionVar.replaceAll("\\", "\\\\") %>";
or maybe it will cause a infinite recursion problem (i'm too lazy to try it)

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">
     <br/><bean:write name="Type" />
    </logic:iterate>
</logic:notEmpty>Here the list can be populated in the jsp page. However i want the values into jsp list. Im not able to populate the same..
<% 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?

How to access javascript variable's value in a jsp tag?

Is there any way to access the value of a javascript variable in jsp?

Hi
by the way your question is ambigous, i understand the question to some extent here i there is a sample code which may be help full to you. As this problem is faced by me when i was developing some dynamic pages in my company.
<%@ page language="java" %>
<html>
<head>
<script language="JavaScript">
var i = 10;
var k = 20;
</script>
</head>
<%
     String Jspi = "";
     Jspi = ("<script>document.write(i);</script>");
     out.println(Jspi);
     Jspi = ("<script>document.write(k);</script>");
     out.println(Jspi);
%>
</body>
</html>
This will help u out.
Cheers
Rambee

How to pass a JavaScript variable into a java method

I would like to know how to pass a JavaScript variable into a java method with in a <% %> tag inside a JSP file like so:
<%@ page contentType="text/html;charset=windows-1252"%>
<html>
<head>
<script LANGUAGE="JavaScript">
myValue = someDynamicValue;
<% System.out.println(myValue)%>
</script>
</head>
<body>
</body>
</html>
obviously "System.out.println(myValue)" will not work because myValue is seen as a java variable and not a JavaScript variable.
I would like to know how to let the jsp file, that I wrote in the above code, see myValue as a JavaScript variable and not a java variable so that I can pass it to a java method.
NOTE: the java method does not have to be a println() method, it can be any method of my choice.
NOTE: someDynamicValue is a JavaScript value that can dynamically change

I don't believe you can. JSPs are really just elaborate templates that an engine such as Tomcat parses and generates an HTML page based on. That page is then displayed to the user. By the time you want to use some function in Javascript, the JSP has already been parsed and generated.
Basically, Javascript and JSPs can't talk to each other. One's server-side and the other is client-side.

How to access a javascript variable from Java?

Here is my code:
function validateLoginForm() {
    var username = document.getElementById('un');
    setCookie('un', username, 3650);
    //etc.
<%
    HttpSession httpSession = request.getSession();
    httpSession.setMaxInactiveInterval(30 * 60); //30 minutes
    httpSession.setAttribute("un", username); //!prob here - cannot resolve 'username'
%>
}...but how do I access the javascript variable 'username' from the Java code?
Thanks,
James

The only way to pass values between JavaScript and JSP is through cookies. It sucks, I know, but right now that is the only option.
You already are creating a cookie in JavaScript. So go ahead and read it in Java:
Cookie[] cookies = request.getCookies();
for(int i = 0; i < cookies.length; i++) {
    Cookie c = cookies;
if (c.getName().equals("un")) {
// Do what you need here.

Java code based on a javascript variable

Hi,
Based on click of a either linkA or linkB I set a javscript variable (say vA or vB).
After this I reload the browser.
My page on the browser in a jsp which gets texts from a properties file (say prop.properties).
But now based on vA or vB I wish to load vAprop.properties or vBprop.properties.
I know I cannot access javascript variables in Java code. Please let me know a work around for this.
I need it very badly.
Thanks in advance.

Have your javaScript open the link with a parameter
yourFile.jsp?param=A
yourFile.jsp?param=B
in your JSP do a
request.getParameter("param");
You can also use javaScript to post the values if you dont want them to appear in the URL.

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.
-------------

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){%>
                            document.all.rea_cde.options[<%=index%>] = new Option(eval('"<%=rset.getString("ir_rea_cde")%>"'));
                            document.all.rea_cde.options[<%=index%>].value = eval('"<%=rset.getString("ir_rea_cde")%>"');
                            document.all.rea_cde.options[<%=index%>].text = eval('"<%=rset.getString("ir_rea_desc")%>"');
<%                          index++;
                                   }%>
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 ;-)

How to pass the javascript variable value to a jsp

Hi
I am trying to set a javascript variable with onClick event of a radio button in jsp
and I am assigning this variable to a hidden property in JSP whic has the corresponding getter an setter method in form.
But I am not able to retrtieve the value assigned in either form/action .can any body help me in this:
The code is
<script language="javascript">
var jais="";
     function setValue(val)
          jais=val;
     document.o.value=jais;
</script>
     <html:hidden property="o" value=""/>
<input type=radio name="1"
                                        value="xyz"
                                                                      onclick="setValue('XYZ')" >
                                        ABC
and in the correspoding form bean I have
private String o_val =null;
public String geto()
return o_val;
public void seto(String strs)
o_val=strs;
In the action I am trying to access
by
1)String j=((form name)form.geto();
2)String j=request.getParameter("o")
but with both of them I am getting the value null
Thanks in Advance

You need to set the value of the hidden field in your function.
Setting an unrelated variable will not help.
function setValue(val)
document.forms[0].o.value = val;
also your get/set methods should be getO() and setO().

Assign a Javascript variable value to a ABAP variable

Hi,
   I wish to assign a javascript variable value to a ABAP variable. Any ideas how to do that?
    Many thanks.
Rgds,
Bernice

Here's another suggestion for you.
BSP Application: SBSPEXT_HTMLB
Check out the radionbuttongroup.bsp
So then instead of using a standard HTML radio buttons you can use the HTMLB element with the parameter for onClick set then in your DO_HANDLE_EVENT you can read the value.
VIEW
<htmlb:radioButtonGroup id="radio">
<htmlb:radioButton id="id_link"
                   text="Link"
                onClick="myClickHandler"/>
<htmlb:radioButton id="id_unlink"
                   text="Unlink"
                onClick="myClickHandler"/>
</htmlb:radioButtonGroup>
DO_HANDLE_EVENT
DATA:   lt_event        TYPE REF TO if_htmlb_data.
lt_event = cl_htmlb_manager=>get_event_ex( request ).
if lt_event IS NOT INITIAL.
    if lt_event->event_name = htmlb_events=>radiobutton.
       case lt_event->event_id.
        when 'control_id_link'.
          schalter = ' '..
        when 'control_id_unlink'.
          schalter = '1'.
       endcase.
    endif.
endif.
There is an example of how to use it and read it in the DO_HANDLE_EVENT you then just have to pass the variable around (in this example the variable name is schalter and is defined as char1 in the class)

Assigning values to a javascript variable

Hi,
Using request dispatcher, i'm forwarding the control to a html from a servlet like this(obj.forward(/index.html?field1=value1&field2=value2).
In the receiving end, ie., in the html i would like to assign those 2 field1,field2 values to a javascript variables. Javascript located in the index.html.
I don't know how to do this.
Pls any one help me to get of this pblm
Thanks in Advance
Kannan.T

Hi thanks for ur reply,
You r telling while forwarding a request from one
servlet to another servlet, we can't add query
string(requestparameters). But then how come this
code is working?
RequestDispatcher
rdis=getServletContext().getRequestDispatcher("/MyServ
let?type=normal");
rdis.forward(req,res);Well I owe an apology here - I was not completely correct. I have tested and found that you can indeed add parameters that way. The catch is that these parameters are nested to that forwarded /included resource. It is not available in the original jsp or to some other resource included from the original jsp unless ofcourse you add the parameter again.
>
please give me a solution.
Like this i have to forward my request (with
querystring) to a html page.
That htmlpage should receive parameters and assign
the values to a javascript variables.
how can i achieve this.
thanks in advance.My original reply stands.
You cannot do that in a html page. You have to have a jsp that generates the html.
ram.

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.

Passving javascript variable Values to java variable

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