Passing values to jsp from html..

Hi all,
I have a jsp containing a selection list and need to pass the value to the java segment of the jsp. When reserching this, I've found some info where an html page was created, an initial jsp was saving the info (or bean was used) and then a third jsp displayed the data (using buttons). This is too many steps and I'm needing a way for the same jsp to display containing the selected option (simulating a refresh with the post when the drop down list is used). Is redirecting while setting and getting attributes all at once feasible/possible or is there a better direction or work around for this?
Thanks in advance,
Geoff-

I would think submitting the page to itself, and setting hidden fields to signal that it is a resubmission, may be the way to go. If the new information being displayed is minimal, JavaScript may also work, by setting up an empty <div> or <span> and setting the innerHTML or innerText properties. The advantage of the JavaScript solution is it would be quicker, having the client do all the processing, but it also browser dependant.

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Pass data to JSP from HTML?

I can pass the data in a HTML form without problem if the form is in the same jsp file. I have no problem to pass data from one jsp file to another one. But when the jsp file has to take the data passed from calling HTML file and has to receive the data from the same jsp file, then the data from other HTML file will be null the first time runing the code, then second time will be passed right. If I shut down computer run the code again, same problem until the second time. Please tell me why if any of you know!

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<html> <head> <title>CTI</title>
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<%
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%>
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Passing values to JSP using HTML

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Any suggestions

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Passing values between jsp and php

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Passing values to javascript from database

hi friends,
I have to fetch values from the database and pass the values to the java script variable.
I tried this, but is not working. When i place the script inside the java, it isnt working. Iam passing value to this script variable as argument to a function. This is my code:
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
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%>
<script>
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<%
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Keep this in mind: JSP is source generation software.
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insertArrayHere = insertArrayHere.substring(0, insertArrayHere.length() - 1); Now I'm sure that's not exactly what you want because it looks like you got some crazyness going on in your logic. I don't know how you can query the using values from the database. Anyhow it poses as a good example of how to apply the concept of the two technologies. (Also, why are you doing a System.out from JSP? You should be calling log() if you want console output.) The whole idea is that JSP can NOT talk directly to Javascript. It can only generate Javascript dynamically before it is received by the browser.

Passing vectors into JSP from Servlet and passing data back to Servlet

I have been building an MVC application.
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What I am having trouble with is a new JSP I have designed; this will
display the data that is actioned by the FORM action. This is actioned
based on the Search criteria entered by the user. Based on this a further vector is populated and brought back to the JSP as a vector
and this is rendered via the TABLE tag. Again this works fine.
Against each of the rows displayed, I have a print checkbox which can be checked by the user. On checking the records they want to print, they should then hint a Print button which should go back to the Servlet and print the data. THIS IS WHERE I HAVE THE PROBLEM. On going
back to the servlet the checkbox values are not displayed, rather
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Thanks for this.
Just to clarify I am not using Struts.
What I am having difficulties with is the fact that:
I can't get the checked values back to the Servlet - they keep the values they have in the bean - so as part of instantiating the bean class I set the value of the item to 'off'. The user will then check
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the vector to the JSP.
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Enumeration paramNames = request.getParameterNames();
String param = null;
while (paramNames.hasMoreElements())
param=(String)paramNames.nextElement();
System.out.println("parameter " + param + " is " +
request.getParameter(param));
what comes back is the valus of 'off' as opposed to 'on'.
The other thing is that 'request.getParameterNames()' only works
with the first record in the vector, i.e. it doesn't fetch any other
records that are rendered in the <TABLE> tag.
In desperation is there anybody out there who can help me.
Thanks
Chris
I am going to assume you are using a MVC framework
like Struts or very similar (I am assuming that from
the language you are using).
When the servlet passes the vector back to the JSP
page and you render the HTML that is passed back the
client your Vector is gone. The Vector is not
available at the HTML level that is being viewed at
the browser.
When the user selects the checkboxes and submits the
page (by clicking the print button) the controller
servlet (called ActionServlet in Struts, yours maybe
called something else) forwards the request to the
appropriate JavaBean and Servlet to process the
request. Either the JavaBean has to recreate the
Vector (not recommended) or the processing Servlet can
(better). You can do this by recreating the Vector
from scratch for the HttpRequest parameters or, at the
time of the initial request, saving Vector to a
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Either way you have to work with
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Passing values between jsp pages

Hi all,
I am a newbie to jsp. I am trying to pass value from one jsp to another.
Let me post the code here and make my point clear. I have 3 jsp pages and am trying to get the value into my 3rd page that was in the first page.
This is my Test.jsp page:
<%@page contentType="text/html"%>
<html>
<head><title>Test JSP Page</title></head>
<body>
<%-- <jsp:useBean id="beanInstanceName" scope="session" class="package.class" /> --%>
<%-- <jsp:getProperty name="beanInstanceName" property="propertyName" /> --%>
Testing.. JSP Page
<FORM action='Response.jsp' method="POST">
<input type='Text' name='get_name'>
<input type="submit" value="Click Me">
</FORM>
</body>
</html>
This is my response.jsp page:
<%@page contentType="text/html"%>
<%@page import = "sun.jdbc.rowset.CachedRowSet" %>
<html>
<head><title>Response Page</title></head>
<body>
<%-- <jsp:useBean id="beanInstanceName" scope="session" class="package.class" /> --%>
<%-- <jsp:getProperty name="beanInstanceName" property="propertyName" /> --%>
Thank you... <%=request.getParameter("get_name") %>
// I want to pass this get_name to my next page, but since request.getParameter returns an object and not a string, how will I capture the value and pass it to my next page.
</body>
</html>
The 3rd jsp page is:
<%@page contentType="text/html"%>
<html>
<head><title>JSP Page</title></head>
<body>
// I am trying to get the value of the name here in this page.
<%-- <jsp:useBean id="beanInstanceName" scope="session" class="package.class" /> --%>
<%-- <jsp:getProperty name="beanInstanceName" property="propertyName" /> --%>
</body>
</html>
Your help is appreciated.
Thanks

Hi,
Thanks for the reply, it works. I was wondering whether this is an efficient way of doing this. What I want to do further is to setup a connection to a database and use the value I got from my previous page to query the DB and get the results and display.
I have see some code in the java website and a lot of people do by writting a bean /class(believe bean is just a class) and then importing it and do the things that way. I have good knowledge of OO and Java as a language and would definitely love to do it this way.
What i think i am missing is the basic idea to doing this way. So if you could let me know how to do this using java classes I would really appreciate it. If its too much to explain can u point to some good source(URL's) that explain's this. I have searched on this and all i find is code with no good explaination.
Thanks a lot

Pass value between JSP pages

I would like to pass values between pages.
I don't want showing up on the url. Ex: some.jsp?param=value
I don't feel it's safe.
It's not coming from form either....
How can I hide the value and pass it to next page?
I want to pass the value when the user click on a hyperlink
Thanks In Advance.
Message was edited by:
Theepan

Client side information is never safe no matter what you do. If the values don't end up in the url, they are always present SOMEWHERE in the html content.
If you don't want the values to end up in the url, rework the page so it DOES do a post form submit. You could turn the hyperlink into a javascript call that submits the form for you.

Passing value to jsp page by clicking a hyperlink

I have a hyperlink in a jsp page1. The hyperlink is for another jsp page2. I have a string value in JSP page1, which I want to pass to jsp page2 when user clicks the hyperlink. Can anyone tell me what will be the suitable way to do this? Thanks.

here's the source to two very simple jsps that do what you want..
<HTML>
<HEAD>
<TITLE>
ForwardValue
</TITLE>
</HEAD>
<BODY>
<H1>
Go To GetValue.jsp
</H1>
</BODY>
</HTML>
<HTML>
<HEAD>
<TITLE>
GetValue
</TITLE>
</HEAD>
<BODY>
<H1>
<%= request.getParameter("value") %>
</H1>
</BODY>
</HTML>

Passing values in jsp.

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<TABLE width="100%">
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<TD BGCOLOR=666699 ALIGN=CENTER><b>Catagory</b></TD>
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<% String[] names = {"CRISPY BRAISED SQUAB","SOY SAUCE SQUAB","PAN FRIED MINCED SQUAB WITH LETTUCE"};
String[] SKUs = {"Squab marinated in five spice seasoning and roasted to prefection.","Whole squab braised with supreme soy sauce.","Stir fried minced squab with ground water chestnuts, Chinese sausage, Chinese mushrooms and served with fresh lettuce cups and hoi sin sauce." };
String[] Cnames ={"��N��F","��o��F","��F�]"};
double[] prices = {12.00, 12.00, 12.00};
String[] numbername ={"1","1","1"};
String numval[] = new String[3];
for(int j=0; j<names.length; j++){ %>
<TR><TD BGCOLOR=666699 ALIGN=CENTER><b><%=j+1%>.</b></TD>
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<TD BGCOLOR=AAAAAA ALIGN=CENTER><font class="description"><%=SKUs[j]%></font></TD>
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<TD BGCOLOR=AAAAAA ALIGN=CENTER><b>$<%=prices[j]%>0</b></TD>
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<br><a href="squab1.jsp?name=<%=names[j%">&cname=<%=Cnames[j]%>&sku=<%=SKUs[j]%>&price=<%=prices[j]%>&numname=<%=numbername[j]%>">
Add</A></TD></TR>
<% } %>
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          <TD BGCOLOR=666699 ALIGN=CENTER colspan="2"> </TD>
     <TD BGCOLOR=666699 ALIGN=CENTER> </TD>
     <TD BGCOLOR=666699 ALIGN=CENTER> </TD>
          <TD BGCOLOR=666699 ALIGN=CENTER> </TD>
          <TD BGCOLOR=666699 ALIGN=CENTER> </TD>
          <TD BGCOLOR=666699 ALIGN=CENTER> </TD>
</TR>
</TABLE>
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<%
String name = request.getParameter("name");
String cname = request.getParameter("cname");
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if(name.equals("emptyCart")){
shoppingCart.emptyCart();
} else {
String sku = request.getParameter("sku");
double price = Double.parseDouble(request.getParameter("price"));
     int qty = Integer.parseInt(request.getParameter( "numname"));
     shoppingCart.setQty(qty);
ShoppingCarts1 newItem = new ShoppingCarts1(sku, name,cname, "Squab", price);
shoppingCart.addItem(newItem);
}} %>
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Here is the code that I am using. The only problem is that when I entered the quantity of the order , it did not take my entered number instead the static integer I assigned earlier; String[] numbername ={"1","1","1"}; located in the middle of this code. See I have to assign all quantity to 1 to all the products initially. But If some one want more than one, that person has to type the number on the text box. How can I retrieve that number instead of one. I generate all the numbers inside of the for loop. Please take a closer look at the middle part of the assigned code. Very urgent, thanks ahead.
</a>

Servlet passing values to JSP and ClasscastException

I am using weblogic 5.1 to run my Servlets.
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          C
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          at
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          ava:143)
          at
          com.logistics.optistopasp.servlet.AccountSelectServlet.doPost(AccountSelectServ
          let.java, Compiled Code)
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          et.java:35)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
          at
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java,
          C
          ompiled Code)
          at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.j
          ava, Compiled Code)
          at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.j
          ava, Compiled Code)
          at
          weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextMan
          ager.java, Compiled Code)
          at
          weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java,
          Compile
          d Code)
          at
          weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
          Compiled Code
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java,
          Compiled Code)
          Can anybody please Help!!!!.
          Thanks
          Pankaj


Only can confirm your finding - the jsp is using a different class loader to the servlet that originally instantiated the object. There's the rub. I haven't figured out yet how to fix that. I can get the classloader but don't know how to get the runtime to use that class loader to perform cast.

Servlet passing Values to JSP

I want to know when I forward from a servlet to a JSP how do I pass
          values especially Java Objects (Sometimes Objects of User written Java
          classes).
          Uptil now I have been putting all values in the session from where the
          JSP picks them up, but somehow I have a feeling that this is not the
          right way.
          Suppose my servlet is forwarding to a jsp . What should it do in case an
          exception happens in the servlet and wants to forward it to the jsp.
          Putting the Exception object in the session is an alternative but I
          wonder that is the best approach.
          If someone knows a better way od doing it, please help.
          Pankaj


You could probably use setAttribute
          ..before forwarding the control to JSP.
          req.setAttribute("message", "Hello, world");
          ServletContext app = getServletContext();
          RequestDispatcher disp;
          disp = app.getRequestDispatcher("Dispmessage.jsp");
          Cheers,
          Naggi
          pankaj wrote:
          > I want to know when I forward from a servlet to a JSP how do I pass
          > values especially Java Objects (Sometimes Objects of User written Java
          > classes).
          > Uptil now I have been putting all values in the session from where the
          > JSP picks them up, but somehow I have a feeling that this is not the
          > right way.
          > Suppose my servlet is forwarding to a jsp . What should it do in case an
          > exception happens in the servlet and wants to forward it to the jsp.
          > Putting the Exception object in the session is an alternative but I
          > wonder that is the best approach.
          > If someone knows a better way od doing it, please help.
          >
          > Pankaj

Passing values to Jframe from JApplet

Hi All,
i need to open a frame when someone clicks on some particular part of an applet. also, i need to pass some values to that frame based on the region selected.
Previusly i m doing it through showDocument method which calls a JSP which in turn calls the applet that i m trying to change as a frame now.
Help please.
Liza

just to make things more clearer... i was passing values as querystring to JSP which passes them to an applet through parameter tags.
Liza

Passing values between JSP and Bean

I am trying to validate a date entered by the user on a form. I need to do an "alert" when the user enters a date outside of the valid range depending on a value entered in a drop down.
Am doing this in checkform function. Here is what I want to do:
1. Send the the value from the drop down and the date to bean to do the calculations. Call the EJB function from checkform.
2. Get a string values back into the jsp from the bean
3. Blow an error to the user to enter a valid date.
Any help in this case would be greatly appreciated.
Thanks.

I only see some design requirements.
What's the exact coding question? Where are you stucking while coding those requirements accordingly?

Passing values to jsp from html..

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