Solved

How to get selected data from a select box in a JSP?

Posted on 2004-08-17
8
617 Views
Last Modified: 2008-01-09
Hi there,

I know this is a simple question to you. However, it is not to me as I already send half day on it without lucky.

I have a simple JSP file that populates a select box containing several strings, and a push button OK. I am wondering how to get the selected data from the select box, pass the data to a mission (I already know how to do this), and redirect to another JSP when the push button is pressed.

I found some samples using JavaScript. However, I don’t know how to use it with JSP and I think Java code in the JSP can do the same job.

Could anyone here please help me with this or points me a sample resource?

Thank you in advance,

Anlee
0
Comment
Question by:Anlee
  • 4
  • 3
8 Comments
 
LVL 3

Expert Comment

by:w0lver
ID: 11825961
just send select box values to another .jsp page?

So:
    <form action="process.jsp" method="post">
          <SELECT NAME="mylist">
                    <OPTION VALUE="m1">Cape Fear
                    <OPTION VALUE="m2">The Good, the Bad and the Ugly
                    <OPTION VALUE="m3">The Omen
                    <OPTION VALUE="m4">The Godfather
                    <OPTION VALUE="m5">Forrest Gump
          </SELECT>
           <input type="submit" value="Send Data">
     </form>

and in process.jsp

     <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
       <html>
        <head>
                 <title>Process.jsp</title>
        </head>
       <body>
       You selected:<c:out value="${param.mylist}">
        </body>
       </html>
0
 

Author Comment

by:Anlee
ID: 11826604
Thanks for the quick response.

I must get the data from the select box(es) in this JSP and validate them, and then send them (with other data) to another JSP. In the other words, I should have fully control to the data. Thus your solution is not applicable in mu case. Any other idea?

Anlee
0
 
LVL 11

Expert Comment

by:sompol_kiatkamolchai
ID: 11826899
Or you try this

main.html
======
<html>  
  <form action="process.jsp" method="post">
          <SELECT NAME="mylist">
                    <OPTION VALUE="m1">Cape Fear
                    <OPTION VALUE="m2">The Good, the Bad and the Ugly
                    <OPTION VALUE="m3">The Omen
                    <OPTION VALUE="m4">The Godfather
                    <OPTION VALUE="m5">Forrest Gump
          </SELECT>
          <SELECT NAME="mylist2">
                    <OPTION VALUE="m1">Cape Fear
                    <OPTION VALUE="m2">The Good, the Bad and the Ugly
                    <OPTION VALUE="m3">The Omen
                    <OPTION VALUE="m4">The Godfather
                    <OPTION VALUE="m5">Forrest Gump
          </SELECT>
           <input type="submit" value="Send Data">
     </form>
</html>

process.jsp
========
<%
String mylist1 = request.getParameter("mylist1");
String mylist2 = request.getParameter("mylist2");
//do validate mylist1, mylist2
// if everything ok, send them(with other data) to another JSP
String otherData = "abc";
request.setAttribute("other1", otherData);
RequestDispatcher rd = request.getRequestDispatcher("another.jsp");
rd.forward(request, response);
%>

another.jsp
========
<%
String mylist1 = request.getParameter("mylist1");
String mylist2 = request.getParameter("mylist2");
String otherData = request.getParameter("other1");
%>
<html>
<%=mylist1%>
<%=mylist2%>
<%=otherData%>
</html>

Hope this help
0
ScreenConnect 6.0 Free Trial

Want empowering updates? You're in the right place! Discover new features in ScreenConnect 6.0, based on partner feedback, to keep you business operating smoothly and optimally (the way it should be). Explore all of the extras and enhancements for yourself!

 

Author Comment

by:Anlee
ID: 11827119
Your solution is saying that in order to get the selected data from the select boxes, I have to go to another JSP. Is it true? Is there another solution that gets the selected data RIGHT in the current JSP?

Anlee
0
 

Author Comment

by:Anlee
ID: 11827139
Your solution is great if the number of select boxes is fixed. However, in my case, the number of the select boxes is dynamic, it can easily be determined in the current JSP, and be difficult in the another JSP. That is why I am asking the solution.

Anlee
0
 
LVL 11

Expert Comment

by:sompol_kiatkamolchai
ID: 11827373
You can submit data to current jsp

process.jsp
========
<%
String mylist1 = request.getParameter("mylist1");
String mylist2 = request.getParameter("mylist2");
//do validate mylist1, mylist2
// if everything ok, send them(with other data) to another JSP
String otherData = "abc";
request.setAttribute("other1", otherData);
RequestDispatcher rd = request.getRequestDispatcher("another.jsp");
rd.forward(request, response);
%>
<html>  
  <form action="process.jsp" method="post">
          <SELECT NAME="mylist">
                    <OPTION VALUE="m1">Cape Fear
                    <OPTION VALUE="m2">The Good, the Bad and the Ugly
                    <OPTION VALUE="m3">The Omen
                    <OPTION VALUE="m4">The Godfather
                    <OPTION VALUE="m5">Forrest Gump
          </SELECT>
          <SELECT NAME="mylist2">
                    <OPTION VALUE="m1">Cape Fear
                    <OPTION VALUE="m2">The Good, the Bad and the Ugly
                    <OPTION VALUE="m3">The Omen
                    <OPTION VALUE="m4">The Godfather
                    <OPTION VALUE="m5">Forrest Gump
          </SELECT>
           <input type="submit" value="Send Data">
     </form>
</html>
0
 
LVL 11

Accepted Solution

by:
sompol_kiatkamolchai earned 125 total points
ID: 11827404
And for dynamic select box, try this example and apply to your work.
Tip:Enumeration is and utility in java that can keep objects and provide api for common iterate those objects.
process.jsp
=======
<%@ page import="java.util.*"%>
<%
Enumeration enum = request.getParameterNames();
while(enum.hasMoreElements()) {
  String param = (String)enum.nextElement();
  String paramValue = request.getParameter(param);
  out.println(param + "=" + paramValue);
}
%>
<html>
  <form action="process.jsp" method="post">
<%
for(int i=0; i<5; i++) {
%>
            <SELECT NAME="mylist<%=i%>">
                    <OPTION VALUE="m1">Cape Fear
                    <OPTION VALUE="m2">The Good, the Bad and the Ugly
                    <OPTION VALUE="m3">The Omen
                    <OPTION VALUE="m4">The Godfather
                    <OPTION VALUE="m5">Forrest Gump
          </SELECT>
<%
}
%>
  <input type="submit" value="Submit">
  </form>
</html>
0
 

Author Comment

by:Anlee
ID: 11840163
All your samples are working great. Thank you very much!

Anlee
0

Featured Post

Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
grep code 4 183
HTML5 vs JSP - REST based application development 4 1,071
Spring MVC - sending raw charset to backend 3 202
JavaScript parse form with colon separated values 2 77
In this article we will learn how to backup a VMware farm using Nakivo Backup & Replication. In this tutorial we will install the software on a Windows 2012 R2 Server.
Color can increase conversions, create feelings of warmth or even incite people to get behind a cause. If you want your website to really impact site visitors, then it is vital to consider the impact color has on them.
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question