How to handle dynamically created checkboxes in JSP???

Question

Hello everybody,
In a JSP page I would like to create checkbox dynamically on every
result line (detail line), then check in some of them and finally pass the checked lines to a JSP bean which will handle them on a submit button press.
The problem are:
- how to index every checkbox in jsp result line in jsp page in order to avoid solutions like this:
<input type=checkbox" name="value1">
<input type=checkbox" name="value2">
etc
- how to read every checkbox to find the checked ones
Is there anobody who has any experience from case like this?
Please, help me.
Best regards,
Danny

Answer 1

Hi, first off, no need to determine what has been checked or not. If the checkbox is checked, on the post, the value will be submitted as part of the request. If the checkbox is not checked, it will not be submitted (it's value will be null). Depending on what you need, I have approached this a number of different ways. One way is to name all checkboxes the same name. If you need to distinguish between two rows in the form, then in the value field for the checkbox, use some type of distinguishing factor, for example,
<input type=checkbox name=chkName value="1:abc">
<input type=checkbox name=chkName value="1:def">
Now, you only have to make one call on the Servlet/JSP receiving the form post, request.getParameterValues("chkName") which will return an array of the non-null Strings that were checked.