Keeping Radio selection in JSP Form

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teser3@hotmail.com - 31 Oct 2007 00:25 GMT

How do I keep Radio button values and not lose them after a Form is
submitted?
I have no problem keeping text values where a form is submitted and
if
there is a validation issue with the text value it takes me back to
the Form and shows the Form text value that was submitted.
With Radio buttons it clears the Radio selection.
Please advise.

JavaBean:

public void setNotify(String n) {
notify=n;
}
public String getNotify() {
return notify;
}

Form in JSP:

<jsp:useBean id="formHandler" class="Concord.FormBean" scope="request"/

<form action="process.jsp" method=post>
....
Yes <input type="radio" name="notify" value="Yes" <jsp:getProperty
name="formHandler" property="notify" /> > <br>
No <input type="radio" name="notify" value="No" <jsp:getProperty
name="formHandler" property="notify" /> >

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Lew - 31 Oct 2007 01:10 GMT

> How do I keep Radio button values and not lose them after a Form is
> submitted?
[quoted text clipped - 4 lines]
> With Radio buttons it clears the Radio selection.
> Please advise.

First advice, and you've been around long enough to know better:
<http://www.physci.org/codes/sscce.html>

> Form in JSP:

What is the name of the JSP?

> <jsp:useBean id="formHandler" class="Concord.FormBean" scope="request"/>

Watch out for the space that used to be between the slash ('/') and the
greater-than symbol ('>'). It shouldn't be there.

> <form action="process.jsp" method=post>

Don't post to the JSP. Post to a "front-controller" servlet.

> Yes <input type="radio" name="notify" value="Yes" <jsp:getProperty
> name="formHandler" property="notify" /> > <br>
> No <input type="radio" name="notify" value="No" <jsp:getProperty
> name="formHandler" property="notify" /> >

Set the attribute 'checked="checked"' on the radio button that you want
already selected, and make the prompts labels:

<label for="notifyYes">Yes
</label><input type="radio" id="notifyYes" name="notify" value="Yes"
${checkedYes} >
<br>
<label for="notifyNo">No
</label><input type="radio" id="notifyNo" name="notify" value="No"
${checkedNo} >

where the server-side logic has set a request attribute "checkedYes" to either
"checked=\"checked\"" if "Yes" was checked, "" otherwise. Similarly it has
set "checkedNo" to "checked=\"checked\"" if "No" was checked, "" otherwise.

There are various variations possible on this. The secret is to set a string
in the selected radio button to 'checked="checked"' in only the selected
button, empty string on the others.

<http://www.w3schools.com/tags/tag_input.asp>

Signature

Lew

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Keeping Radio selection in JSP Form

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