How to make JSP input checkbox checked by default?

Question

I have a checkbox in JSP, which consists of a HashMap<String, String>, e.g.,

"1", "Name"
"2", "Age"
"3", "Gender"

Now I want the first entry be checked by default, how should I write the if test code? The current code is as follows:

<input type="checkbox" name="params" value="<s:property value="#param.key"/>"
<s:iterator value="params" var="app">
<s:if test="???">
onclick="return false"
checked="checked"
</s:if>
</s:iterator>/>
&emsp;<s:property value="#param.value"/>

It’s unclear what you’re trying to do here. You should include the complete code and data. — Dave Newton, Jul 13 '21 at 12:45
The iterator has nothing with a single checkbox. If you need multiple checkboxes then you can try a `` tag, or you can try [this](https://stackoverflow.com/a/42654697/573032) solution. — Roman C, Jul 13 '21 at 18:36

score 1 · Answer 1 · answered Jul 14 '21 at 22:26

1

The <s:iterator> tag has a status attribute were you can use a variable

<s:iterator value="params" var="app" status="paramStatus">
<s:if test="#paramSatus.index == 0">
onclick="return false"
checked="checked"
</s:if>
</s:iterator>

answered Jul 14 '21 at 22:26

Roman C

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How to make JSP input checkbox checked by default?

1 Answers1