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Home/ Questions/Q 6230051
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Editorial Team
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Editorial Team
Asked: May 24, 20262026-05-24T09:40:39+00:00 2026-05-24T09:40:39+00:00

I have one form containing one checkbox(not checkbox list)and one textfield. If the checkbox

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I have one form containing one checkbox(not checkbox list)and one textfield.
If the checkbox is cheked then no need to enter the value for textfield.
If the check box is not checked then I need to validate the textfield has mandatory.
How can I do using expression validator.Is this Possible in struts2.0.11.

Let me know

Thanks in advance

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  1. Editorial Team
    Editorial Team
    2026-05-24T09:40:41+00:00Added an answer on May 24, 2026 at 9:40 am

    Use fieldexpression validator. Example :

    SomeAction.java

    private SomeObject object; // with getter & setter
    private boolean doNotCheck; // with setter
    

    input.jsp

    <s:textfield name="object.field" />
    <s:checkbox name="doNotCheck" />
    <s:fielderror fieldName="object.field" />
    

    SomeAction.validation.xml

    <validators>
        <field name="object.field">
            <field-validator type="fieldexpression">
                <param name="expression">
                    <![CDATA[ isDoNotCheck() ? true : (object.field != null && !object.field.isEmpty()) ]]>
                    <!-- OR -->
                    <!-- isDoNotCheck() ? true : !object.field.isEmpty() -->
                </param>
                <message>This is a mandatory field</message>
            </field-validator>
        </field>
    </validators>
    
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