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Struts 2 Integer Validation not working

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Experts, I am trying to add Integer validation to the my Struts 2 application.
Here is what I have done

<validator type="int">
<param name="fieldName">zipCode</param>
<message>Zip Code needs to be a valid number </message>

I have already set validate="true" in the <s:form> tag
This is successfully generating the java script code at my JSP. But when I see the generated code. The validation code for my field is hacing code

Not sure why this code is coming

if (false || false) {

Due to this it will not do validation for this field.

Any clue? Am I doing something wrong here? Please help.
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Spring Tomcat Server Java
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looks like the Struts 2 "int" type validator does the range check. It uses IntRangeFieldValidator which is checking for integer range only.

I think its still beta so they may be fixing some issues. It should be working as you are expecting but if this does not work then have a workaround by using regular expression for number validation in your case it should work fine as you have zip code which need not be checked for the range.

Here is a Example Code which demonstrate how you can use regular expression validation for number validation in Struts 2.
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