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The Struts 2 conversion error interceptor is a subclass of the XWork 2 conversion error interceptor.

From the Javadocs of the XWork 2 interceptor:

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From the Javadocs of the Struts 2 interceptor:

This interceptor extends ConversionErrorInterceptor but only adds conversion errors from the ActionContext to the field errors of the action if the field value is not null, "", or {""} (a size 1 String array with only an empty String). See ConversionErrorInterceptor for more information, as well as the Type Conversion documentation.


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    Extending the Interceptor

    There are no known extension points for this interceptor.