See this page for more examples and advanced configuration
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Parameters
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Extending the Interceptor
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Examples
Example action mapping:
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Notice the interceptor configuration in the preceding example.
Example JSP form tags:
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Example Action class:
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Setting parameters example:
<interceptor-ref name="fileUpload">
<param name="allowedTypes">
image/png,image/gif,image/jpeg
</param>
</interceptor-ref>
This part is optional and would be done in place of the <interceptor-ref name="fileUpload"/> line in the action mapping example above.