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url tag

 
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does the below tag mean, that I am trying to use session through url rewriting

<s:url id="url" action="download"/><s:a href="%{url}">Download image file.</s:a>
 
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While it is true that Struts tags involving a URL do perform URL rewriting, the main purpose of the code you've shown us is to create and use a URL for a specific action. If you're using the default suffix of ".action", the URL would translate to something like:

"http://myserver.com/myApp/action.action"

It's considered a better practice to use this method rather than specifying the ".action" because even though the default suffix is .action, you could set it to something else. The code you have shown us will work regardless of what the suffix is.
 
I guess I've been abducted by space aliens. So unprofessional. They tried to probe me with this tiny ad:
a bit of art, as a gift, the permaculture playing cards
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