How to remove blank lines from the JSP output

A source of annoyance with the JSP output, where all the JSP directives are replaced with blank lines in the final output has been addressed in JSP 2.1. Now if you want to get rid of all the blank lines in your JSP output, simply add the line <%@page trimDirectiveWhitespaces="true"%> to the top of your JSP. I wish this was the default.

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This entry was posted on August 24, 2007 at 2:53 pm and is filed under jsp, Programming. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

8 Responses to “How to remove blank lines from the JSP output”

Vignesh Ravi Says:
November 13, 2009 at 11:49 am | Reply
Thanks a lot. I was stuck with exactly this problem and the solution given here worked wonderfully well. Thanks again Shahram.
- Shahram Javey Says:
  November 13, 2009 at 7:21 pm | Reply
  You’re welcome Vignesh.
Florian Hüter Says:
March 18, 2010 at 9:23 am | Reply
Thanks for this little hint. I’ve already known the option to suppress blank lines per web.xml but in my special case I needed it for only one JSP file.

But one question remained: Eclipse marks this attribute with an “undefined attribute name” warning but in my webapp it works exactly as expected. Any idea?

Thanks again, Florian
Jay Says:
November 3, 2010 at 6:58 pm | Reply
I’ve been looking into how to remove the warning in eclipse as well,but so far no luck. Let me know if you figure this out.
manoj Says:
February 4, 2011 at 2:43 pm | Reply
thanks a lot.
- Shahram Javey Says:
  February 4, 2011 at 5:59 pm | Reply
  You are welcome.
Vasyl Khrystyuk Says:
January 3, 2012 at 1:46 pm | Reply
there is another solution.
Add this to your web.xml:

………

*.jsp
true

……………………
Vasyl Khrystyuk Says:
January 3, 2012 at 1:49 pm | Reply
you shuld configurate your filter becouse it didn’t work as expect

n o t e 1 9 . c o m