Custom JSP taglib lets you dump the output on the system console. In other words tag debug lets you automatically add System.out.println() calls for the existing JSP chunks. For example:
 

Tags are:

debug

Body tag executes own body and prints the output on the system console. Parameters are:

1) console Optional parameter. Possible values are true or false. If this value is true than tag will print own body on the system console. Default values is true.
2) screen Optional parameter. Possible values are true or false. If this value is true than tag will output own body. Default values is true.
3) cond Optional parameter. Describes a boolean value this processing depends on. If this value is false tag simply outputs own body. Default value is true
 

for downloading:

 Library: debugtag.jar     Description: taglib.tld

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See also Coldtags suite - the largest collection of custom JSP tags.

• Comment taglib
• Void taglib