what is the right way to use log4j within jsp pages

Question

I mean, I want the logger name to reflect the source.jsp file, no matter if it is included in another file or compiled to a class or whatever.

Answer 1

Firstly, import the required package i.e.

<%@page import="org.apache.log4j.Logger"%>

then,

 <%! static Logger logger = Logger.getLogger(jsppagename_jsp.class); %>

the jsppagename_jsp may change, according to the server which you are using. And then, use anywhere inside jsp like:

<% logger.info("This is test."); %>

The IDE may show an error message at the declaration of logger object. But, don't worry, the server like tomcat will automatically create the corresponding servlet class of each jsp page inside tomcat directly itself.

Answer 2

What's wrong with:

Logger logger = Logger.getLogger( "source.jsp" );

You can prepend it with a better non-ambiguous prefix, of course. Actually, something along the lines JSPS.source.jsp is better, as you can set up logging rules for JSPS logger, that would later be applied to all sub-loggers.

Having said this, why do you need to log from JSP directly?