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Editorial Team
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Asked: 2026-05-15T16:24:27+00:00

I’m new to Servlet containers and have created a web application using Tomcat 6.0.26.

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I’m new to Servlet containers and have created a web application using Tomcat 6.0.26. I have ‘TODO: log’ scattered throughout my code. I see there exists:

myServlet.getServletContext().log()

which appears to write to a file prefixed with ‘localhost’ in the Tomcat ‘/logs’ directory. I don’t need any advanced logging capability, but I’d like a date, time, message and stack trace at minimum. In addition, I’ve created some classes used by my various servlets that need logging capabilities as well. Do I need to inject a SevletContext into these classes so they can log?

It appears that log4j from Apache is a popular logging package, but I’m not sure if it worth the trouble of setting it up.

What would be the recommended way of logging for my needs?

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1 Answer

  1. Editorial Team

    In addition to all the stuff BalusC has mentioned above, in your java code (servlets/beans/whatever) just import and initialize the Logger

    package my.app;

import org.apache.log4j.Logger;

private static Logger logger = Logger.getLogger("classname");
// use any string you want

    Then at any logging point you can log at various levels like

    if (logger.isDebugEnabled()) {
            logger.debug("Some log at this point");
        }

...

logger.info("Some info message here");

    These will appear in the logs depending on whether you set DEBUG or INFO in the log4j.propeties

    Take a look at the examples on http://www.java2s.com/Code/Java/Language-Basics/Examplelog4jConfigurationFile.htm and all the Related examples in the same article

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