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    copied!<p>If you use Spring you can:</p> <p>1) create a log4j configuration file, e.g. "/WEB-INF/classes/log4j-myapp.properties" DO NOT name it "log4j.properties"</p> <p>Example:</p> <pre><code>log4j.rootLogger=ERROR, stdout, rollingFile log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - &lt;%m&gt;%n log4j.appender.rollingFile=org.apache.log4j.RollingFileAppender log4j.appender.rollingFile.File=${myWebapp-instance-root}/WEB-INF/logs/application.log log4j.appender.rollingFile.MaxFileSize=512KB log4j.appender.rollingFile.MaxBackupIndex=10 log4j.appender.rollingFile.layout=org.apache.log4j.PatternLayout log4j.appender.rollingFile.layout.ConversionPattern=%d %p [%c] - %m%n log4j.appender.rollingFile.Encoding=UTF-8 </code></pre> <p>We'll define "myWebapp-instance-root" later on point (3)</p> <p>2) Specify config location in web.xml:</p> <pre><code>&lt;context-param&gt; &lt;param-name&gt;log4jConfigLocation&lt;/param-name&gt; &lt;param-value&gt;/WEB-INF/classes/log4j-myapp.properties&lt;/param-value&gt; &lt;/context-param&gt; </code></pre> <p>3) Specify a <strong>unique</strong> variable name for your webapp's root, e.g. "myWebapp-instance-root"</p> <pre><code>&lt;context-param&gt; &lt;param-name&gt;webAppRootKey&lt;/param-name&gt; &lt;param-value&gt;myWebapp-instance-root&lt;/param-value&gt; &lt;/context-param&gt; </code></pre> <p>4) Add a Log4jConfigListener:</p> <pre><code>&lt;listener&gt; &lt;listener-class&gt;org.springframework.web.util.Log4jConfigListener&lt;/listener-class&gt; &lt;/listener&gt; </code></pre> <p>If you choose a different name, remember to change it in log4j-myapp.properties, too.</p> <p>See my article (Italian only... but it should be understandable): <a href="http://www.megadix.it/content/configurare-path-relativi-log4j-utilizzando-spring" rel="noreferrer">http://www.megadix.it/content/configurare-path-relativi-log4j-utilizzando-spring</a></p> <p><strong>UPDATE (2009/08/01)</strong> I've translated my article to English: <a href="http://www.megadix.it/node/136" rel="noreferrer">http://www.megadix.it/node/136</a></p>
 

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