log4j and Web. XML Configuration Webapprootkey issues __web

When deploying two or more projects under Tomcat, it is best to define the Webapprootkey parameter in the Web. xml file, which, if undefined, defaults to "Webapp.root", as follows: <!--application path--<con Text-param> <param-name>webAppRootKey</param-name> <param-value>webapp.root</p Aram-value> </context-param>

Best newspaper The parameter values for each item are different to avoid conflicting items

Severity: Exception sending context initialized event to listener instance of class Org.springframework.web.util.Log4jConfigLis Tener
Java.lang.IllegalStateException:Web App root system property already set to different value: ' Webapp.root ' = [C:\Program Files (x86) \apache software Foundation\tomcat 6.0\webapps\drmproject\] instead of [C:\Program Files (x86) \apache Software Foundation\tomcat 6.0\webapps\drmsn\]-Choose unique values for the ' Webapprootkey ' Context-param in your WEB.XM L files!

For multiple projects to configure the Webapprootkey, here is to let log can write to the corresponding project root directory, such as I configured the Webapprootkey of the two projects for

XML code <!--application Path--<context-param> <param-name>webAppRootKey</param-name> <param-value>webapp.root1</param-value> </context-param> [XML] view plain copy < ;! --Application path--<context-param> <param-name>webAppRootKey</param-name> <par Am-value>webapp.root2</param-value> </context-param>

So there will be no conflict.

Once defined, the absolute path to root is written to the system variable when the Web container is started.

You can then use ${webname.root} in the log4j configuration file to represent the absolute path to the Web directory and to store the log file in WebApp.

Original address: http://blog.csdn.net/arvin_qx/article/details/6829873