log4j and Web. XML Configuration Webapprootkey Issues

When deploying two or more projects under Tomcat, it is best to define the Webapprootkey parameter in the Web. xml file and, if undefined, default to "Webapp.root", as follows:

    <!--Application Path -      <Context-param>          <Param-name>Webapprootkey</Param-name>          <Param-value>Webapp.root</Param-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> 

    <!--Application Path -      <Context-param>          <Param-name>Webapprootkey</Param-name>          <Param-value>Webapp.root2</Param-value>      </Context-param>

So there will be no conflict.

After

is defined, the absolute path to root is written to the system variable when the Web Container boot .
then log4j configuration file you can use ${webname.root} to represent the absolute path to the Web directory. Store the log file in the WebApp.