how to load an external log4j2.xml when running a standalone application?

[LV XIAOYI]

Hi all,


I have an executable jar, and I run it with this command:


java -jar .\my.jar


if  log42j.xml in my.jar, it is working,  if log42.xml out of   my.jar, it is 
not working.


I try  the “-Dlog4j.configurationFile”  to load log4j2.xml like this:


java -Dlog4j.configurationFile=.\log4j2.xml -jar .\ubbp-scheduled-1.0.2.jar


then it shows erros:


ERROR: cannot find or load the main class  .configurationFile=.\log4j2.xml.


it seems that the -D option cannot apply to the command: java -jar.


So, is there anyway to load an external log4j2.xml when running a standalone 
application?