This is the command line that is usefull for the connection of the jconsole on a Weblogic server 10.3.1
%JAVA_HOME%\bin\jconsole -J-Djava.class.path=%JAVA_HOME%\lib\jconsole.jar;%JAVA_HOME%\lib\tools.jar;%BEA_HOME%\server\lib\wljmxclient.jar -J-Djmx.remote.protocole.provider.pkgs=weblogic.management.remote -J-Dcom.sun.management.jmxremote
where JAVA_HOME references the jdk and BEA_HOME the installation directory of the weblogic server