Configure application server startup scripts (DB2®)
If you set the code page variable as described in Configure environment variables (DB2), complete the following task. If you did not, the following modification is not required.
Modify your startup script for Weblogic or WebSphere®, adding the following under JAVA_OPTIONS:
-Dfile.encoding=utf-8
For example:
${JAVA_HOME}/bin/java ${JAVA_VM} ${MEM_ARGS} ${JAVA_OPTIONS} 
-Dfile.encoding=utf-8 -Dweblogic.Name=${SERVER_NAME}
-Dweblogic.ProductionModeEnabled=${PRODUCTION_MODE}
-Djava.security.policy="${WL_HOME}/server/lib/weblogic.policy" weblogic.Server