I am running Websphere Liberty 8.5. My application reads some files from the file system that are obtained via the Java CLASSPATH and I can't seem to find a way to append a directory from the file system to the CLASSPATH Liberty reads from. I've tried manually changing JAVA_CMD and JAVA_DEBUG but none of them take.
Does anyone know how this is possible?
It is not possible to modify the JVM application classpath (normally specified via the -classpath JVM argument or the CLASSPATH environment variable). I would recommend using a <library> to give your applications visibility to the resources. If you need a directory, you should use <library><folder dir="..."/></library>.
(As an aside, modifying the wlp/bin scripts or setting those "internal" script variables is not a supported external.)
ANOTHER WARNING! It only reads JAR files! I had the same issue with endless frustration. Even if you use the <library><folder dir="..."/></library> method above, it will only read jar files from the classpath. I had a bunch of properties files that I read from the classpath in JBOSS, WebSphere (full), and Glassfish, but the same method doesn't work for Websphere Liberty. What I ended up doing is the above, and putting my properties files all in a .jar file. Very annoying but a work-around, in case you need to read non-jar files.
来源：https://stackoverflow.com/questions/23658494/websphere-liberty-8-5-setting-java-classpath