When using Domino Designer 8.5.3, I have a bunch of custom classes added using the Java design element. I want to use a 3rd party JAR in my custom classes in the same way you would when using external JARs in xPages SSJS, via Package Explorer:
WebContent-->WEB-INF-->lib
However my custom classes aren't picking the JAR up.
Is this a known limitation or have I got my configuration screwed up somewhere?
They are after you do:
Project -> Properties -> Java Build Path -> Libraries -> Add JARS...
update:
Frantisek Kossuth tells us about a nice shortcut in his comment:
in Package Explorer view (Java perspective, or add this view to XPages/Domino Designer perspective), simply right click JAR file and use "Build Path/Add to Build Path" menu
I had a similar problem (Accessing methods from imported jars in managed beans). It seems you need to import them in your machine/server's file system.
来源：https://stackoverflow.com/questions/14464827/are-jar-files-in-webcontent-web-inf-lib-available-to-java-design-elements-in-dom