I'm currently looking for the same.
/** Update: Forget all of those below. Just tried them, none is "production ready". **/
Until now I found the following, but havn't tested any of these yet. I will give feedback if something has satisfied my needs (maybe you will also):
- "JEExplorer", which obviously disappeared from the internet. Maybe a copy is to be found somewhere.
- JFileMan: from https://github.com/developerSid/JFileMan
- gpFinder: https://github.com/oyejorge/gpFinder, a fork of
- elFinder: https://github.com/Studio-42/elfinder (With a Java backend: https://github.com/Studio-42/elfinder-servlet)
If you have already found a tool which fits your needs let us know!