How to use a customized classpath? Can this classpath be generated from a command?

[xycabcd]

To avoid the complex building system of Maven that I don't need, I usually make an xml file in Maven format, and do mvn -q dependency:build-classpath -Dmdep.outputFile=/dev/stdout. To stop vscode-java from modifing build settings like source path from reading POM, this xml file is called dependencies.xml, but the extension also can't read the dependencies in it. I also can't find a way to make the extension use a specific classpath, neither manually entered nor through a command.

[xycabcd]

I found ivy being a good replacement for maven dependency:build, but there is also no ivy support in VSCode.