问题
I'm trying to know whether it's possible to export/copy dependencies of a project managed using Maven while maintaining the folder structure that is adopted in the local repository.
The root of my need is that I have amassed through almost ten years a lot of artifacts in my local repository (~8GB). I am no longer working on those old projects from previous assignments that drew most of the artifacts in and now, I need to move just what is needed for one single project (~650MB of artifacts) to a different computer. I can't just set the other computer to download artifacts again because many of these artifacts were retrieved from a local Nexus proxy in previous assignments. Moreover, I don't have the source code for these artifacts so I can't just install them.
dependency:copy-dependencies doesn't do the trick because all artifacts are simply dumped in a single folder, instead of having say .m2\repository\mysql\mysql-connector-java\5.1.38\mysql-connector-java-5.1.38.jar
I believe my question can also be rephrased as “How can I extract from my local Maven repository a subset of the repository that is related to only one specific project?”
回答1:
You can actually use the Maven Dependency Plugin and its copy-dependencies goal, as you mentioned.
What you actually missed is its useRepositoryLayout option
Place each artifact in the same directory layout as a default repository.
example: /outputDirectory/junit/junit/3.8.1/junit-3.8.1.jar.
- Type: boolean.
- Since: 2.0-alpha-2.
- Required: No.
- User Property: mdep.useRepositoryLayout.
- Default: false.
You could hence execute - as an example - the following:
mvn dependency:copy-dependencies -Dmdep.useRepositoryLayout=true \
-DoutputDirectory=.m2/repository
回答2:
If you missing some dependency, then download that dependencies from other source and paste it in your .m2(maven local repository ) folder.
来源：https://stackoverflow.com/questions/35999109/export-maven-dependencies-and-maintain-repository-folder-structure