View a dependency tree in Maven?

Question

I'd like to make sure I'm not including duplicate libraries in my Maven project. I'm pulling in quite a few dependencies from a few different repositories including main, Spring's repo, and JBoss' repository. How can I see a graph of the dependencies so I can make sure I'm not depending on multiple versions of a single library?

It would be kind of a bummer if I was including something like org.springframework:spring-core:3.0.1.RELEASE and org.springframework:org.springframework.spring-core:3.0.5.RELEASE which actually do show up as different dependencies, as weird as it sounds, because Spring's repository names things weirdly. What can I do to make sure I don't have duplicate dependencies?

score 42 · Accepted Answer · edited May 23 '17 at 12:09

42

The dependency:tree maven plugin should do what you want and show the tree.

Alternatively force Maven2 to copy dependencies into target/lib to copy the the artifacts in the target/lib directory which should also show duplicates but you would still need to grep all the POMs in the ~/.m2/repository to see which library is pulling in which version manually and that would be time consuming for large local repositories.

edited May 23 '17 at 12:09

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answered Jul 22 '11 at 22:49

andyb

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Exactly what I needed. You, sir, are not lacking in winningness. – Naftuli Kay Jul 22 '11 at 23:03

score 0 · Answer 2 · answered Apr 14 '15 at 17:40

Duplicate libraries can be a problem, but duplicate classes can exist even if no libraries are duplicated. JBoss Tattletale can analyze a set of jar files and produce a report which lists all duplicated classes. There’s a Maven plugin for running the report - see http://docs.jboss.org/tattletale/userguide/1.2/en-US/html/maven.html

score 0 · Answer 3 · answered Aug 27 '15 at 15:15

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If you'd like to get a graphical, searchable representation of the dependency tree (including all modules from your project, transitive dependencies and eviction information), check out UpdateImpact: https://app.updateimpact.com (free service).

Using the search, you can find out how many times a given library is imported, by what modules and in which versions, as well as verify if older versions of a library are evicted by newer ones.

Disclaimer: I'm one of the developers of the site

answered Aug 27 '15 at 15:15

adamw

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Stop spamming/planing to promote product. I see your ad atleast in every question. – Balaji Boggaram Ramanarayan Aug 19 '16 at 22:01
The service is free, so it's no more of an ad than other pointers to sites. And I think there's a total of 2 questions on the subject, so hardly "every" :) – adamw Aug 22 '16 at 07:38

View a dependency tree in Maven?

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