In-depth analysis of Maven dependency tree: a guide to conflict resolution and optimization strategies

The dependency:tree command is used to view all dependencies in a project, including direct and transitive dependencies.

Maven Dependency Tree Command

mvn dependency:tree

This command generates a dependency tree that includes all direct and transitive dependencies and outputs it to the terminal.

Assuming your project's pom.xml file contains the following dependency:

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>5.2.9.RELEASE</version>
</dependency>

Running mvn dependency:tree might produce output similar to the following:

[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ my-project ---
[INFO] my-project:jar:1.0-SNAPSHOT
[INFO] +- org.springframework:spring-core:jar:5.2.9.RELEASE:compile
[INFO] |  \- org.springframework:spring-jcl:jar:5.2.9.RELEASE:compile
[INFO] \- junit:junit:jar:4.12:test

In this example, spring-core depends on spring-jcl, and my-project also directly depends on junit.

Filtering the Dependency Tree

If you want to view only specific dependencies, you can use the -Dincludes and -Dexcludes parameters to filter the dependency tree. For example, to view only spring related dependencies, you can run the following command:

mvn dependency:tree -Dincludes=org.springframework