Can maven projects have multiple parents?

by

Even though maven projects have single parent, they can import any number of other pom’s like this:

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>my-shared-dependencies</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

This has two important differences compared to a parent:

  1. Plugins defined in the imported pom won’t be imported
  2. Dependencies defined in the imported pom won’t be added to the current pom, it will only import dependencies into the dependency management section

However, if your parent pom has a <dependencies> section and you want to include those into your dependencies, then you can add the parent to your <dependencies> section just like a regular dependency:

<dependency>
    <groupId>org.example</groupId>
    <artifactId>my-shared-dependencies</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</dependency>

Even though the same dependency is already imported, the version tag has to be specified again. To reduce duplication, it can be stored in a property

More Related Contents:

  1. How to read an external properties file in Maven
  2. Different dependencies for different build profiles
  3. Is it possible to create an “uber” jar containing the project classes and the project dependencies as jars with a custom manifest file?
  4. How do I get my Maven Integration tests to run
  5. Having a 3rd party jar included in Maven shaded jar without adding it to local repository
  6. Load properties file in JAR?
  7. How to update maven repository in Eclipse?
  8. Why is each public class in a separate file?
  9. What causes imported Maven project in Eclipse to use Java 1.5 instead of Java 1.6 by default and how can I ensure it doesn’t?
  10. Managing DLL dependencies with Maven
  11. Debugging in Maven?
  12. Making Maven run all tests, even when some fail
  13. Maven: How to include jars, which are not available in reps into a J2EE project?
  14. Building a runnable jar with Maven 2
  15. JUnit tests pass in Eclipse but fail in Maven Surefire
  16. Resource from src/main/resources not found after building with maven
  17. build maven project with propriatery libraries included [duplicate]
  18. “Faceted Project Problem (Java Version Mismatch)” error message
  19. maven-archetype-webapp eclipse problem
  20. Maven compilation: Failure executing javac
  21. How to configure Eclipse build path to use Maven dependencies?
  22. Maven dependency resolution (conflicted)
  23. How to reference javadocs to dependencies in Maven’s eclipse plugin when javadoc not attached to dependency
  24. Testing against Java EE 6 API
  25. What is the default annotation processors discovery process?
  26. How can I get Maven to stop attempting to check for updates for artifacts from a certain group from maven-central-repo?
  27. Is there a Maven alternative or port for the .NET world?
  28. Maven archetype for simple Servlet application
  29. Maven for other languages? [closed]
  30. Tool for creating a Java daemon service on Linux [closed]

Leave a Comment