How Can I Add a JAR File as a Dependency in Maven Using a Relative Path Without a Central Repository?

Adding Dependencies to JARs via Relative Paths in Maven

In scenarios where one desires to include a proprietary JAR as a dependency in their Maven project but without adding it to a repository, a solution exists to link to the JAR via a relative path from the pom.xml file.

To achieve this, a local repository specific to the project should be utilized, avoiding the system scope, which often presents challenges. Here's how it can be implemented:

1. Define a local repository in the pom.xml file:

<repositories>
  <repository>
    <id>my-local-repo</id>
    <url>file://${project.basedir}/my-repo</url>
  </repository>
</repositories>

2. Install the third-party JAR into the local repository using the mvn install:install-file command with the localRepositoryPath parameter:

mvn org.apache.maven.plugins:maven-install-plugin:2.3.1:install-file \
                         -Dfile=<path-to-file> -DgroupId=<mygroup> \
                         -DartifactId=<myartifactid> -Dversion=<myversion> \
                         -Dpackaging=<mypackaging> -DlocalRepositoryPath=<path></path></mypackaging></myversion></myartifactid></mygroup></path-to-file>

3. Define the dependency in the pom.xml file without the system scope:

<dependency>
  <groupid>your.group.id</groupid>
  <artifactid>3rdparty</artifactid>
  <version>X.Y.Z</version>
</dependency>

This approach provides a more reliable solution compared to using the system scope, ensuring that the dependency is treated as a regular dependency, including in assembly building and other tasks.

It's important to note that the recommended solution for corporate environments remains the utilization of a corporate repository, providing centralized access and management of dependencies.

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