Retrieving Source JARs from Maven Repositories
When working with Maven repositories, one may encounter the need to access the source JARs of dependencies. While the presence of source JARs in repositories is not guaranteed, there are methods to facilitate their acquisition.
Maven Dependency Plugin
The Maven Dependency Plugin provides a solution for retrieving source code and Javadocs for dependencies. To obtain the source JARs, execute the following command:
mvn dependency:sources
Using this command, Maven will attempt to download the source code for dependencies specified in the project's POM file.
Retrieving Javadocs
In addition to source code, Javadocs can also be obtained using the Dependency Plugin:
mvn dependency:resolve -Dclassifier=javadoc
This command will attempt to download Javadocs for the dependencies.
Limitations
It's important to note that the availability of source JARs and Javadocs depends on the packaging efforts of library maintainers. Some libraries may not provide these resources, so the specified commands may not always succeed.
Excluding/Including Artifacts
To optimize the process when working with numerous dependencies, specific artifacts can be excluded or included using the following formats:
mvn dependency:sources -DexcludeArtifactIds=artifact1,artifact2 mvn dependency:sources -DincludeArtifactIds=guava,commons-lang
By specifying artifact IDs, only the source JARs for the selected dependencies will be retrieved, reducing the download time and file size.
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