Build a JAR of JARs with Maven2

If you want to create a ZIP or JAR made up of other artifacts, one option is using the maven-dependency-plugin. Here's a quick how-to:

1. Explicitly list the artifacts you want included.

<dependencies>
  ...
  <dependency>
    <groupId>javax.sip</groupId>
    <artifactId>jain-sip-ri</artifactId>
    <version>1.2-2007-07-25</version>
  </dependency>
  ...
</dependencies>

2. Configure the plugin as needed

<plugins>
  <plugin>
    <artifactId>maven-dependency-plugin</artifactId>
    <executions>
      <execution>
        <id>${project.artifactId}-fetch-deps</id>
        <phase>generate-sources</phase>
        <goals><goal>copy-dependencies</goal></goals>
        <configuration>
          <outputDirectory>${project.build.outputDirectory}</outputDirectory>
          <stripVersion>true</stripVersion>
          <excludeTransitive>true</excludeTransitive>
          <excludeArtifactIds>junit</excludeArtifactIds>
        </configuration>
      </execution>
    </executions>
  </plugin>
</plugins>