Munish Gogna has been a software developer since 2006. His languages and technologies include: Java, J2EE, SQL, Spring, Hibernate as well as basic shell scripting (Unix flavors). He is currently working at a swiss private bank in Singapore. Munish has posted 6 posts at DZone. View Full User Profile

Maven - Creating a Jar From Contents of Another Jar File

01.02.2011
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Recently I came across a situation where I had to create a jar file with similar contents as of some other available jar. As using maven we cannot copy one jar file within another and also I didn't want to reinvent the wheel again so here is how I achieved the same.

Let's say there is an artifact 'sandeep-ejb-client' (some client ejb jar which has some dependency on some other artifacts say log4j and junit)
What I am interested is in creating a new jar file that has all the ejb client classes without including dependencies of 'sandeep-ejb-client'.

Here is the POM file to achieve the same:

<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

<modelVersion>4.0.0</modelVersion>
<groupId>com.test.gognamunish</groupId>
<artifactId>Test</artifactId>
<version>1_0_0</version>
<name>Test JAR</name>
<packaging>jar</packaging>
<build>
<plugins>
<plugin>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>${project.artifactId}-fetch-deps</id>
<phase>generate-sources</phase>
<goals>
<goal>unpack-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.outputDirectory}</outputDirectory>
<stripVersion>true</stripVersion>
<excludeTransitive>true</excludeTransitive>
<excludeArtifactIds>log4j,junit</excludeArtifactIds>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>

<dependencies>
<dependency>
<groupId>com.ejb.sandeepkadyan</groupId>
<artifactId>sandeep-ejb-client</artifactId>
<version>1_0_0</version>
</dependency>
</dependencies>

</project>

That's All, Simple? If anyone has got better approach please feel free to discuss !!!

From http://gognamunish.blogspot.com/2011/01/maven-creating-jar-from-contents-of.html

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