You’re on the right track with your pom.xml, but the issue is that you have the <shadedArtifactAttached> option set to true. This tells Maven to generate a separate shaded JAR instead of replacing the default JAR.
How to Fix It
To ensure that only one fat JAR is created (without an extra assignment2-1.0-SNAPSHOT.jar), modify your maven-shade-plugin configuration like this:
Fixed pom.xml
<build>
<finalName>assignment2</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.10.1</version>
<configuration>
<source>17</source>
<target>17</target>
</configuration>
</plugin>
<!-- Use the Maven Shade Plugin for creating a fat JAR -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
<shadedArtifactAttached>false</shadedArtifactAttached>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>org.example.Main</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>Key Fixes
- Set
<shadedArtifactAttached>false</shadedArtifactAttached>
- This prevents Maven from generating a separate shaded JAR (
assignment2-1.0-SNAPSHOT-shaded.jar) alongside the regular one. Instead, it replaces the default JAR with the fat JAR.
- Removed
<shadedArtifactClassifier>all</shadedArtifactClassifier>
- Since we don’t want two different JARs, removing this ensures that only one final JAR is built.
Build Your JAR Again
After making these changes, run:
mvn clean packageThis should create only one JAR:
target/assignment2.jarNow, you can test your program with:
java -jar target/assignment2.jar PDF sample.csvThis should work as expected! Let me know if you need further clarifications.
