not able to build executable jar using maven shade plugin - jar

Question

i need to check the anagram java file using the maven shade plugin and need to add the manifest and build number . i have tried below code.
<project XML="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.fresco.play</groupId>
<artifactId>maven-anagram-finder</artifactId>
<packaging>jar</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>maven-anagram-finder</name>
<url>http://maven.apache.org</url>
<!-- Insert test dependency here -->
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<configuration>
<transformers>
<transformer>
<manifestEntries>
<mainClass>com.fresco.play.Anagram</mainClass>
<Build-Number>10</Build-Number>
</manifestEntries>
</transformer>
</transformers>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
this is the error i am getting while trying to build using the jdk1.8 version. all the test cases are passing but build is failing with this error
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 48.286 s
[INFO] Finished at: 2020-06-25T09:23:24+05:30
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-shade-plugin:2.1:shade (default) on project maven-anagram-finder: Unable to parse configuration of mojo org.apache.maven.plugins:maven-shade-plugin:2.1:shade for parameter transformer: Cannot create instance of interface org.apache.maven.plugins.shade.resource.ResourceTransformer: org.apache.maven.plugins.shade.resource.ResourceTransformer.<init>() -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginConfigurationException
i have tried all the ways. but not able to resolve. could you please help on this??

Answer 1

i have resolved the issue by adding the transformer implementation. Thank you.
4.0.0
com.fresco.play
maven-anagram-finder
jar
0.0.1-SNAPSHOT
maven-anagram-finder
http://maven.apache.org
<!-- Insert test dependency here -->
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.5</version>
</dependency>
</dependencies>
<build>
<finalName>maven-anagram-finder</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.fresco.play.Anagram</mainClass>
</transformer>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<manifestEntries>
<Main-Class>com.fresco.play.Anagram</Main-Class>
<Build-Number>10</Build-Number>
</manifestEntries>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>