NoClassDefFoundError as I run a Maven packaged JAR file

I am using Maven to compile and package a Java application from the command line:

mvn clean
mvn compile
mvn package

These commands run without a problem. But when I try to run the generated JAR file

java -jar target/JarFile.jar

I get the following error:

Error: Unable to initialize main class com.company.Main
Caused by: java.lang.NoClassDefFoundError: com/google/api/client/json/JsonFactory

Which is a class from an external dependency. These dependencies are also managed by Maven (i.e., I am not supplying them locally, but listing them in my POM file.) Since I am able to run the application inside the IDE, I assume I am missing a step to make the dependencies available to the JAR file. Here is my POM file:

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <groupId>test-maven-project</groupId>
    <artifactId>test</artifactId>
    <version>1.0</version>
    
    <dependencies>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.1</version>
        </dependency>
        <dependency>
            <groupId>com.google.oauth-client</groupId>
            <artifactId>google-oauth-client</artifactId>
            <version>1.30.6</version>
        </dependency>
        <dependency>
            <groupId>com.google.http-client</groupId>
            <artifactId>google-http-client</artifactId>
            <version>1.34.2</version>
        </dependency>
        <dependency>
            <groupId>com.google.api-client</groupId>
            <artifactId>google-api-client</artifactId>
            <version>1.30.9</version>
        </dependency>
        <dependency>
            <groupId>com.google.http-client</groupId>
            <artifactId>google-http-client-jackson2</artifactId>
            <version>1.34.2</version>
        </dependency>
        <dependency>
            <groupId>com.google.apis</groupId>
            <artifactId>google-api-services-customsearch</artifactId>
            <version>v1-rev20200401-1.30.9</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <!-- Build an executable JAR -->
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>3.1.0</version>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <classpathPrefix>lib/</classpathPrefix>
                            <mainClass>com.company.Main</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Could you point me in the right direction so that the dependencies are accessible at runtime?

To run your jar from commandline, you must either explicitly specify the classpath on the command line or build an executable jar:

https://stackoverflow.com/q/574594/927493

BTW: mvn package already executes mvn compile, so you need not call mvn compile explicitly.

Use this in your pom.xml and rebuild your project.

<dependency>
<groupId>com.google.api.client</groupId>
<artifactId>google-api-client-json</artifactId>
<version>1.1.0-alpha</version>
</dependency>