When using spring-boot-maven-plugin to package JAR for current projects, it is often necessary to add some resources and class files under non-default paths to the JAR package. The following can be configured in pom.xml

<build>
    <plugins>

        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>2.0.0.RELEASE</version>
            <configuration>
                <jvmArguments>-Dfile.encoding=UTF-8</jvmArguments>
                <mainClass>com.test.TestApplication</mainClass>
                <layout>ZIP</layout>
<!--                    <classesDirectory>target/test-classes</classesDirectory>-->
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
    <resources>
        <resource>
            <filtering>false</filtering>
            <directory>target/test-classes</directory>
            <includes>
                <include>**/*.class</include>
            </includes>
        </resource>
    </resources>
</build>

In this example, class files under target/test-classes are added to the final JAR package as well. In addition, <classes Directory> included in <configuration> is also used in the document to add resources and class files to JAR, but after trying, it doesn't work and I don't know if there is a misconfiguration.

 

Reference document

Available Plugins
Introduction to Plugin Prefix Resolution
Apache Maven Resources Plugin
Apache Maven Compiler Plugin
Spring Boot Maven Plugin