Place minified files into jar - maven

Question

I will use the maven dependency com.samaxes.maven#minify-maven-plugin to minify my frontend project. This frontend- project is packaged into a jar (java archive) - so I have no war file because I use Spring boot.
With the configuration at the bottom *.min.js and *.min.css files are generated but they are not pacakged into jar file. I have read some threads and I have tried something but with no success: in the JAR file there are still the unminified css and js files.
Does anyone have any hint what I can do. I have a lot of css and js files in my project in different folder structures and the minified files should be placed in the same place like the unminified files are.
<build>
<plugins>
<plugin>
<groupId>com.samaxes.maven</groupId>
<artifactId>minify-maven-plugin</artifactId>
<version>1.7.4</version>
<executions>
<execution>
<id>default-minify</id>
<phase>package</phase>
<configuration>
<charset>UTF-8</charset>
<skipMerge>true</skipMerge>
<nosuffix>true</nosuffix>
<closureCompilationLevel>WHITESPACE_ONLY</closureCompilationLevel>
<webappSourceDir>src/main/resources</webappSourceDir>
<cssSourceDir>./</cssSourceDir>
<cssTargetDir>./minified</cssTargetDir>
<cssSourceIncludes>
<cssSourceInclude>**/*.css</cssSourceInclude>
</cssSourceIncludes>
<cssSourceExcludes>
<cssSourceExclude>**/*.min.css</cssSourceExclude>
</cssSourceExcludes>
<jsSourceIncludes>
<jsSourceInclude>**/*.js</jsSourceInclude>
</jsSourceIncludes>
<jsSourceExcludes>
<jsSourceExclude>**/*.min.js</jsSourceExclude>
</jsSourceExcludes>
<jsEngine>CLOSURE</jsEngine>
</configuration>
<goals>
<goal>minify</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
[EDIT]
I have edit the Maven plugin in this way.
I really have to use src/main/recoures - it a specification at our project.
My problem now is that the files in the different folders unter the under the main folder path public/app are minified BUT the folders with the minified files are at same level than my public folder is.
So I would need something like this:
<webappTargetDir>**public/app/**${project.build.outputDirectory}</webappTargetDir>
Is there a possibility to do it like this?
<build>
<plugins>
<plugin>
<groupId>com.samaxes.maven</groupId>
<artifactId>minify-maven-plugin</artifactId>
<version>1.7.4</version>
<executions>
<execution>
<id>default-minify</id>
<phase>prepare-package</phase><!-- When omitted defaults to 'process-resources' -->
<configuration>
<charset>UTF-8</charset>
<skipMerge>true</skipMerge>
<closureCompilationLevel>WHITESPACE_ONLY</closureCompilationLevel>
<webappSourceDir>src/main/resources/public/app</webappSourceDir>
<webappTargetDir>${project.build.outputDirectory}</webappTargetDir>
<cssSourceDir>./</cssSourceDir>
<cssSourceIncludes>
<cssSourceInclude>**/*.css</cssSourceInclude>
</cssSourceIncludes>
<jsSourceDir>./</jsSourceDir>
<jsSourceIncludes>
<jsSourceInclude>**/*.js</jsSourceInclude>
</jsSourceIncludes>
<jsEngine>CLOSURE</jsEngine>
</configuration>
<goals>
<goal>minify</goal>
</goals>
</execution>
</executions>
</plugin>
With the minify-maven-plugin configuration above I get the following folder structure at the left side but I would need the folder structure at the rigth side. Is there any possibility to do that?

Answer 1

The files are copied relatively from webappSourceDir to webappTargetDir. So if you want the structure to match, you should use similar patterns for those. Meaning, it should be
<webappSourceDir>src/main/resources</webappSourceDir>
<webappTargetDir>${project.build.outputDirectory}</webappTargetDir>
or
<webappSourceDir>src/main/resources/public/app</webappSourceDir>
<webappTargetDir>${project.build.outputDirectory}/public/app</webappTargetDir>
I've commited the working example here