How to build jar with external libraries folder in IDEA?

Question

Java

Hello.
Moved from Eclipse to IDEA.
I have my own home project. In Eclipse, I created jar using standard tools.
But it doesn't work in IDEA. Although I tried all the options found on the Internet.
You need to build the jar, and put the external jar libraries in the lib folder.
Create jar+lib works, but my jar doesn't see external jars.
Is there a working example on the Internet, or who has their own example - please tell me.
Both methods are of interest: using IDEA and using maven.

Answer 1

I'll try to answer in the maven part.
In my project I place libraries inside jar using Apache Maven Shade Plugin
https://maven.apache.org/plugins/maven-shade-plugin/
In pom.xml it looks like this:

<!-- Maven Shade Plugin -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>2.3</version>
                <executions>
                    <!-- Run shade goal on package phase -->
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <transformers>
                                <!-- add Main-Class to manifest file -->
                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>JCheck.App</mainClass>
                                </transformer>
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

If I understand correctly, you can place dependencies in an external folder using maven using System Dependencies
Below are two links that I came across.
https://maven.apache.org/guides/introduction/intro...
https://www.tutorialspoint.com/maven/maven_externa...

Answer 2

dunbox , thanks, but I've already tried that, but the list of libraries doesn't even get into the manifest.
Here is this part of my pom:

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>3.1.1</version>
                <configuration>
                    <archive>
                        <index>true</index>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <mainClass>mmmmm.sssssss.main.Main</mainClass>
                            <packageName>mmmmm.sssssss.main</packageName>
                            <classpathPrefix>lib/</classpathPrefix>

                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                            <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
                        </manifest>
                    </archive>

                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>3.1.1</version>
                <executions>
                    <execution>
                        <id>copy-dependencies</id>
                        <phase>prepare-package</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>

                            <outputDirectory>${project.build.directory}/lib</outputDirectory>
                            <overWriteReleases>false</overWriteReleases>
                            <overWriteSnapshots>false</overWriteSnapshots>
                            <overWriteIfNewer>true</overWriteIfNewer>

                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>


    <dependencies>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.10</version>
            <scope>system</scope>
            <systemPath>${basedir}/lib/commons-codec-1.10.jar</systemPath>
        </dependency>

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