How to build jar from a project that uses maven jar?

Question

Java

All the best!
There is a small Java class that uses 1 Java library (jar file).
Locally, everything is good, everything works, the Maven build is also done, everything is OK, BUT it does not find the library
Run: java -jar Ver-1.0.jar
Gives an error:

Exception in thread "main" java.lang.NoClassDefFoundError:

I scoffed at pom.xml as best I could, the latest version has come to what:

<?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>
    <groupId>Ver</groupId>
    <artifactId>Ver</artifactId>
    <version>1.0</version>

    <dependencies>
        <dependency>
            <groupId>libs</groupId>
            <artifactId>lib-1</artifactId>
            <version>1.0</version>
            <scope>system</scope>
            <systemPath>
                ${project.basedir}/src/main/java/lib/lib-1.jar
            </systemPath>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <mainClass>pc.Start</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-install-plugin</artifactId>
                <version>2.5</version>
                <executions>
                    <execution>
                        <id>lib-1</id>
                        <phase>initialize</phase>
                        <goals>
                            <goal>install-file</goal>
                        </goals>
                        <configuration>
                            <groupId>libs</groupId>
                            <artifactId>lib-1</artifactId>
                            <version>1.0</version>
                            <packaging>jar</packaging>
                            <file>${project.basedir}/src/main/java/lib/lib-1.jar</file>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

Answer 1

The easiest way out of this situation is to build a fat jar that includes the classes of both the program itself and all its dependencies. You can do this by expanding pom.xml a bit:

<project ... >
  ...
  <build>
    <plugins>
      ...
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>3.1.0</version>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
        <executions>
          <execution>
            <id>make-assembly</id>
            <phase>package</phase>
            <goals>
              <goal>single</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>

Now, when building, it will create two jar files - a regular one with a view name <имя>-<версия>.jarand a thick one with a view name. <имя>-<версия>-jar-with-dependencies.jar
The second way is to ship the application along with dependency jar files. To do this, first, ensure that the Class-Path: section is added to the manifest. You can do this by adding to pom.xml

<project ... >
  ...
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <version>3.1.0</version>
        <configuration>
          <archive>
            <manifest>
              <addClasspath>true</addClasspath>
            </manifest>
          </archive>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

Secondly, after the build is completed, you need to run the command mvn dependency:copy-dependencies, by which Maven will copy all the dependencies to target/dependency. After that, you can copy the program jar file and the dependency jar files into the same working directory and run the program.
PS Scripts are not written in Java.