Maven - built-in jar files into target jar file

In this short article, we would like to show how to built-in imported *.jar files into output *.jar file in Java Maven Project.

Quick solution (set includeSystemScope to true for spring-boot-maven-plugin):

<plugin>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-maven-plugin</artifactId>
	<version>2.4.3</version>
	<configuration>
		<includeSystemScope>true</includeSystemScope>
	</configuration>
</plugin>

Note: go to this article to know how to include *.jar files from file system into the project.

Practical example

In this section, *.jar files are located in lib/ directory located in the project (on the same level where *.pom is placed).

Project structure:

/C/
 |
 +-- my-project/
      |
      +-- lib/
      |    |
      |    +-- my.jar
      |
      +-- src/
      |   |
      |   +-- Program.java
      |
      +-- pom.xml

pom.xml 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>

	<groupId>my-project</groupId>
	<artifactId>my-project</artifactId>
	<version>1.0.0</version>

	<name>my-project</name>
	<packaging>jar</packaging>

	...

	<dependencies>

		...

		<dependency>
			<groupId>my-jar</groupId>
			<artifactId>my-jar</artifactId>
			<version>1.0.0</version>
			<scope>system</scope>
			<systemPath>${pom.basedir}/lib/my.jar</systemPath>
		</dependency>

        ...

    </dependencies>

	<build>
		<finalName>my-project</finalName>
		<plugins>

            ...

			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<version>2.4.3</version>
				<configuration>
					<includeSystemScope>true</includeSystemScope>
				</configuration>
			</plugin>

            ...

		</plugins>
	</build>

</project>