Useful link https://www.baeldung.com/executable-jar-with-maven#bd-thymeleaf-4

The command to create a new maven project

mvn archetype:generate -DgroupId=com.celestial -DartifactId=jaxrs_bos-example -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

Where -DartifactId=jaxrs_bos-example is the project name, maven creates a folder with this name. Replace jaxrs_bos-example with your project's name.

Where -DgroupId=com.celestial is your organisation's domain. Replace com.celestial with your organisation's domain.

Linking maven projects together - using maven modules

mvn install - will build a project, package it up according to the <packaging> element in the pom.xml and copy it into the <host user's folder>/.m2/repository/<sub folder> which is the local maven repo.

The following pom.xml files show how to link maven projects.

pom.xml

<?xml version="1.0"?>
<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>test</groupId>
  <artifactId>root</artifactId>
  <packaging>pom</packaging>
  <version>1.0-SNAPSHOT</version>
  <modules>
    <module>core</module>
    <module>source</module>
  </modules>
</project>

Now consider a small piece of code that will be used in another project

core_src_main_java_Dep.java

public class Dep {}

Here is it's pom.xml file

core_pom.xml

<?xml version="1.0"?>
<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/maven-v4_0_0.xsd">
  <parent>
    <groupId>test</groupId>
    <artifactId>root</artifactId>
  <version>1.0-SNAPSHOT</version>
  </parent>
  <modelVersion>4.0.0</modelVersion>
  <artifactId>core</artifactId>
</project>

Now consider the code that references the above code

source_src_main_java_Test.java

public class Test {
	public void a() {
		Dep d = new Dep();
	}
}

Here is its pom.xml file

source_pom.xml

<?xml version="1.0"?>
<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/maven-v4_0_0.xsd">
  <parent>
    <groupId>test</groupId>
    <artifactId>root</artifactId>
  <version>1.0-SNAPSHOT</version>
  </parent>
  <modelVersion>4.0.0</modelVersion>
  <artifactId>source</artifactId>
  <dependencies>
    <dependency>
    <groupId>test</groupId>
    <artifactId>core</artifactId>
    <version>1.0-SNAPSHOT</version>
  </dependency>
  </dependencies>
</project>

Here is my maven projects

The dependent project

Its associated pom.xml file

jaxrs_bos-example pom.xml

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.celestial</groupId>
  <artifactId>jaxrs_bos-example</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>
  <name>jaxrs_bos-example</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

The server code

Here is its associated pom.xml file

jax_rs_server-example

<?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>com.celestial</groupId>
    <artifactId>jax_rs_server-example</artifactId>
    <version>1.0</version>
    <packaging>war</packaging>

    <name>jax_rs_server-example</name>

    <properties>
        <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    
    <dependencies>
        <dependency>
            <groupId>${project.groupId}</groupId>
            <artifactId>jaxrs_bos-example</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.9</version>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-client</artifactId>
            <version>1.9</version>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-json</artifactId>
            <version>1.9</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                    <compilerArguments>
                        <endorseddirs>${endorsed.dir}</endorseddirs>
                    </compilerArguments>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.6</version>
                <executions>
                    <execution>
                        <phase>validate</phase>
                        <goals>
                            <goal>copy</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${endorsed.dir}</outputDirectory>
                            <silent>true</silent>
                            <artifactItems>
                                <artifactItem>
                                    <groupId>javax</groupId>
                                    <artifactId>javaee-endorsed-api</artifactId>
                                    <version>7.0</version>
                                    <type>jar</type>
                                </artifactItem>
                            </artifactItems>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

Here is the client project

jax_rs_client-example

<?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>com.celestial</groupId>
    <artifactId>jax_rs_client-example</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>
    <repositories>
        <repository>
            <id>unknown-jars-temp-repo</id>
            <name>A temporary repository created by NetBeans for libraries and jars it could not identify. Please replace the dependencies in this repository with correct ones and delete this repository.</name>
            <url>file:${project.basedir}/lib</url>
        </repository>
    </repositories>
    <dependencies>
        <dependency>
            <groupId>unknown.binary</groupId>
            <artifactId>javax.ws.rs-api-2.0</artifactId>
            <version>SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet</artifactId>
            <version>2.5.1</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-client</artifactId>
            <version>2.5.1</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-moxy</artifactId>
            <version>2.5.1</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-client</artifactId>
            <version>1.9</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-json</artifactId>
            <version>1.9</version>
        </dependency>
        <dependency>
            <groupId>${project.groupId}</groupId>
            <artifactId>jaxrs_bos-example</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
</project>

Possible Additional Dependencies

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.5</version>
</dependency>

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.5</version>
</dependency>

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.5</version>
</dependency>

Important

I've developed a multi-project application in Netbeans, deploying the services on a tomcat webserver. I'm not sure if it's tomcat or netbeans, but when something goes wrong (as it will do whilst in dev mode), maven has trouble deleting the lib folder (under <maven project root>/target/<build-name>/WEB-INF/) when a maven clean is invoked (it cannot remove the jersey*.jar files). Having tried multiple approaches, the only one that seem to work was shutting netbeans down, which shutdown tomcat. The lib folder could then be deleted.

Adding all dependencies into a single jar

Use the Apache Maven Shade Plugin

Adding a local jar file to a project

At the moment this isn't working as we want. The client application builds, but when it runs the dependants are not found. Tried using the Apache shade plugin and that still didn't work.

Using the following entry in the client pom.xml

<dependency>
    <groupId>com.celestial</groupId>
    <artifactId>PhoneUtilsMVN</artifactId>
    <version>1.0</version>
    <scope>system</scope>
    <systemPath>
        C:/Users/Admin/Downloads/PhoneUtilsMVN-1.0.jar
    </systemPath>
</dependency>

Specifying JDK build maven project

      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

Getting Maven to build a JAR with MainClass set

Add the following to your pom.xml to build jar without external libraries included in the build

<plugin>
   <groupId>org.apache.maven.plugins</groupId>
   <artifactId>maven-jar-plugin</artifactId>
   <version>3.2.0</version>
   <configuration>
      <archive>
         <manifest>
            <mainClass>com.celestial.AClass</mainClass>
         </manifest>
      </archive>
   </configuration>
</plugin>

OR you can use the shade plugin to build jar with external libraries included in the build

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.4.0</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <transformers>
                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>com.celestial.App</mainClass>
                                </transformer>
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

OR

    <build>  
        <plugins>
            <plugin>    
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                </configuration>   
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.4.0</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <transformers>
                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>com.lbg.coh2.App</mainClass>
                                </transformer>
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
            </plugin>    
        </plugins>
    </build>

Springboot Applications

When working with Sprinboot, use this plugin

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<executions>
					<execution>
						<goals>
							<goal>repackage</goal>
						</goals>
						<configuration>
							<classifier>spring-boot</classifier>
							<mainClass>
								com.celestial.vatcsl.VatCalculatorServiceApplication
							</mainClass>
						</configuration>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>

Latest Maven plugin that builds an executable with MainClass path

  <build>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-shade-plugin</artifactId>
          <executions>
            <execution>
              <goals>
                <goal>shade</goal>
              </goals>
              <configuration>
                <finalName>kafka_demo</finalName>
                <shadedArtifactAttached>true</shadedArtifactAttached>
                <transformers>
                  <transformer implementation=
                                       "org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                    <mainClass>org.celestial.kafka.producer.App</mainClass>
                  </transformer>
                </transformers>
              </configuration>
            </execution>
          </executions>
        </plugin>
      </plugins>
  </build>