Maven

• Build management and dependencies
• Avoid having to manually add jar files to classpath (build path)
• Local cache is stored at ~/.m2/repository/

Standard Directory Structure

• src/main/java: source code
• src/main/resources: properties and config files
• src/main/webapp: JSP files and web config files. Other web assets (images, css, js)
• src/test: unit tests
• target: compiled code

pom.xml

• Project Object Model (POM file)
• Metadata: name, version, output (jar,war)
• Dependencies: list of dependencies to download
• Plugins: additional tasks to run (e.g., generate test reports)

<project ...>
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.hvitoi</groupId>
  <artifactId>awesome-app</artifactId>
  <version>1.0-SNAPSHOT</version>
  <name>aop-demo</name>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>11</maven.compiler.source>
    <maven.compiler.target>11</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency> <!-- GAV: GroupID, ArtifactID, Version -->
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.3.9</version> <!-- version is optional but highly recommended -->
    </dependency>
  </dependencies>

  <build>
    <pluginManagement>
      <plugins>
        ...
      </plugins>
    </pluginManagement>
  </build>

</project>

• To install a maven dependency in maven, go to the MVN Repository and search for the dependency

Archetypes

• Boilerplate for new projects
• org.apachage.maven.archetypes.maven-archetype-quickstart
• org.apachage.maven.archetypes.maven-archetype-webapp

Private Repositories

• Maven server tools
• Archiva (Apache)
• Artifactory (JFrog)
• Nexus (Sonatype)

<repositories>
  <repository>
    <id>confluent</id>
    <url>https://packages.confluent.io/maven/</url>
  </repository>
</repositories>

Command Line Interface

mvn clean
mvn package
mvn install # install the current project into the ~/.m2 folder
mvn test # test reports are stored at "target/surefire-reports" folder
mvn -B -DskipTests clean package