Useful Maven Commands

Overview

Previous post I have described some basic concepts of Apache Maven. Here I have included some useful commands need for day to day maven operations.

Maven Commands

Maven Commands

Maven command	Usage
mvn --version	Get the  maven version of your computer.
mvn archetype:generate	Create a maven project based on 40 + maven templates. You can specify the template by entering the number after this. eg. 18 for simple Java web application project template
mvn archetype:generate -DarchetypeGroupId= org.apache.maven.archetypes -DgroupId=com.mycompany.app \ -DartifactId=my-app	Create default maven project with my-app directory and pom.xml
mvn compile	Compile your project sources.
mvn test	Executes their unit tests.
mvn package	Package will compile your code and also package it. For example, if your pom says the project is a jar, it will create a jar for you when you package it and put it somewhere in the target directory (by default).
mvn install	Compile and package, but it will also put the package in your local repository. This will make it so other projects can refer to it and grab it from your local repository.
mvn deploy	Copies the final package to the remote repository for sharing with other developers and projects.
mvn clean	Removes files generated at build-time in a project's directory (target by default). It will also remove caches of previous
mvn clean install	First clean  and then install. You can combine some operations like that based on the each operations.
mvn idea:idea	Generate settings and files needed for IDEA maven project. This will remove the errors with imports in your java project
mvn eclipse:eclipse	Same thing for ECLIPSE maven project.
MAVEN_OPTS=”-Xms1024m -Xmx4096m -XX:MaxPermSize=1024m”	Avoid the Maven OutOfMemoryError

Maven Command Line Options

We can add additional arguments to basic operations. maven eg.mvn install -Dmaven.test.skip=true

Maven Command Line Options

Maven argument	Usage
mvn install -o	Compiles, tests, packages and installs the jar or war file in offline mode
-Dmaven.test.skip=true	Skip tests would not even compile the tests
-Dmaven.test.failure.ignore= true	Ignore any failures occurred during test execution
-Dmaven.test.error.ignore=true	Ignore any errors occurred during test execution
-DskipTests	Compile the test classes but skip test execution entirely
--fail-fast	The default behavior - whenever a module build fails, stop the overall build immediately
--fail-at-end	If a particular module build fails, continue the rest of the reactor and report all failed modules at the end instead
--resume-from	Resumes a reactor the specified project (e.g. when it fails in the middle)