cheat sheets.

To build and thus create the project's artifact (war, jar, etc):
mvn package

To clean all previous build files:
mvn clean

To clean all previous build files and then build:
mvn clean package

If you want to do the above but in a "off-line" mode
mvn -o clean package

To clean all previous build files, then build, then install in the local
repository:
mvn clean package install

---------------------------------

Installing Artifact in Local Repository
mvn clean install

To build the package file (jar, war, etc) allowing test failure:
mvn -Dmaven.test.failure.ignore=true package

To generate Eclipse project descriptor after configuring the dependencies in
pom.xml:
mvn eclipse:eclipse

To clean previous generated Eclipse support files and then generate Eclipse
project descriptor after configuring the dependencies in pom.xml:
mvn eclipse:clean eclipse:eclipse

To generate the project's development support site
mvn site

To generate site documentation without running the tests (handy while updating
the APTs):
mvn -Dmaven.test.skip=true clean site

To generate javadoc
mvn javadoc:javadoc

To generate javadoc stuffed into a jar file
mvn javadoc:jar

To create a new non web app Java project (artifact is jar):
mvn archetype:create -DgroupId=com.mycompany.app -DartifactId=my-app

To create a new web app Java project (artifact is war):
mvn archetype:create -DgroupId=com.mycompany.app -DartifactId=my-webapp
-DarchetypeArtifactId=maven-archetype-webapp

To check the version of Maven:
mvn --version

To run unit tests:
mvn test

To distribute the source code:
mvn assembly:assembly -DdescriptorId=src

To install a jar file on local repo:
mvn install:install-file -Dfile=foo.jar -DgroupId=bar -Dversion=x.y
-Dpackaging=jar -DartifactId=blah

To install the oracle ojdbc14_g.jar file on local repo:
Optionally Download the Oracle JDBC driver from
http://www.oracle.com/technology/software/tech/java/sqlj_jdbc/index.html
Q:
cd C:\some\path\to\file\oracle
mvn install:install-file -DgroupId=com.oracle -DartifactId=ojdbc14_g
-Dversion=10.2.0.1.0 -Dpackaging=jar -Dfile=ojdbc14_g.jar
Then add a dependency in the pom.xml file similar to the following
 <project>
 <dependencies>
        <dependency>
                <groupId>com.oracle</groupId>
                <artifactId>ojdbc14_g</artifactId>
                <version>10.2.0.1.0</version>
        </dependency>
 </dependencies>
 </project>

Installing 3rdParty jar in local repository:
mvn install:install-file -Dfile=foo.jar -DgroupId=org.foosoft -DartifactId=foo
-Dversion=1.2.3 -Dpackaging=jar

Setting Compiler Version
 <project>
   <build>
      <plugins>
         <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
               <source>1.6</source>
               <target>1.6</target>
            </configuration>
         </plugin>
      </plugins>
   </build>
 </project>

Standard Project Structure
/new-app/pom.xml		maven2 project file
/new-app/src/			Sources
/new-app/src/main/java/		Java source tree
/new-app/src/test/java/		Java unit tests
/new-app/src/main/resources/	Java classpath resources
/new-app/src/test/resources/	Resources for unit-tests
/new-app/target/classes/	compiles classes
/new-app/target/test-classes/	compiles test classes
/new-app/target/dots		other plugins' output
/newwebapp/src/main/webapp	root of webapp


Generic Create Commands using Archetypes
Create a jar artifact project
mvn archetype:create -DgroupId=com.mycompany.app -DartifactId=my-app

Create a web app, war artifact project
mvn archetype:create -DgroupId=com.mycompany.app -DartifactId=my-webapp
-DarchetypeArtifactId=maven-archetype-webapp

Add documentation source
mvn archetype:create -DarchetypeGroupId=org.apache.maven.archetypes
-DarchetypeArtifactId=maven-archetype-site -DgroupId=com.mycompany.app
-DartifactId=my-app-site

Create a Groovy based project, groovy-jar artifact project
mvn archetype:create \
    -DarchetypeGroupId=org.codehaus.mojo.groovy \
    -DarchetypeArtifactId=groovy-maven-archetype \
    -DgroupId=com.mycompany.app \
    -DpackageName=com.mycompany.app.mygroovymodule \
    -DartifactId=my-groovy-module

Fake Specific Create Commands

create a jar artifact project
mvn archetype:create -DgroupId=com.mycompany.app -DartifactId=my-app

Create a web app, war artifact project
mvn archetype:create -DgroupId=com.mycompany.app -DartifactId=my-app
-DarchetypeArtifactId=maven-archetype-webapp

Add documentation source
mvn archetype:create -DarchetypeGroupId=org.apache.maven.archetypes
-DarchetypeArtifactId=maven-archetype-site -DgroupId=com.mycompany.app
-DartifactId=my-app
or cd into project dir
mvn archetype:create -DarchetypeGroupId=org.apache.maven.archetypes
-DarchetypeArtifactId=maven-archetype-site

Creating a war project
http://maven.apache.org/guides/mini/guide-webapp.html


(based on http://nbtconsulting.com/cheat-sheets/maven-cheat-sheet.html)