Convert Java project to Maven project

Installing m2eclipse

(Just so you know, STS comes with this plugin already, whew!)

Select Java project, right click, maven->Enable Dependency Management.

Or you could New->Maven->Maven POM File

To create a new Maven project

New->Maven->Maven Project

You could choose which archetype you want to generate, there a lot of them!!!!

You could also run maven command in Eclipse, by using Run as, Maven Build, you could specify your goal.

Maven Archetype Plugin

mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

mvn archetype:create-from-project

http://johnjianfang.blogspot.com/2009/05/create-maven-archetype-from-existing.html

Maven Lifecycle References

http://maven.apache.org/guides/introduction/introduction-to-the-lifecycle.html#Lifecycle_Reference

Maven in 5 minutes

http://maven.apache.org/guides/getting-started/maven-in-five-minutes.html

Create maven-driven project in one command:

mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

All plugins in Maven 2.0 look much like a dependency - and in some ways they are. This plugin will be automatically downloaded and used - including a specific version if you request it (the default is to use the latest available).

Take a look at STS's "Effective POM" view, you can understand what plugin, phase, and goal.

You must specify a valid lifecycle phase, or a goal in the format plugin:goal or pluginGroupId:pluginArtifactId:pluginVersion:goal

mvn test-compile
mvn:compiler:testCompile
mvn org.apache.maven.plugins:maven-compiler-plugin:2.3.2:testCompile

Maven Setting Up

1. download the zip, unzip it into some folder, let's say C:\Applications\apache-maven-3.0.3
2. setting up variables
M2_HOME=C:\Applications\apache-maven-3.0.3
put %M2_HOME% into PATH
M2_REPO=C:\Users\Paul\.m2\repository
3. mvn -v   should work now.
4. to make sure a project maven compatible, use mvn eclipse:eclipse
5. in Eclipse, you need setup M2_REPO variable
select Window > Preferences. Select the Java > Build Path > Classpath Variables page.