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The first step is to ask Maven to generate the Eclipse control files ({{.classpath}} and {{.project}}) for us:

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$ mvn eclipse:eclipse -DdownloadSources=true
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'eclipse'.
[INFO] org.apache.maven.plugins: checking for updates from apache-snapshots
[INFO] org.codehaus.mojo: checking for updates from apache-snapshots
[INFO] artifact org.apache.maven.plugins:maven-eclipse-plugin: checking for updates from apache-snapshots
[INFO] snapshot org.apache.maven.plugins:maven-eclipse-plugin:2.9-SNAPSHOT: checking for updates from apache-snapshots
Downloading: http://repository.apache.org/snapshots//org/apache/maven/plugins/maven-eclipse-plugin/2.9-SNAPSHOT/maven-eclipse-plugin-2.9-20101117.070458-148.pom
11K downloaded  (maven-eclipse-plugin-2.9-20101117.070458-148.pom)
Downloading: http://repository.apache.org/snapshots//org/apache/maven/plugins/maven-eclipse-plugin/2.9-SNAPSHOT/maven-eclipse-plugin-2.9-20101117.070458-148.jar
194K downloaded  (maven-eclipse-plugin-2.9-20101117.070458-148.jar)
[INFO] ------------------------------------------------------------------------
[INFO] Building tutorial1 Tapestry 5 Application
[INFO]    task-segment: [eclipse:eclipse]
[INFO] ------------------------------------------------------------------------
[INFO] Preparing eclipse:eclipse
[INFO] No goals needed for project - skipping
[INFO] [eclipse:eclipse {execution: default-cli}]
[INFO] Using Eclipse Workspace: /Users/Howard/Documents/workspace
[INFO] Adding default classpath container: org.eclipse.jdt.launching.JRE_CONTAINER
[INFO] Wrote settings to /Users/Howard/Documents/workspace/tutorial1/.settings/org.eclipse.jdt.core.prefs
[INFO] Wrote Eclipse project for "tutorial1" to /Users/Howard/Documents/workspace/tutorial1.
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5 seconds
[INFO] Finished at: Wed Nov 17 17:13:11 PST 2010
[INFO] Final Memory: 21M/81M
[INFO] ------------------------------------------------------------------------
~/Documents/workspace/tutorial1
$ 
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At this point, Maven has created the Eclipse {{.project}} and {{.classpath}} files, and we can import the project.

Launch Eclipse and switch over to the Java Perspective.

Right click inside the Package Explorer view and select *Import ...*


!eclipse-java-persp.png|align=center,thumbnail!


Choose the "existing projects" option:

!eclipse-import.png|align=center,thumbnail!

Now select the folder created by Maven:

!eclipse-import-folder.png|align=center,thumbnail!

When you click the Finish button, the project will be imported into the Eclipse workspace.


!eclipse-project-errors.png|align=center,thumbnail!

However; there are many errors.  Maven expects that you will configure a classpath variable, {{M2_REPO}}, that points at your local repository; a directory in your home directory that stores all those downloaded JARs and other files.  Open Eclipse's preferences panel and navigate to *Java > Build Path > Classpath Variables*:

!eclipse-classpath-vars.png|align=center,thumbnail!

Click the *New* button, and enter the new variable (you'll have to adjust this for your operating system and local paths):

!eclipse-new-var.png|align=center,thumbnail!

Eclipse will ask to perform a clean build, and the errors will be gone once it has done so.


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