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This will build, run tests, and install to the local repository
mvn clean install
This will skip compiling and running the tests
mvn clean install -Dmaven.test.skip=true
This will still compile, but not run the tests
mvn clean install -DskipTests
mvn -Dit.test=YourIntegrationTest verify
Use the Purge Local Repository Plugin.
You've might of tried to use the -U option. Beware, there are issues with -U https://issues.apache.org/jira/browse/MNG-4142
mvn dependency:tree # The verbose flag instructs the dependency tree to display conflicting # dependencies that were omitted from the resolved dependency tree. mvn dependency:tree -Dverbose -Dincludes=org.apache.* # Debug logging mvn dependency:tree -Dverbose -X
Also see this nice web UI: https://app.updateimpact.com/treeof/io.dropwizard/dropwizard-core/1.0.0
Use the Maven Versions Plugin.
Also see this article.
Use the Maven Dependency Plugin
mvn dependency:analyze -DignoreNonCompile=true
mvn eclipse:eclipse -DdownloadSources=true
mvn org.apache.maven.plugins:maven-dependency-plugin:2.1:get -Dartifact=groupId:artifactId:version -DrepoUrl=url
When you build an application, Maven will search for dependencies in the local repository. If a stable version is not found there, it will search the remote repositories (defined in settings.xml or pom.xml) to retrieve this dependency. Then, it will copy it into the local repository, to make it available for the next builds.
For example, a foo-1.0.jar library is considered as a stable version, and if Maven finds it in the local repository, it will use this one for the current build.
Now, if you need a foo-1.0-SNAPSHOT.jar library, Maven will know that this version is not stable and is subject to changes. That's why Maven will try to find a newer version in the remote repositories, even if a version of this library is found on the local repository. However, this check is made only once per day. That means that if you have a foo-1.0-20110506.110000-1.jar (i.e. this library has been generated on 2011/05/06 at 11:00:00) in your local repository, and if you run the Maven build again the same day, Maven will not check the repositories for a newer version.
Maven provides you a way to can change this update policy in your repository definition:
<repository> <id>foo-repository</id> <url>...</url> <snapshots> <enabled>true</enabled> <updatePolicy>XXX</updatePolicy> </snapshots> </repository>
A model of the settings.xml can be found here.