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To clear/delete your local maven repository cache, simply delete the . m2/repository folder.
You can find your installed JARs and dependencies in your local repository. By default, you can find it here: Windows: C:\Users\USERNAME\. m2\repository.
In this case you can perform mvn initialize and jar will be installed in local maven repo.
Although deleting files manually works, there is an official way of removing dependencies of your project from your local (cache) repository and optionally re-resolving them from remote repositories.
The goal purge-local-repository, on the standard Maven dependency plugin, will remove the locally installed dependencies of this project from your cache. Optionally, you may re-resolve them from the remote repositories at the same time.
This should be used as part of a project phase because it applies to the dependencies for the containing project. Also transitive dependencies will be purged (locally) as well, by default.
If you want to explicitly remove a single artifact from the cache, use purge-local-repository with the manualInclude parameter. For example, from the command line:
mvn dependency:purge-local-repository -DmanualInclude="groupId:artifactId, ..."
The documentation implies that this does not remove transitive dependencies by default. If you are running with a non-standard cache location, or on multiple platforms, these are more reliable than deleting files "by hand".
The full documentation is in the maven-dependency-plugin spec.
Note: Older versions of the maven dependency plugin had a manual-purge-local-repository goal, which is now (version 2.8) implied by the use of manualInclude. The documentation for manualIncludes (with an s) should be read as well.
While there is a maven command you can execute to do this, it's easier to just delete the files manually from the repository.
Like this on windows Documents and Settings\your username\.m2 or $HOME/.m2 on Linux
At least on the current maven version you need to add the switch -DreResolve=false if you intend to remove the dependencies from your local repo without re-downloading them.
mvn dependency:purge-local-repository -DreResolve=false
removes the dependencies without downloading them again.
Delete every things (jar, pom.xml, etc) under your local ~/.m2/repository/phonegap/1.1.0/ directory if you are using a linux OS.
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