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    <p>Here is the important fact from <a href="http://www.sonatype.com/books/mvnref-book/reference/assemblies-sect-as-depend.html" rel="nofollow noreferrer">Maven: The Complete Reference's Assemblies Chapter Section 8.3.2</a>:</p> <blockquote> <p>When you generate assemblies as part of your normal build process, those assembly archives will be attached to your main project’s artifact. This means they will be installed and deployed alongside the main artifact, and are then resolvable in much the same way. Each assembly artifact is given the same basic coordinates (groupId, artifactId, and version) as the main project. However, these artifacts are attachments, which in Maven means they are derivative works based on some aspect of the main project build. To provide a couple of examples, source assemblies contain the raw inputs for the project build, and jar-with-dependencies assemblies contain the project’s classes plus its dependencies. Attached artifacts are allowed to circumvent the Maven requirement of one project, one artifact precisely because of this derivative quality.</p> <p>Since assemblies are (normally) attached artifacts, each must have a classifier to distinguish it from the main artifact, in addition to the normal artifact coordinates. By default, the classifier is the same as the assembly descriptor’s identifier. When using the built-in assembly descriptors, as above, the assembly descriptor’s identifier is generally also the same as the identifier used in the descriptorRef for that type of assembly.</p> </blockquote> <p>It is important to understand that while most Maven projects only generate a single artifact it is possible to generate more than one and use the classifier coordinate to associate these artifacts with the same GAV coordinate. In your case, you'll want to attach an assembly plugin's "single" goal using something similar to this:</p> <pre><code> &lt;plugin&gt; &lt;artifactId&gt;maven-assembly-plugin&lt;/artifactId&gt; &lt;version&gt;2.2-beta-2&lt;/version&gt; &lt;dependencies&gt; &lt;dependency&gt; &lt;groupId&gt;org.sonatype.mavenbook.assemblies&lt;/groupId&gt; &lt;artifactId&gt;web-fragment-descriptor&lt;/artifactId&gt; &lt;version&gt;1.0-SNAPSHOT&lt;/version&gt; &lt;/dependency&gt; &lt;/dependencies&gt; &lt;executions&gt; &lt;execution&gt; &lt;id&gt;assemble&lt;/id&gt; &lt;phase&gt;package&lt;/phase&gt; &lt;goals&gt; &lt;goal&gt;single&lt;/goal&gt; &lt;/goals&gt; &lt;configuration&gt; &lt;descriptorRefs&gt; &lt;descriptorRef&gt;web-fragment&lt;/descriptorRef&gt; &lt;/descriptorRefs&gt; &lt;/configuration&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; </code></pre> <p>You can attach as many of these executions as you wish, but once you have more than one execution for a particular plugin, each execution will require a unique "id" element. The "single" goal in the Maven Assembly plugin does the same thing that that the "assembly" goal does except it was designed to be bound to the lifecycle.</p> <p>The other part of you question is about excluding specific resources from a JAR, you can accomplish this by <a href="http://maven.apache.org/plugins/maven-resources-plugin/examples/include-exclude.html" rel="nofollow noreferrer">excluding resources in your POM</a>.</p>
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    1. POdo not pack specified resources in jar
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    1. USTim O'Brien
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