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    copied!<p>Maven allows you to define properties in the project's POM. You can do this using a POM file similar to the following:</p> <pre><code>&lt;project&gt; ... &lt;properties&gt; &lt;server.url&gt;http://localhost:8080/manager/html&lt;/server.url&gt; &lt;/properties&gt; ... &lt;build&gt; &lt;plugins&gt; &lt;plugin&gt; ... &lt;configuration&gt; &lt;url&gt;${server.url}&lt;/url&gt; &lt;server&gt;tomcat&lt;/server&gt; &lt;/configuration&gt; ... &lt;/plugin&gt; &lt;/plugins&gt; &lt;/build&gt; &lt;/project&gt; </code></pre> <p>You can avoid specifying the property within the <code>properties</code> tag, and pass the value from the command line as:</p> <pre><code>mvn -Dserver.url=http://localhost:8080/manager/html some_maven_goal </code></pre> <p>Now, if you don't want to specify them from the command line and if you need to further isolate these properties from the project POM, into a properties file, then you'll need to use the <a href="http://mojo.codehaus.org/properties-maven-plugin/">Properties Maven plugin</a>, and run it's <code>read-project-properties</code> goal in the <a href="http://mojo.codehaus.org/properties-maven-plugin/usage.html">initialize phase of the Maven lifecycle</a>. The example from the plugin page is reproduced here:</p> <pre><code>&lt;project&gt; &lt;build&gt; &lt;plugins&gt; &lt;plugin&gt; &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt; &lt;artifactId&gt;properties-maven-plugin&lt;/artifactId&gt; &lt;version&gt;1.0-alpha-2&lt;/version&gt; &lt;executions&gt; &lt;!-- Associate the read-project-properties goal with the initialize phase, to read the properties file. --&gt; &lt;execution&gt; &lt;phase&gt;initialize&lt;/phase&gt; &lt;goals&gt; &lt;goal&gt;read-project-properties&lt;/goal&gt; &lt;/goals&gt; &lt;configuration&gt; &lt;files&gt; &lt;file&gt;etc/config/dev.properties&lt;/file&gt; &lt;/files&gt; &lt;/configuration&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; &lt;/plugins&gt; &lt;/build&gt; &lt;/project&gt; </code></pre>
 

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