Download Maven dependencies using Ant

build.xml

<project name="lib" default="download-libs" xmlns:artifact="urn:maven-artifact-ant">

    <property name="maven.ant.tasks.version" value="2.1.3"/>
    <property name="maven.ant.tasks.jar" value="maven-ant-tasks-${maven.ant.tasks.version}.jar"/>
    <property name="maven.ant.tasks.mirror"
        value="http://ftp.ps.pl/pub/apache/maven/ant-tasks/${maven.ant.tasks.version}/binaries/"/>

    <target name="download-libs" depends="-init-maven-task">
        <artifact:dependencies pathId="dependencies.classpath">
            <remoteRepository id="maven-central" url="http://repo1.maven.org/maven2/"/>

            <!-- Put dependecies here -->

            <!-- examples: -->
            <!-- <dependency groupId="org.codehaus.groovy" artifactId="groovy" version="1.7.2" /> -->
            <!-- <dependency groupId="org.ccil.cowan.tagsoup" artifactId="tagsoup" version="1.2" /> -->
        </artifact:dependencies>

        <move todir=".">
            <path refid="dependencies.classpath"/>
        </move>
    </target>

    <target name="-init-maven-task" depends="-obtain-maven-task-jar">
        <available property="maven.ant.tasks.jar.exists" file="${maven.ant.tasks.jar}"/>
        <typedef resource="org/apache/maven/artifact/ant/antlib.xml" uri="urn:maven-artifact-ant"
            classpath="${maven.ant.tasks.jar}"/>
    </target>

    <target name="-obtain-maven-task-jar">
        <available property="maven.ant.tasks.jar.exists" file="${maven.ant.tasks.jar}"/>
        <antcall target="download-maven-jar"/>
    </target>

    <target name="download-maven-jar" unless="maven.ant.tasks.jar.exists">
        <property name="maven.ant.tasks.url" value="${maven.ant.tasks.mirror}${maven.ant.tasks.jar}"/>
        <get src="${maven.ant.tasks.url}" dest="${maven.ant.tasks.jar}"/>
    </target>
</project>

Ref - http://maven.apache.org/ant-tasks/examples/dependencies.html