aaa

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-antrun-plugin</artifactId>
    <executions>
        <execution>
            <phase>initialize</phase>
            <goals><goal>run</goal></goals>
            <configuration>
                <target>
                    <echo message="APP_ENV = ${APP_ENV}"/>
                </target>
            </configuration>
        </execution>
    </executions>
</plugin>