MAVEN-ERROR - Could not initialize class org.apache.maven.plugin.war.util.WebappStructureSerializer

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-war-plugin</artifactId>
    <version>2.2</version>
    <configuration> <!-- license file Exclude 지정 개발 완료시점 이용 -->
        <packagingExcludes>WEB-INF/classes/nexacro17_server_license.xml</packagingExcludes>
    </configuration>
</plugin>

 

// 위의 내용처럼 project-build-plugins 에 maven-war-plugin 추가한다.