maven打包war出错求解说API不兼容

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project web_mo: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.2:war failed: Unable to load the mojo 'war' in the plugin 'org.apache.maven.plugins:maven-war-plugin:2.2' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: Cannot access defaults field of Properties

你先运行清理一下maven试试，点击maven下的clean，然后再进行package
不行的话你就加上打包插件试试，将他放到pom.xml的plugins下，然后clean，刷新maven等待下载成功，在进行package

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>   
      <artifactId>maven-war-plugin</artifactId>   
      <version>2.1.1</version>  
        <configuration>  
        </configuration>  
     </plugin>

解决了吗，我遇见和你一样的问题