MyEclipse maven install 时Unable to load the mojo 'war' in the plugin解决方法

MyEclipse maven install 时Unable to load the mojo war in the plugin解决办法今天在工作中遇到一个很

MyEclipse maven install 时Unable to load the mojo 'war' in the plugin解决办法
今天在工作中遇到一个很郁闷的问题,用myeclipse的maven插件mvn install的时候老是失败,报错如下:
[INFO] ------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------
[INFO] Total time: 1.134s
[INFO] Finished at: Wed Mar 14 15:39:12 CST 2012
[INFO] Final Memory: 3M/6M
[INFO] ------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1-alpha-1:war (default-war) on project aipisoft_search_web: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.1-alpha-1:war failed: Unable to load the mojo 'war' in the plugin 'org.apache.maven.plugins:maven-war-plugin:2.1-alpha-1'. A required class is missing: org/codehaus/plexus/archiver/jar/JarArchiver
后来发现是maven指定版本问题,在pom.xml中添加如下内容解决问题:
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>   
      <artifactId>maven-war-plugin</artifactId>   
      <version>2.1.1</version>  
        <configuration>  

        </configuration>  
     </plugin>