no plugin found for prefix 'tomcat 7' in the current project and in the plugin groups

解决办法:

 <repositories>
<repository>
<id>people.apache.snapshots</id>
<url>http://repository.apache.org/content/groups/snapshots-group/  </url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>apache.snapshots</id>
<name>Apache Snapshots</name>
<url>http://repository.apache.org/content/groups/snapshots-group/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>