求解 啊 java maven项目

Question

[INFO] Scanning for projects...
[INFO] Downloading: http://localhost/nexus-2.7.0-06/content/groups/public/org/codehaus/mojo/tomcat-maven-plugin/1.1/tomcat-maven-plugin-1.1.pom
[WARNING] Failed to retrieve plugin descriptor for org.codehaus.mojo:tomcat-maven-plugin:1.1: Plugin org.codehaus.mojo:tomcat-maven-plugin:1.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.codehaus.mojo:tomcat-maven-plugin:jar:1.1
[INFO] Downloading: http://localhost/nexus-2.7.0-06/content/groups/public/org/apache/maven/plugins/maven-release-plugin/2.3.2/maven-release-plugin-2.3.2.pom
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-release-plugin:2.3.2: Plugin org.apache.maven.plugins:maven-release-plugin:2.3.2 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-release-plugin:jar:2.3.2
[INFO] Downloading: http://localhost/nexus-2.7.0-06/content/groups/public/org/codehaus/mojo/maven-metadata.xml
[INFO] Downloading: http://localhost/nexus-2.7.0-06/content/groups/public/org/apache/maven/plugins/maven-metadata.xml
[WARNING] Could not transfer metadata org.apache.maven.plugins/maven-metadata.xml from/to nexus (http://localhost/nexus-2.7.0-06/content/groups/public/): Connection to http://localhost refused
[WARNING] Could not transfer metadata org.codehaus.mojo/maven-metadata.xml from/to nexus (http://localhost/nexus-2.7.0-06/content/groups/public/): Connection to http://localhost refused
[WARNING] Failure to transfer org.apache.maven.plugins/maven-metadata.xml from http://localhost/nexus-2.7.0-06/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of nexus has elapsed or updates are forced. Original error: Could not transfer metadata org.apache.maven.plugins/maven-metadata.xml from/to nexus (http://localhost/nexus-2.7.0-06/content/groups/public/): Connection to http://localhost refused
[WARNING] Failure to transfer org.codehaus.mojo/maven-metadata.xml from http://localhost/nexus-2.7.0-06/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of nexus has elapsed or updates are forced. Original error: Could not transfer metadata org.codehaus.mojo/maven-metadata.xml from/to nexus (http://localhost/nexus-2.7.0-06/content/groups/public/): Connection to http://localhost refused
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.590s
[INFO] Finished at: Wed Jul 29 22:26:26 CST 2015
[INFO] Final Memory: 9M/154M
[INFO] ------------------------------------------------------------------------
[ERROR] No plugin found for prefix 'tomcat' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (E:\apache-maven-3.1.1\repository), nexus (http://localhost/nexus-2.7.0-06/content/groups/public/)] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/NoPluginFoundForPrefixException

Answer 1

 <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>