Downloading: repo1.maven.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.4.1/maven-clean-plugin-2.4.1.pom

[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-clean-plugin:2.4.1: Plugin org.apache.maven.plugins:maven-clean-plugin:2.4.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1

Downloading: repo1.maven.org/maven2/org/apache/maven/plugins/maven-install-plugin/2.3.1/maven-install-plugin-2.3.1.pom

[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-install-plugin:2.3.1: Plugin org.apache.maven.plugins:maven-install-plugin:2.3.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-install-plugin:jar:2.3.1
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Downloading: repo1.maven.org/maven2/org/apache/maven/plugins/maven-metadata.xml
Downloading: repo1.maven.org/maven2/org/codehaus/mojo/maven-metadata.xml

[WARNING] Could not transfer metadata org.apache.maven.plugins/maven-metadata.xml from/to central (repo1.maven.org/maven2): Error transferring file: Connection refused: connect

[WARNING] Could not transfer metadata org.codehaus.mojo/maven-metadata.xml from/to central (repo1.maven.org/maven2): Error transferring file: Connection refused: connect
Downloading: repo1.maven.org/maven2/org/apache/maven/plugins/maven-metadata.xml
Downloading: repo1.maven.org/maven2/org/codehaus/mojo/maven-metadata.xml

[WARNING] Could not transfer metadata org.apache.maven.plugins/maven-metadata.xml from/to central (repo1.maven.org/maven2): Error transferring file: Connection refused: connect

[WARNING] Could not transfer metadata org.codehaus.mojo/maven-metadata.xml from/to central (repo1.maven.org/maven2): Error transferring file: Connection refused: connect
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 16.479s
[INFO] Finished at: Tue Oct 18 12:44:58 BST 2011
[INFO] Final Memory: 1M/15M
[INFO] ------------------------------------------------------------------------

[ERROR] No plugin found for prefix 'archetype' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (C:\Users\krsl1254\.m2\repository), central (repo1.maven.org/maven2)] 

在maven的配置文件$maven\conf\settings.xml中增加代理信息即可：

<proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <username>proxyuser</username>
      <password>proxypass</password>
      <host>proxy.host.net</host>
      <port>80</port>
      <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>