==================2014-04-19添加========可访问===============================
http://nexus.openkoala.org/nexus/content/groups/Koala-release/
http://maven.antelink.com/content/repositories/central/
http://mirrors.ibiblio.org/maven2/
http://repository.sonatype.org/content/groups/public/
http://maven.tmatesoft.com/content/groups/public/
http://repository.jboss.org/nexus/content/groups/public
http://mavensync.zkoss.org/maven2/