shared warehouse
http://repository.sonatype.org/content/groups/public/
http://mirrors.ibiblio.org/pub/mirrors/maven2/org/acegisecurity/http://mvnrepository.com/http://search.maven.org/
private repository
http://repository.codehaus.org/
http://snapshots.repository.codehaus.org/
http://people.apache.org/repo/m2-snapshot-repository
http://people.apache.org/repo/m2-incubating-repository/
from http://blog.csdn.net/kqygww/article/details/12837783