仓库索引地址:
http://mvnrepository.com/ http://search.maven.org/
仓库下载地址：
https://repo1.maven.org/maven2/ https://repository.jboss.org/maven2/ https://repository.sonatype.org/content/groups/public/ http://maven.aliyun.com/nexus/content/groups/public http://repo.springsource.org/libs-milestone-local http://repository.cloudera.com/artifactory/cloudera-repos/
