mvnrepository https://mvnrepository.com/ 最方便查询的库
<repositories>
<repository>
<id>Activiti</id>
<url>http://maven.alfresco.com/nexus/content/repositories/activiti</url>
</repository>
</repositories>
原文：http://www.cnblogs.com/panie2015/p/5825870.html