I click \"download sources and documentation\" in Intellij Idea Community Edition 12.1.4 and get error that sources can not be downloaded. But when I try:
mv
"I had the same issue with IntelliJ IDEA 2016.1.3 and Maven 3.2.1. No solution mentioned here was working. In my case a newer Maven version fixed the issue. With Maven 3.3.9 IDEA can now download the sources."
anything's already in the former answers...
mvn dependency:sources
maybe it is not a full IDE solution, but hope it solves your issue