The .jar.asc files contain a PGP signature.
To make maven download the jar from maven central, add the dependency to pom.xml
, e.g.
<dependencies>
<dependency>
<groupId>org.jfxtras</groupId>
<artifactId>jfxtras-all</artifactId>
<version>8.0-r5</version>
</dependency>
</dependencies>
Or grab the jars manually from http://central.maven.org/maven2/org/jfxtras/ and add them to your project.
If you want to use the bleeding edge snapshot (currently 8.0r6-SNAPSHOT), you'll need to add the sonatype repository to your pom like
<repositories>
<repository>
<id>snapshots-repo</id>
<name>Sonatype Snapshots</name>
<url>https://oss.sonatype.org/content/repositories/snapshots/</url>
</repository>
</repositories>
And add the current snapshot to the dependencies, e.g.
<dependencies>
<dependency>
<groupId>org.jfxtras</groupId>
<artifactId>jfxtras-all</artifactId>
<version>8.0-r6-SNAPSHOT</version>
</dependency>
</dependencies>
But be aware that they're development versions (unstable), and their availability in that location can be temporary.
To download the -SNAPSHOT jars manually, you go to the sonata snapshot repository, choose the jfxtras package that you want to download, and scroll down to find the jar. They're simply not keeping all the older snapshots.