logback

Links

SLF4J - Getting Started, Getting Started.

Maven

<dependency>
  <version>0.9.9</version>
  <groupId>ch.qos.logback</groupId>
  <artifactId>logback-classic</artifactId>
</dependency>
<dependency>
  <version>0.9.9</version>
  <groupId>ch.qos.logback</groupId>
  <artifactId>logback-core</artifactId>
</dependency>