Logback is a reliable, generic, fast and flexible logging library for Java. It's intended as a successor to the popular log4j project. . The logback-core module lays the groundwork for the other two modules. . The logback-classic module can be assimilated to a significantly improved version of log4j. Moreover, logback-classic natively implements the SLF4J API so that you can readily switch back and forth between logback and other logging systems such as log4j or java.util.logging (JUL). . The logback-access module integrates with Servlet containers, such as Tomcat and Jetty, to provide HTTP-access log functionality.
