This is a custom bridge along the lines of
You may exclude
spring-jcl and switch to
instead if you prefer the hard-bound SLF4J bridge. However, Spring's own
bridge provides a better out-of-the-box experience when using Log4J 2
java.util.logging, with no extra bridge jars necessary, and
also easier setup of SLF4J with Logback (no JCL exclude, no JCL bridge).
Log is equivalent to the original.
LogFactory is a very different
implementation which is minimized and optimized for Spring's purposes,
detecting Log4J 2.x and SLF4J 1.7 in the framework classpath and falling
java.util.logging. If you run into any issues with this
implementation, consider excluding
spring-jcl and switching to the
commons-logging artifact or to
Note that this Commons Logging bridge is only meant to be used for
framework logging purposes, both in the core framework and in extensions.
For applications, prefer direct use of Log4J/SLF4J or
ClassDescriptionA simple logging interface abstracting logging APIs.A minimal incarnation of Apache Commons Logging's
LogFactoryAPI, providing just the common
Loglookup methods.Deprecated.since it is only meant to be used in the above-mentioned fallback scenario