程序包 org.apache.commons.logging
java.util.logging
. This is a custom bridge along the lines of jcl-over-slf4j
. You may exclude spring-jcl
and switch to jcl-over-slf4j
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 or 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. However, 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 back to java.util.logging
. If you run into any issues with this implementation, consider excluding spring-jcl
and switching to the standard commons-logging
artifact or to jcl-over-slf4j
.
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 java.util.logging
.
接口概要 接口 说明 Log A simple logging interface abstracting logging APIs.类概要 类 说明 LogFactory A minimal incarnation of Apache Commons Logging'sLogFactory
API, providing just the commonLog
lookup methods.LogFactoryService 已过时。 since it is only meant to be used in the above-mentioned fallback scenario