Mybatis-Logging

Logging

MyBatis provides logging information through the use of an internal log factory. The internal log factory will delegate logging information to one of the following log implementations:

SLF4J
Apache Commons Logging
Log4j 2
Log4j (deprecated since 3.5.9)
JDK logging

The logging solution chosen is based on runtime introspection by the internal MyBatis log factory. The MyBatis log factory will use the first logging implementation it finds (implementations are searched in the above order). If MyBatis finds none of the above implementations, then logging will be disabled.

Many environments ship Commons Logging as a part of the application server classpath (good examples include Tomcat and WebSphere). It is important to know that in such environments, MyBatis will use Commons Logging as the logging implementation. In an environment like WebSphere this will mean that your Log4J configuration will be ignored because WebSphere supplies its own proprietary implementation of Commons Logging. This can be very frustrating because it will appear that MyBatis is ignoring your Log4J configuration (in fact, MyBatis is ignoring your Log4J configuration because MyBatis will use Commons Logging in such environments). If your application is running in an environment where Commons Logging is included in the classpath but you would rather use one of the other logging implementations you can select a different logging implementation by adding a setting in mybatis-config.xml file as follows:

  
    ...
    
    ...
  

Logging Configuration

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