Web Reference: Spring Boot uses Commons Logging for all internal logging but leaves the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4j2, and Logback. In each case, loggers are pre-configured to use console output with optional file output also available. In this short tutorial, we’re going to explore the main logging options available in Spring Boot. Deeper information about Logback is available in A Guide to Logback, while Log4j2 is introduced in Intro to Log4j2 – Appenders, Layouts and Filters. If you are on Spring Boot then you can directly add following properties in application.properties file to set logging level, customize logging pattern and to store logs in the external file.
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