slf4jlogbackclassic

slf4j-logback-classic is the SLF4J binding for the Logback Classic implementation. It serves as the bridge that lets Java applications log through the SLF4J API while using Logback as the runtime logging framework.

SLF4J is a lightweight façade that decouples application code from a specific logging framework. Logback Classic, developed by the same author, is a fast, feature-rich logging framework that implements the SLF4J API via the binding provided by slf4j-logback-classic.

Configuration and usage: Add the slf4j-api and slf4j-logback-classic dependencies (and the logback-core and logback-classic libraries) to your project. Configure logging with a logback.xml or logback-test.xml file, specifying loggers, levels, and appenders such as ConsoleAppender, RollingFileAppender, or AsyncAppender. The typical setup prints to console in development and to files in production; pattern layouts control message formatting.

Notes: Only one SLF4J binding should be present on the classpath to avoid conflicts. The combination is common in Java applications, including Spring Boot, which uses Logback as the default logging backend when SLF4J is in use.