How does slf4j configure logback?

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slf4j How to do logback Configuration ?

slf4j brief introduction :

  slf4j,simple logging facade for java Abbreviation , Translated into java Simple appearance log .slf4j It's an open source project , It provides us with a consistent API To use different logging frameworks , such as ： java.util.logging,logback,log4j etc. .slf4j Enable users to embed the logging framework they want to use at runtime . You can see from the name , It actually uses facade Design patterns to achieve .

　　 Use slf4j, There is only one mandatory dependency , Namely slf4j-api-x.x.x.jar, When we write code , Only use this jar In the bag API, The application finds the specific logging framework of the binding under the classpath at run time , And use the bound logging framework to perform actual logging operations , If no suitable binding is found under the classpath of the application ,slf4j By default, an implementation without any operation is used .

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The following is about slf4j Middle configuration logback Method sharing , As shown below :

Step one :pom.xml add to logback rely on

<dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-api</artifactId>
	<version>1.7.25</version>
</dependency>
<dependency>
	<groupId>ch.qos.logback</groupId>
	<artifactId>logback-classic</artifactId>
	<version>1.2.3</version>
</dependency>
<dependency>
	<groupId>ch.qos.logback</groupId>
	<artifactId>logback-core</artifactId>
	<version>1.2.3</version>
</dependency>

Step two : To configure logback

logback Configuration details logback.xml Full profile

Write test code

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class LoggerTest {
    private static final Logger logger = LoggerFactory.getLogger(LoggerTest.class);

    public static void main(String[] args) {
	logger.error(" A serious warning ");
	logger.warn(" Warning ");
	logger.info(" General information ");
	logger.debug(" Debugging information ");
    }
}