import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class MyClass {
private static final Logger logger = LoggerFactory.getLogger(MyClass.class);
public void doSomething() {
logger.info("This is an info log message");
logger.warn("This is a warning log message");
logger.error("This is an error log message");
}
}
log4j.rootCategory=warn
logger.info("User {} logged in successfully", username);
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.32</version>
</dependency>
properties
log4j.rootCategory=info, console
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %p [%c{1}] - %m%n
