<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.17.1</version>
</dependency>
</dependencies>
properties
log4j.rootLogger=DEBUG, 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} %-5p %c{1}:%L - %m%n
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class MyClass {
private static final Logger logger = LogManager.getLogger(MyClass.class);
public void doSomething() {
logger.debug("This is a debug message");
logger.info("This is an info message");
logger.warn("This is a warning message");
logger.error("This is an error message");
logger.fatal("This is a fatal message");
}
}
2022-08-01 12:34:56 DEBUG MyClass:10 - This is a debug message
2022-08-01 12:34:57 INFO MyClass:11 - This is an info message
2022-08-01 12:34:58 WARN MyClass:12 - This is a warning message
2022-08-01 12:34:59 ERROR MyClass:13 - This is an error message
2022-08-01 12:35:00 FATAL MyClass:14 - This is a fatal message
