<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.17.1</version>
</dependency>
</dependencies>
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 static void main(String[] args) {
logger.info("Hello, Log4j!");
logger.error("An error occurred.");
}
}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%-5level] %logger{36} - %msg%n" />
</Console>
<File name="File" fileName="logs/myapp.log">
<PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%-5level] %logger{36} - %msg%n" />
</File>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="Console" />
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>
