What are some examples of using Log4j2 for logging in Java?

Can you provide some examples of how to use Log4j2 for logging in a Java application?

Sure! Here are a few examples of using Log4j2 for logging in Java applications.

1. Basic Configuration:

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class MyApp {
    private static final Logger logger = LogManager.getLogger(MyApp.class);

    public static void main(String[] args) {
        logger.info("Application started");
    }
}

2. Logging with Different Levels:

logger.debug("Debugging information");
logger.error("An error occurred", exception);
logger.warn("This is a warning");

What about configuring the logging level in the XML configuration?

You can configure the logging level in the log4j2.xml file like this:

<Configuration>
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} %p %c{1} - %m%n"/>
        </Console>
    </Appenders>
    <Loggers>
        <Root level="info">
            <AppenderRef ref="Console"/>
        </Root>
    </Loggers>
</Configuration>