Как настроить журналирование с помощью Log4j в Java?

В pom.xml:

log4j
    log4j
    1.2.15

// Import log4j classes.

import org.apache.log4j.Logger;
import org.apache.log4j.BasicConfigurator;

public class MyApp {
    // Define a static logger variable so that it references the
    // Logger instance named "MyApp".
    static Logger logger = Logger.getLogger(MyApp.class);

    public static void main(String[] args) {

        // Set up a simple configuration that logs on the console.
        BasicConfigurator.configure();

        logger.info("Entering application.");
        Bar bar = new Bar();
        bar.doIt();
        logger.info("Exiting application.");
    }
}