examples/src/main/resources/log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>

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 ! contributor license agreements.  See the NOTICE file distributed with
 ! this work for additional information regarding copyright ownership.
 ! The ASF licenses this file to You under the Apache License, Version 2.0
 ! (the "License"); you may not use this file except in compliance with
 ! the License.  You may obtain a copy of the License at
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 !      http://www.apache.org/licenses/LICENSE-2.0
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<!-- https://logging.apache.org/log4j/2.x/manual/configuration.html 
     https://logging.apache.org/log4j/2.x/manual/appenders.html
-->
<Configuration>
    <Appenders>
        <Console name="STDOUT" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss} %-5p %C{2}:%L - %m%n"/>
        </Console>
    </Appenders>
    <Loggers>
        <Root level="info">
            <AppenderRef ref="STDOUT"/>
        </Root>
    </Loggers>
</Configuration>