如何设置log4j2日志级别的默认值，而不是环境变量

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
    <Appenders>
        <!-- 定义日志输出的目标 -->
        <!-- ... -->
    </Appenders>
    <Loggers>
        <Root level="DEBUG">
            <!-- 设置根日志级别为DEBUG -->
            <AppenderRef ref="Console"/>
        </Root>
    </Loggers>
</Configuration>

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("Debug message");
        logger.info("Info message");
        logger.warn("Warning message");
        logger.error("Error message");
    }
}