<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.19.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-api -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.19.0</version>
</dependency>

public class UserMapperTest {
    @Test
    public void test2() {
        Logger logger = LogManager.getLogger(UserMapperTest.class);
        logger.fatal("fatal信息");
        logger.error("error信息");
        logger.warn("warn信息");
        logger.info("info信息");
        logger.debug("debug信息");
        logger.trace("trace信息");
    }
}

13:54:24.799 [main] FATAL top.imustctf.dao.UserMapperTest - fatal信息
13:54:24.805 [main] ERROR top.imustctf.dao.UserMapperTest - error信息

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
    </Console>
  </Appenders>
  <Loggers>
    <Root level="error">
      <AppenderRef ref="Console"/>
    </Root>
  </Loggers>
</Configuration>

<?xml version="1.0" encoding="UTF-8"?>
<!-- monitorInterval：自动加载配置文件的间隔秒数 -->
<Configuration monitorInterval="30">
    <!-- 先定义所有的Appender -->
    <Appenders>
        <!-- 这个输出控制台的配置 -->
        <Console name="Console" target="SYSTEM_OUT">
        </Console>
        <!-- 文件会打印出所有信息，这个log每次运行程序会自动清空，由append属性决定 -->
        <File name="log" fileName="log/imustctf.log" append="true">
        </File>
        <!-- 这个会打印出所有的info及以下级别的信息，每次大小超过size，则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档 -->
        <RollingFile name="RollingFileInfo" fileName="${sys:user.home}/logs/info.log"
                     filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
            <!-- 控制台只输出info及以上级别的信息（onMatch），其他的直接拒绝（onMismatch） -->
            <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="20 MB"/>
            </Policies>
        </RollingFile>
        <RollingFile name="RollingFileWarn" fileName="${sys:user.home}/logs/warn.log"
                     filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
            <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
            <!-- DefaultRolloverStrategy属性如不设置，则默认为最多同一文件夹下7个文件，这里设置了20 -->
            <DefaultRolloverStrategy max="20"/>
        </RollingFile>
        <RollingFile name="RollingFileError" fileName="${sys:user.home}/logs/error.log"
                     filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log">
            <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
        </RollingFile>
    </Appenders>
    <!-- 然后定义logger，只有定义了logger并引入的appender，appender才会生效 -->
    <Loggers>
        <Root level="all">
            <Appender-ref ref="Console"/>
            <Appender-ref ref="log"/>
            <Appender-ref ref="RollingFileInfo"/>
            <Appender-ref ref="RollingFileWarn"/>
            <Appender-ref ref="RollingFileError"/>
        </Root>
    </Loggers>
</Configuration>