1. maven项目添加依赖

  <dependencies>
   <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.12.0</version>
  </dependency>
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.12.0</version>
  </dependency>
  </dependencies> 2.  添加log4j2配置文件，目录如下图 3. 配置文件名log4j2.xml，内容如下 <?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
    </Console>
  </Appenders>
  <Loggers>
    <Root level="info">
      <AppenderRef ref="Console"/>
    </Root>
  </Loggers>
</Configuration>   4. 测试配置和打印结果5. 5.参考官方文档连接： https://logging.apache.org/log4j/2.x/manual/configuration.html