Spring Boot使用Log4j2的实例代码

前言

Spring Boot 默认使用Logback,来打印日志，这里还想说的SLFJ(Simple Logging Facade for Java)，它们之间的关系，一张图，说明一切：

Maven 配置

<!--use log4j2 property-->    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter</artifactId>      <exclusions>        <exclusion>          <groupId>org.springframework.boot</groupId>          <artifactId>spring-boot-starter-logging</artifactId>        </exclusion>      </exclusions>    </dependency>    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter-log4j2</artifactId>    </dependency>    <!--flume log4j appender-->    <dependency>      <groupId>org.apache.logging.log4j</groupId>      <artifactId>log4j-flume-ng</artifactId>      <version>2.6</version>    </dependency>