Springboot +log4j2

1. 屏蔽所有log4j

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-logging</artifactId>
    <exclusions>
        <exclusion>
            <groupId>*</groupId>
            <artifactId>*</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>

2. IDEA 调试时，记得清空target目录下，因为有缓存，尝试了很多次都是有问题，清空后即可。

参考：
log4j-slf4j-impl cannot be present with log4j-to-slf4j_草原孤狼的专栏-CSDN博客