Caused by: org.apache.logging.log4j.LoggingException: log4j-slf4j-impl cannot be present with log4j-to-slf4j

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/D:/wangxue/maven/repository/org/apache/logging/log4j/log4j-slf4j-impl/2.12.1/log4j-slf4j-impl-2.12.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/D:/wangxue/maven/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
Exception in thread "main" java.lang.ExceptionInInitializerError
	at com.nstl.ncloud.OAuthApplication.main(OAuthApplication.java:16)
Caused by: org.apache.logging.log4j.LoggingException: log4j-slf4j-impl cannot be present with log4j-to-slf4j

springcloud项目本身需要spring-boot-starter-web包，我又额外用了spring-boot-starter-log4j2。运行时一直报以下的错误，一开始以为是spring-boot-starter-web与spring-cloud-starter-gateway冲突了，实际这俩不在同一个微服务里面是不会冲突的。

最后发现是spring-boot-starter冲突了，我开始是没有引入的，是spring-boot-starter-web自带的。

解决：引入spring-boot-starter包，而且要放在spring-boot-starter-web前面，有个顺序问题。

这样我的情况就解决了！