引入log4j2后启动报错。
Exception in thread "main" java.lang.IllegalStateException: java.lang.IllegalStateException: Logback configuration error detected:
ERROR in ch.qos.logback.core.joran.spi.Interpreter@7:17 - no applicable action for [Properties], current ElementPath is [[Configuration][Properties]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@8:35 - no applicable action for [Property], current ElementPath is [[Configuration][Properties][Property]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@9:36 - no applicable action for [Property], current ElementPath is [[Configuration][Properties][Property]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@10:41 - no applicable action for [Property], current ElementPath is [[Configuration][Properties][Property]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@13:16 - no applicable action for [Appenders], current ElementPath is [[Configuration][Appenders]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@15:53 - no applicable action for [Console], current ElementPath is [[Configuration][Appenders][Console]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@16:57 - no applicable action for [PatternLayout], current ElementPath is [[Configuration][Appenders][Console][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@21:14 - no applicable action for [Loggers], current ElementPath is [[Configuration][Loggers]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@24:58 - no applicable action for [Logger], current ElementPath is [[Configuration][Loggers][Logger]]
经查找原因：是由于引入的log4j2和spring-boot-starter-web默认的日志配置冲突。
解决方法：
将spring-boot-starter-web默认的日志排除掉：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
