java intellij-idea 解决idea日志依赖冲突问题：org/apache/logging/log4j/util/ReflectionUtil

1.在对日志依赖log4j升级为2.15.0版本后启动项目出现了如下错误：

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/logging/log4j/util/ReflectionUtil

at org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:42)

at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:48)

at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:29)

at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:277)

at org.apache.commons.logging.LogAdapter$Slf4jAdapter.createLocationAwareLog(LogAdapter.java:130)

at org.apache.commons.logging.LogAdapter.createLog(LogAdapter.java:91)

at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:67)

at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:59)

at org.springframework.boot.SpringApplication.(SpringApplication.java:196)

at com.tjgeo.tpp.JjRunApplication.main(JjRunApplication.java:33)

Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.util.ReflectionUtil

at java.net.URLClassLoader.findClass(URLClassLoader.java:382)

at java.lang.ClassLoader.loadClass(ClassLoader.java:418)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)

at java.lang.ClassLoader.loadClass(ClassLoader.java:351)

解决方法：

1.先在项目启动模块pom文件中添加：

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-logging

ch.qos.logback

logback-classic

1.2.3

2.接着将以下几个依赖也升级到新版本

org.apache.logging.log4j

log4j-api

2.15.0

org.apache.logging.log4j

log4j-core

2.15.0

org.apache.logging.log4j

log4j-slf4j-impl

2.15.0

3.然后就可以正常启动项目了。

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