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完美解決Logback configuration error detected的問題

 更新時間：2021年08月27日 09:40:40   作者：青蛙與大鵝  
這篇文章主要介紹了完美解決Logback configuration error detected的問題，具有很好的參考價值，希望對大家有所幫助。如有錯誤或未考慮完全的地方，望不吝賜教

今天在springboot項目中替換log4j2日志的時候遇見的問題，閑話不多說。

錯誤日志

Logging system failed to initialize using configuration from 'classpath:log4j2-dev.xml'
java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.joran.spi.Interpreter@3:16 - no applicable action for [appenders], current ElementPath  is [[configuration][appenders]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@4:67 - no applicable action for [Console], current ElementPath  is [[configuration][appenders][Console]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@5:96 - no applicable action for [PatternLayout], current ElementPath  is [[configuration][appenders][Console][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@10:119 - no applicable action for [RollingFile], current ElementPath  is [[configuration][appenders][RollingFile]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@11:96 - no applicable action for [PatternLayout], current ElementPath  is [[configuration][appenders][RollingFile][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@12:23 - no applicable action for [Policies], current ElementPath  is [[configuration][appenders][RollingFile][Policies]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@13:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@14:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@16:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath  is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@21:79 - no applicable action for [RollingFile], current ElementPath  is [[configuration][appenders][RollingFile]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@22:96 - no applicable action for [PatternLayout], current ElementPath  is [[configuration][appenders][RollingFile][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@23:23 - no applicable action for [Policies], current ElementPath  is [[configuration][appenders][RollingFile][Policies]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@24:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@25:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@27:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath  is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@28:79 - no applicable action for [ThresholdFilter], current ElementPath  is [[configuration][appenders][RollingFile][ThresholdFilter]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@32:14 - no applicable action for [loggers], current ElementPath  is [[configuration][loggers]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@36:64 - no applicable action for [logger], current ElementPath  is [[configuration][loggers][logger]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@37:42 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@38:43 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@39:44 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@43:77 - no applicable action for [logger], current ElementPath  is [[configuration][loggers][logger]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@44:42 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@50:28 - no applicable action for [root], current ElementPath  is [[configuration][loggers][root]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@52:42 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][root][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@53:43 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][root][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@54:44 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][root][appender-ref]]
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:162)
	at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithSpecificConfig(AbstractLoggingSystem.java:66)
	at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:56)
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:114)
	at org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:309)
	at org.springframework.boot.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:277)
	at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:240)
	at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:213)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122)
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74)
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:325)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:296)
	at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:121)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116)
	at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83)
	at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:189)
	at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:131)
	at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
java.lang.IllegalStateException: Failed to load ApplicationContext
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
	at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83)
	at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:189)
	at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:131)
	at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.IllegalStateException: java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.joran.spi.Interpreter@3:16 - no applicable action for [appenders], current ElementPath  is [[configuration][appenders]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@4:67 - no applicable action for [Console], current ElementPath  is [[configuration][appenders][Console]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@5:96 - no applicable action for [PatternLayout], current ElementPath  is [[configuration][appenders][Console][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@10:119 - no applicable action for [RollingFile], current ElementPath  is [[configuration][appenders][RollingFile]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@11:96 - no applicable action for [PatternLayout], current ElementPath  is [[configuration][appenders][RollingFile][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@12:23 - no applicable action for [Policies], current ElementPath  is [[configuration][appenders][RollingFile][Policies]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@13:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@14:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@16:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath  is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@21:79 - no applicable action for [RollingFile], current ElementPath  is [[configuration][appenders][RollingFile]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@22:96 - no applicable action for [PatternLayout], current ElementPath  is [[configuration][appenders][RollingFile][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@23:23 - no applicable action for [Policies], current ElementPath  is [[configuration][appenders][RollingFile][Policies]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@24:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@25:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@27:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath  is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@28:79 - no applicable action for [ThresholdFilter], current ElementPath  is [[configuration][appenders][RollingFile][ThresholdFilter]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@32:14 - no applicable action for [loggers], current ElementPath  is [[configuration][loggers]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@36:64 - no applicable action for [logger], current ElementPath  is [[configuration][loggers][logger]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@37:42 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@38:43 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@39:44 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@43:77 - no applicable action for [logger], current ElementPath  is [[configuration][loggers][logger]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@44:42 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@50:28 - no applicable action for [root], current ElementPath  is [[configuration][loggers][root]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@52:42 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][root][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@53:43 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][root][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@54:44 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][root][appender-ref]]
	at org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:316)
	at org.springframework.boot.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:277)
	at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:240)
	at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:213)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122)
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74)
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:325)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:296)
	at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:121)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116)
	... 24 more
Caused by: java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.joran.spi.Interpreter@3:16 - no applicable action for [appenders], current ElementPath  is [[configuration][appenders]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@4:67 - no applicable action for [Console], current ElementPath  is [[configuration][appenders][Console]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@5:96 - no applicable action for [PatternLayout], current ElementPath  is [[configuration][appenders][Console][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@10:119 - no applicable action for [RollingFile], current ElementPath  is [[configuration][appenders][RollingFile]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@11:96 - no applicable action for [PatternLayout], current ElementPath  is [[configuration][appenders][RollingFile][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@12:23 - no applicable action for [Policies], current ElementPath  is [[configuration][appenders][RollingFile][Policies]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@13:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@14:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@16:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath  is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@21:79 - no applicable action for [RollingFile], current ElementPath  is [[configuration][appenders][RollingFile]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@22:96 - no applicable action for [PatternLayout], current ElementPath  is [[configuration][appenders][RollingFile][PatternLayout]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@23:23 - no applicable action for [Policies], current ElementPath  is [[configuration][appenders][RollingFile][Policies]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@24:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@25:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath  is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@27:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath  is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@28:79 - no applicable action for [ThresholdFilter], current ElementPath  is [[configuration][appenders][RollingFile][ThresholdFilter]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@32:14 - no applicable action for [loggers], current ElementPath  is [[configuration][loggers]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@36:64 - no applicable action for [logger], current ElementPath  is [[configuration][loggers][logger]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@37:42 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@38:43 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@39:44 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@43:77 - no applicable action for [logger], current ElementPath  is [[configuration][loggers][logger]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@44:42 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][logger][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@50:28 - no applicable action for [root], current ElementPath  is [[configuration][loggers][root]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@52:42 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][root][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@53:43 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][root][appender-ref]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@54:44 - no applicable action for [appender-ref], current ElementPath  is [[configuration][loggers][root][appender-ref]]
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:162)
	at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithSpecificConfig(AbstractLoggingSystem.java:66)
	at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:56)
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:114)
	at org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:309)
	... 38 more
Disconnected from the target VM, address: '127.0.0.1:65035', transport: 'socket'
Process finished with exit code -1

首先我們看上面的錯誤日志

Logging system failed to initialize using configuration from 'classpath:log4j2-dev.xml'
java.lang.IllegalStateException: Logback configuration error detected:

如果只看這兩句的話我們可能會認(rèn)為是我們的日志文件log4j2-dev.xml配置錯了，或者路徑找不到，其實不然。正解是我們pom文件配置的有問題，jar包存在沖突，下面來看下我們的pom文件吧

pom.xml

  <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
      </dependency>

上面的pom文件是最初報錯時的配置文件，看上面的配置文件貌似沒有問題，我們需使用log4j2日志的starter也已經(jīng)引入了，但是這里我們需要注意一點就是我們在引入spring-boot-starter-web包的時候他里面默認(rèn)使用了logback日志，這樣就會產(chǎn)生日志包的沖突，其實不只是starter-web包默認(rèn)引入的logback還有很多的包默認(rèn)引入的logback包，看下圖

在這里插入圖片描述

上圖中是這個pom文件的jiar包結(jié)構(gòu)示意圖，log4j2部分就是我們新引入的spring-boot-starter-log4j2包，上圖中我通過黃線畫出了現(xiàn)在系統(tǒng)中所有l(wèi)ogback的引入，可以看出所有引用，這里涉及到幾個包，分別是web包，mybatis包，jdbc包。那我們現(xiàn)在要解決jar包沖突的問題是不是需要每個包下都排除默認(rèn)引用的logger日志呢，理論上是完全沒有問題的，但是那樣豈不是很費事，2種解決辦法。

解決辦法1

統(tǒng)一排除

  <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>

解決辦法2

那我只導(dǎo)用了web包，不想導(dǎo)入spring-boot-starter能不能解決呢？

答 ： 能

   <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>

看見第二個解決辦法，問題是不是來了。很多包都默認(rèn)使用的logback,你單獨排除了web包是不是還會出現(xiàn)這個問題，

答 ： 是的會出現(xiàn)，這里就需要知道pom文件的加載順序了，pom文件的加載順序也是從上至下執(zhí)行，那么我們就需要把web包放到pom文件中的第一位，在向下執(zhí)行的時候也會排除所有的默認(rèn)logger了。

上面就是兩種解決辦法。希望能給大家一個參考，也希望大家多多支持腳本之家。

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