SpringBoot在運行的時候會出現NoClassDefFoundError: org/apache/juli/logging/LogFactory的錯誤，具體錯誤內容如下：
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( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
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:: Spring Boot :: (v1.5.3.RELEASE)
2018-05-01 18:29:22.340 INFO 8092 --- [ main] com.itmayiedu.App : Starting App on XTZ-01803282120 with PID 8092 (G:\workspace\springboot-redis\target\classes started by Administrator in G:\workspace\springboot-redis)
2018-05-01 18:29:22.343 INFO 8092 --- [ main] com.itmayiedu.App : No active profile set, falling back to default profiles: default
2018-05-01 18:29:22.392 INFO 8092 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2880cac9: startup date [Tue May 01 18:29:22 CST 2018]; root of context hierarchy
2018-05-01 18:29:22.832 INFO 8092 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2018-05-01 18:29:23.236 WARN 8092 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory
2018-05-01 18:29:23.242 ERROR 8092 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:536) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at com.itmayiedu.App.main(App.java:10) [classes/:na]
Caused by: java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory
at org.apache.catalina.util.LifecycleBase.<clinit>(LifecycleBase.java:37) ~[tomcat-embed-core-7.0.59.jar:7.0.59]
at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:169) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:164) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:134) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
... 8 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.juli.logging.LogFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:200) ~[na:1.6.0_13]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.6.0_13]
at java.net.URLClassLoader.findClass(URLClassLoader.java:188) ~[na:1.6.0_13]
at java.lang.ClassLoader.loadClass(ClassLoader.java:307) ~[na:1.6.0_13]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) ~[na:1.6.0_13]
at java.lang.ClassLoader.loadClass(ClassLoader.java:252) ~[na:1.6.0_13]
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) ~[na:1.6.0_13]
... 12 common frames omitted
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-logging-juli</artifactId>
<version>7.0.27</version>
</dependency>
重新啓動後問題解決。。。