Maven搭建spring boot启动时报错NoClassDefFoundError: org/apache/juli/logging/LogFactory

开发环境：Myeclipse2017、JDK1.6、Tomcat7.0。

搭建完成启动时报错NoClassDefFoundError: org/apache/juli/logging/LogFactory，以下是报错信息：

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.3.RELEASE)

2017-08-24 14:35:45.824  INFO 20220 --- [           main] com.bocom.boot.ExampleSpringBoot         : Starting ExampleSpringBoot on DESKTOP-5A8O8HP with PID 20220 (E:\myeclipse8.6\maventest\target\classes started by Administrator in E:\myeclipse8.6\maventest)
2017-08-24 14:35:45.827  INFO 20220 --- [           main] com.bocom.boot.ExampleSpringBoot         : No active profile set, falling back to default profiles: default
2017-08-24 14:35:45.920  INFO 20220 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7181ae3f: startup date [Thu Aug 24 14:35:45 CST 2017]; root of context hierarchy
2017-08-24 14:35:47.754  WARN 20220 --- [           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
2017-08-24 14:35:47.767 ERROR 20220 --- [           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.bocom.boot.ExampleSpringBoot.main(ExampleSpringBoot.java:18) [classes/:na]
Caused by: java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory
	at org.apache.catalina.util.LifecycleBase.(LifecycleBase.java:37) ~[catalina.jar:7.0.75]
	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.findClass(URLClassLoader.java:381) ~[na:1.8.0_112]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_112]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_112]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_112]
	... 12 common frames omitted

错误的提示很明确，找不到org.apache.juli.logging.LogFactory类。手动添加tomcat-embed-logging-juli这个jar包。

    org.apache.tomcat.embed
    tomcat-embed-logging-juli
    8.0.23

再次启动，成功运行，问题解决。