Spring Boot内嵌了一个容器，我可以不用吗？我能不能用外部的容器呢？
当然是可以的！
然后，下面代码在pom文件中一定要有哦！
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>provided</scope> </dependency>
然后，我就配置了，我本机已经安装好的tomcat7，来运行。
然后选择
选择项目
点击apply，点击OK。完成
启动tomcat，查看日志
D: omcatapache-tomcat-7.0.88incatalina.bat run [2019-01-09 02:56:58,023] Artifact demo0109:war exploded: Waiting for server connection to start artifact deployment... Using CATALINA_BASE: "C:UsersAdministrator.20180528-132245.IntelliJIdea2017.3system omcatUnnamed_demo" Using CATALINA_HOME: "D: omcatapache-tomcat-7.0.88" Using CATALINA_TMPDIR: "D: omcatapache-tomcat-7.0.88 emp" Using JRE_HOME: "D:Program FilesJavajdk1.8.0_172" Using CLASSPATH: "D: omcatapache-tomcat-7.0.88inootstrap.jar;D: omcatapache-tomcat-7.0.88in omcat-juli.jar" 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Server version: Apache Tomcat/7.0.88 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Server built: May 7 2018 11:12:57 UTC 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Server number: 7.0.88.0 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: OS Name: Windows 7 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: OS Version: 6.1 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Architecture: amd64 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Java Home: D:Program FilesJavajdk1.8.0_172jre 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: JVM Version: 1.8.0_172-b11 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: JVM Vendor: Oracle Corporation 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: CATALINA_BASE: C:UsersAdministrator.20180528-132245.IntelliJIdea2017.3system omcatUnnamed_demo 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: CATALINA_HOME: D: omcatapache-tomcat-7.0.88 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Djava.util.logging.config.file=C:UsersAdministrator.20180528-132245.IntelliJIdea2017.3system omcatUnnamed_democonflogging.properties 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dcom.sun.management.jmxremote= 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dcom.sun.management.jmxremote.port=1099 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dcom.sun.management.jmxremote.ssl=false 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dcom.sun.management.jmxremote.authenticate=false 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Djava.rmi.server.hostname=127.0.0.1 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Djdk.tls.ephemeralDHKeySize=2048 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dignore.endorsed.dirs= 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dcatalina.base=C:UsersAdministrator.20180528-132245.IntelliJIdea2017.3system omcatUnnamed_demo 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dcatalina.home=D: omcatapache-tomcat-7.0.88 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Djava.io.tmpdir=D: omcatapache-tomcat-7.0.88 emp 一月 09, 2019 2:56:59 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent 信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: D:Program FilesJavajdk1.8.0_172in;C:WindowsSunJavain;C:Windowssystem32;C:Windows;D:Python37;D:Program Files (x86)SybasePowerDesigner 16;D:oracleproduct10.2.0db_1in;D:appAdministratorproduct11.2.0client_1;D:mavenapache-maven-3.5.0in;D:Program FilesJavajdk1.7.0_80in;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;D:Program FilesTortoiseSVNin;C:Program Files (x86)MySQLMySQL Server 5.5in;D:Program FilesEmEditor;D:Python37Scripts;D:Python37Libsite-packagesDjango-2.1.2-py3.7.eggdjango;D:Program FilesGitcmd;D:Python37Scripts;D:Python37;. 一月 09, 2019 2:56:59 下午 org.apache.coyote.AbstractProtocol init 信息: Initializing ProtocolHandler ["http-bio-8080"] 一月 09, 2019 2:56:59 下午 org.apache.coyote.AbstractProtocol init 信息: Initializing ProtocolHandler ["ajp-bio-8009"] 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.Catalina load 信息: Initialization processed in 793 ms 一月 09, 2019 2:56:59 下午 org.apache.catalina.core.StandardService startInternal 信息: Starting service Catalina 一月 09, 2019 2:56:59 下午 org.apache.catalina.core.StandardEngine startInternal 信息: Starting Servlet Engine: Apache Tomcat/7.0.88 一月 09, 2019 2:56:59 下午 org.apache.coyote.AbstractProtocol start 信息: Starting ProtocolHandler ["http-bio-8080"] 一月 09, 2019 2:56:59 下午 org.apache.coyote.AbstractProtocol start 信息: Starting ProtocolHandler ["ajp-bio-8009"] 一月 09, 2019 2:56:59 下午 org.apache.catalina.startup.Catalina start 信息: Server startup in 94 ms Connected to server [2019-01-09 02:57:00,239] Artifact demo0109:war exploded: Artifact is being deployed, please wait... 一月 09, 2019 2:57:02 下午 org.apache.catalina.startup.TldConfig execute 信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. . ____ _ __ _ _ /\ / ___'_ __ _ _(_)_ __ __ _ ( ( )\___ | '_ | '_| | '_ / _` | \/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.1.1.RELEASE) 2019-01-09 14:57:04.701 INFO 9276 --- [on(3)-127.0.0.1] com.example.demo.ServletInitializer : Starting ServletInitializer on 20180528-132245 with PID 9276 (D:SpringBootprojectdemo0109 argetdemo-0.0.1-SNAPSHOTWEB-INFclasses started by Administrator in D: omcatapache-tomcat-7.0.88in) 2019-01-09 14:57:04.711 INFO 9276 --- [on(3)-127.0.0.1] com.example.demo.ServletInitializer : No active profile set, falling back to default profiles: default 2019-01-09 14:57:06.535 INFO 9276 --- [on(3)-127.0.0.1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1525 ms 2019-01-09 14:57:07.302 WARN 9276 --- [on(3)-127.0.0.1] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultValidator' defined in class path resource [org/springframework/boot/autoconfigure/validation/ValidationAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.validation.beanvalidation.LocalValidatorFactoryBean]: Factory method 'defaultValidator' threw exception; nested exception is java.lang.NoClassDefFoundError: javax/el/ELManager 2019-01-09 14:57:07.322 INFO 9276 --- [on(3)-127.0.0.1] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2019-01-09 14:57:07.337 ERROR 9276 --- [on(3)-127.0.0.1] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultValidator' defined in class path resource [org/springframework/boot/autoconfigure/validation/ValidationAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.validation.beanvalidation.LocalValidatorFactoryBean]: Factory method 'defaultValidator' threw exception; nested exception is java.lang.NoClassDefFoundError: javax/el/ELManager at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] 一月 09, 2019 2:57:07 下午 org.apache.catalina.core.ContainerBase addChildInternal 严重: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1017) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:993) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1900) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863) ~[spring-context-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) ~[spring-context-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE] at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE] at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:157) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE] at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:618) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:565) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:137) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:91) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:171) [spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE] at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5669) [catalina.jar:7.0.88] at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) [catalina.jar:7.0.88] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1017) [catalina.jar:7.0.88] at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:993) [catalina.jar:7.0.88] at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468) at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) [catalina.jar:7.0.88] at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401) at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1900) [catalina.jar:7.0.88] at java.lang.reflect.Method.invoke(Method.java:498) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_172] at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_172] at sun.rmi.transport.Transport$1.run(Transport.java:200) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_172] at sun.rmi.transport.Transport$1.run(Transport.java:197) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:196) at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_172] at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:835) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) [tomcat-coyote.jar:7.0.88] at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) [na:1.8.0_172] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) [na:1.8.0_172] at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:618) [catalina.jar:7.0.88] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:565) [catalina.jar:7.0.88] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_172] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_172] at java.lang.Thread.run(Thread.java:748) Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultValidator' defined in class path resource [org/springframework/boot/autoconfigure/validation/ValidationAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.validation.beanvalidation.LocalValidatorFactoryBean]: Factory method 'defaultValidator' threw exception; nested exception is java.lang.NoClassDefFoundError: javax/el/ELManager at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_172] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127) at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_172] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) [tomcat-coyote.jar:7.0.88] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) [na:1.8.0_172] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) [na:1.8.0_172] at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468) [na:1.8.0_172] at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76) [na:1.8.0_172] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863) at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309) [na:1.8.0_172] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401) [na:1.8.0_172] at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829) [na:1.8.0_172] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_172] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_172] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_172] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_172] at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357) [na:1.8.0_172] at sun.rmi.transport.Transport$1.run(Transport.java:200) [na:1.8.0_172] at sun.rmi.transport.Transport$1.run(Transport.java:197) [na:1.8.0_172] at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) at java.security.AccessController.doPrivileged(Native Method) [na:1.8.0_172] at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:157) at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:137) at sun.rmi.transport.Transport.serviceCall(Transport.java:196) [na:1.8.0_172] at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:91) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573) [na:1.8.0_172] at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:835) [na:1.8.0_172] at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688) [na:1.8.0_172] at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:171) at java.security.AccessController.doPrivileged(Native Method) [na:1.8.0_172] at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5669) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPT at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) ... 42 more Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.validation.beanvalidation.LocalValidatorFactoryBean]: Factory method 'defaultValidator' threw exception; nested exception is java.lang.NoClassDefFoundError: javax/el/ELManager at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ... 64 more Caused by: java.lang.NoClassDefFoundError: javax/el/ELManager at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.buildExpressionFactory(ResourceBundleMessageInterpolator.java:88) at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.<init>(ResourceBundleMessageInterpolator.java:47) ransport.java:687) [na:1.8.0_172] at org.hibernate.validator.internal.engine.ConfigurationImpl.getDefaultMessageInterpolator(ConfigurationImpl.java:474) at org.springframework.boot.validation.MessageInterpolatorFactory.getObject(MessageInterpolatorFactory.java:54) at org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration.defaultValidator(ValidationAu at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_172] toConfiguration.java:57) [2019-01-09 02:57:07,485] Artifact demo0109:war exploded: Error during artifact deployment. See server log for details. at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_172] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ... 65 more at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_172] 一月 09, 2019 2:57:07 下午 org.apache.tomcat.util.modeler.BaseModelMBean invoke Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.validation.beanvalidation.LocalValidatorFactoryBean]: Factory method 'defaultValidator' threw exception; nested exception is java.lang.NoClassDefFoundError: javax/el/ELManager 严重: Exception invoking method manageApp at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] ... 64 common frames omitted Caused by: java.lang.NoClassDefFoundError: javax/el/ELManager at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.buildExpressionFactory(ResourceBundleMessageInterpolator.java:88) ~[hibernate-validator-6.0.13.Final.jar:6.0.13.Final] at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.<init>(ResourceBundleMessageInterpolator.java:47) ~[hibernate-validator-6.0.13.Final.jar:6.0.13.Final] at org.hibernate.validator.internal.engine.ConfigurationImpl.getDefaultMessageInterpolator(ConfigurationImpl.java:474) ~[hibernate-validator-6.0.13.Final.jar:6.0.13.Final] at org.springframework.boot.validation.MessageInterpolatorFactory.getObject(MessageInterpolatorFactory.java:54) ~[spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE] at org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration.defaultValidator(ValidationAutoConfiguration.java:57) ~[spring-boot-autoconfigure-2.1.1.RELEASE.jar:2.1.1.RELEASE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_172] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_172] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_172] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_172] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] ... 65 common frames omitted java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1021) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:993) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1900) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:618) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:565) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468) at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76) at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401) at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357) at sun.rmi.transport.Transport$1.run(Transport.java:200) at sun.rmi.transport.Transport$1.run(Transport.java:197) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:196) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:835) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) 一月 09, 2019 2:57:07 下午 org.apache.tomcat.util.modeler.BaseModelMBean invoke 严重: Exception invoking method createStandardContext javax.management.RuntimeOperationsException: Exception invoking method manageApp at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:309) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:618) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:565) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468) at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76) at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401) at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357) at sun.rmi.transport.Transport$1.run(Transport.java:200) at sun.rmi.transport.Transport$1.run(Transport.java:197) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:196) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:835) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1021) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:993) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1900) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) ... 33 more
查阅资料你（百度）
问题原因：
jdk1.8
使用的springboot版本是：2.1.1
tomcat对应的版本是：7.0.88
解决方案：
使用tomcat8.0以上版本