Tomcat启动报错---java.util.concurrent.ExecutionException,ClassNotFoundException异常

Tomcat启动报错如下：

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/EFP]]at java.util.concurrent.FutureTask.report(Unknown Source)at java.util.concurrent.FutureTask.get(Unknown Source)at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:819)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)at java.util.concurrent.FutureTask.run(Unknown Source)at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)at java.lang.Thread.run(Unknown Source)Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/EFP]]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)... 6 moreCaused by: java.lang.NoClassDefFoundError: org/springframework/core/io/Resourceat java.lang.Class.getDeclaredFields0(Native Method)at java.lang.Class.privateGetDeclaredFields(Unknown Source)at java.lang.Class.getDeclaredFields(Unknown Source)at org.apache.catalina.util.Introspection.getDeclaredFields(Introspection.java:106)at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:270)at org.apache.catalina.startup.WebAnnotationSet.loadApplicationListenerAnnotations(WebAnnotationSet.java:89)at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:63)at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:415)at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:892)at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:386)at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5416)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)... 6 moreCaused by: java.lang.ClassNotFoundException: org.springframework.core.io.Resourceat org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)... 20 more

*该异常根本原因在于ClassNotFoundException异常

导致该异常在于以下几个方面：

1.该类的jar包没有导进来，导进jar包，重新部署启动即可。

2.若是使用maven管理，首先看看是否添加了依赖，若是已添加依赖并且已经加载进来，则可能是Tomcat没有加载maven下的jar包，

    解决方案如下：

    右击项目-->properties-->Deployment Assembly—>add—>Java Build Path Entries,选中需要的jar包，finish。这样，重新部署工程，启动运行正常